solar panel blog
  • Lifepo4 Batteries: Powering the Future of Energy Storage
    Lifepo4 Batteries: Powering the Future of Energy Storage Apr 15, 2024
    The shift to renewable energy sources such as solar and wind power opens up exciting possibilities for giving the planet a cleaner future. However, these energy sources have a well-known challenge - inconsistency. That's where energy storage comes in, playing a vital role in bridging the gap between energy production and consumption.   Lithium-ion batteries are at the forefront of energy storage solutions, with lithium iron phosphate (LiFePO4) batteries, also known as LFP batteries, rising rapidly. Let's take a closer look at the promising future of Lifepo4 batteries and explore their use cases in energy storage. Why are Lifepo4 batteries poised for success? Lifepo4 batteries offer several advantages that make them ideal for energy storage applications:   Safety: One of its biggest advantages is its inherent stability. Unlike some other lithium-ion battery types, Lifepo4 batteries are less susceptible to thermal runaway, a dangerous condition that can lead to fire. This makes them a safer choice for large-scale energy storage systems. Long Cycle Life: Lifepo4 batteries have an extremely long cycle life, which means they can go through a large number of charge/discharge cycles before losing capacity. In the long run, this means longer life and lower replacement costs. High Power Density: Lifepo4 batteries provide high power output, making them ideal for applications that require a quick burst of energy, such as grid balancing or electric vehicle charging stations. Wide Temperature Resistance: These batteries perform well over a wider temperature range than other lithium-ion batteries. This is critical for regions with extreme climatic conditions.   Conclusion Lifepo4 batteries are revolutionizing the energy storage sector. Their inherent safety, long lifespan and wide range of applications make them an ideal solution for integrating renewable energy, improving grid stability and powering a sustainable future. As research and development continues, we can expect Lifepo4 batteries to become even more efficient and cost-effective, further solidifying their importance in energy storage.
  • The application of new solar energy in RV
    The application of new solar energy in RV Mar 08, 2024
    As people's concern for environmental protection and energy saving continues to increase, the application of new solar energy in RVs is becoming more and more widespread. The following are some common solar energy products used in RVs: Lithium iron phosphate battery Lithium iron phosphate battery is an efficient, environmentally friendly and safe energy storage device, which is commonly used in the energy storage system of RV. It is capable of storing the electricity generated by solar panels and providing power for the electrical equipment of the caravan when needed. Compared with traditional lead-acid batteries, lithium iron phosphate batteries have higher energy density and longer service life. Solar panel Solar panel is the most basic application of solar energy in RV, which utilizes solar energy to convert into DC power device, and is one of the most common solar energy products in RV. Solar panels are usually installed on the top of the car or outside of the car body, which can absorb solar energy during traveling or parking to provide electricity for the electrical equipment of the caravan. By installing solar panels on the top or outside of the caravan, solar energy can be absorbed and converted into electricity to provide clean energy for the caravan. Solar panels can not only provide electricity for the RV, but also provide sufficient energy for various electrical devices in the RV. Solar vent Solar vent is a kind of solar-powered ventilation equipment, which can provide fresh air inside the caravan, exhaust the hot air inside the caravan, and at the same time introduce fresh air into the caravan to ensure the air quality inside the caravan. This equipment not only saves energy and protects the environment, but also improves the living comfort of the caravan. It can effectively ventilate the interior of the caravan. In the hot summer, the temperature inside the caravan is high, using solar exhaust fan can effectively reduce the temperature inside the caravan and improve the comfort of the caravan. Inverter Inverter is a kind of electronic equipment that converts DC power to AC power. Using inverter in RV can convert DC power in Li-FePO4 battery to AC power for various electrical devices in RV. The power and voltage selection of the inverter needs to be selected according to the power and voltage requirements of the caravan equipment to ensure the normal operation of the equipment, and to be able to prevent the current from being too large or too small to cause damage to the electrical equipment. At the same time, in order to ensure safety, it is also very important to choose a reliable quality inverter that meets the national standards. Commonly used in the power management system of the caravan.   In conclusion, the application of new solar energy in RVs has a wide range of prospects and great potential. The use of these products not only reduces energy consumption and protects the environment, but also improves the range and living comfort of RVs. With the continuous progress of technology and the reduction of application costs, it is believed that the application of new solar energy in RVs will become more and more popular.
  • Impact of Lifepo4 Batteries on Sustainable Energy Development
    Impact of Lifepo4 Batteries on Sustainable Energy Development Feb 07, 2024
    Introduction In recent years, the demand for sustainable energy has grown rapidly. As a result, renewable energy sources, such as solar and wind, have attracted much attention. However, it is still a challenge to store these energy sources efficiently. This is where Lifepo4 batteries come into play.Lifepo4 batteries have emerged as a promising energy storage solution that supports the transition to green energy and has a positive impact on the environment. There is a close relationship between Lifepo4 batteries and sustainable energy development. As renewable energy sources, such as solar and wind, become more prevalent, the efficient storage and release of the electricity generated by these intermittent sources has become a key issue, and the Lifepo4 battery is an ideal solution to this problem due to its highly efficient ability to store and release energy, as well as its long lifespan. Its ability to store large amounts of renewable energy and release it smoothly when needed helps to achieve stable grid operation. In addition, the use of Lifepo4 batteries reduces reliance on traditional fossil fuels, thereby lowering greenhouse gas emissions and further promoting the development of sustainable energy.   Lifepo4 batteries in renewable energy storage Lifepo4 batteries have proven to be an ideal choice for storing renewable energy due to their high energy density, long service life and excellent safety features. These batteries can efficiently store power generated by energy sources such as solar panels or wind turbines, providing a reliable supply of electricity even when generation is low.The versatility and scalability of Lifepo4 batteries make them suitable for both residential and large-scale applications such as power grids and electric vehicle charging stations.   Supporting the transition to green energy One of the biggest challenges facing renewable energy is its intermittent nature. For example, solar power depends on sunshine, while wind power depends on wind speed. With Lifepo4 battery storage, we can overcome these limitations. These batteries provide a constant supply of electricity, acting as a buffer between electricity generation and use. This energy storage capability allows us to make a smoother transition to green energy, reducing our dependence on fossil fuels and ultimately contributing to the sustainability of the planet.   Environmental Impact Lifepo4 batteries are more environmentally friendly than traditional lead-acid batteries. Lead-acid batteries contain toxic substances that can harm the environment if not disposed of properly. Lifepo4 batteries, on the other hand, are non-toxic and non-polluting. They do not release any harmful gases or chemicals, making them a sustainable energy storage solution.Lifepo4 batteries also have a longer lifespan, so fewer batteries are produced and disposed of, further minimizing their impact on the environment. However, despite the many advantages of Lifepo4 batteries, their production and disposal processes can still have some impact on the environment. For example, some of the chemicals in the batteries may contaminate bodies of water and soil. Therefore, while promoting Lifepo4 batteries, it is also necessary to strengthen the monitoring and management of their environmental impacts to ensure that their production and disposal processes comply with environmental standards. Overall, Lifepo4 batteries play an important role in sustainable energy development. Not only does it help to increase the utilization of renewable energy and reduce dependence on fossil fuels, but it is also expected to set a new benchmark for future energy storage and release technologies. However, in order to achieve true sustainability, we need to strengthen the research and development of Lifepo4 batteries while paying attention to their full life-cycle environmental impacts and adopting effective management measures.   Conclusion Lifepo4 batteries have become a key enabler in the development of sustainable energy solutions. Their use in renewable energy storage supports the transition to green energy by providing a reliable and continuous supply of electricity. In addition, Lifepo4 batteries have a positive impact on the environment as they are non-toxic and have a longer lifespan. As we continue to work towards a greener future, Lifepo4 batteries will continue to play an important role on our path towards sustainable energy development.  
  • Considerations When Choosing Lifepo4 Batteries
    Considerations When Choosing Lifepo4 Batteries Jan 31, 2024
    Introduction:   Lifepo4 batteries have gained popularity as a reliable and efficient energy storage solution due to their safety, long lifespan, and high energy density. However, selecting the right Lifepo4 battery for your specific needs requires careful consideration. In this blog post, we will explore the key factors to consider when choosing Lifepo4 batteries, ensuring their safety, longevity, and long-term cost-effectiveness. Factors to Consider When Choosing Lifepo4 Batteries: When selecting Lifepo4 batteries, several factors should be taken into account. These include capacity, voltage, charge/discharge rate, and size. The battery's capacity should align with your energy needs, ensuring sufficient energy storage. Voltage compatibility is crucial to ensure compatibility with your system. Additionally, the charge/discharge rate should match the power requirements of your application. Finally, the physical size should be considered to ensure it fits within the available space.   Ensuring Safety and Longevity of Lifepo4 Batteries: Safety is a paramount concern when it comes to choosing Lifepo4 batteries. Look for batteries that have undergone rigorous testing, meet international safety standards, and have built-in safety features such as thermal protection and overcharge/over-discharge protection. It is also essential to properly handle, store, and install Lifepo4 batteries according to manufacturer guidelines. Additionally, regular maintenance and monitoring will help prolong the lifespan of the batteries, ensuring optimal performance throughout their usage.   Long-Term Cost-Effectiveness of Lifepo4 Batteries: While Lifepo4 batteries may have a higher upfront cost compared to other battery types, it's essential to consider their long-term cost-effectiveness. Lifepo4 batteries have a longer lifespan compared to traditional lead-acid or lithium-ion batteries, reducing the need for frequent replacements. They also require minimal maintenance and have higher energy density, resulting in more efficient energy utilization. It is crucial to evaluate the total cost of ownership over the expected lifespan of the battery to appreciate the long-term cost benefits of Lifepo4 batteries.   Conclusion:   Choosing the right Lifepo4 battery requires careful consideration of factors such as capacity, voltage, charge/discharge rate, and physical size to ensure compatibility with your energy storage needs. Additionally, prioritizing safety features and following proper handling and maintenance guidelines will guarantee the safe and long-lasting usage of Lifepo4 batteries. While the initial cost may be higher, the long-term cost-effectiveness of Lifepo4 batteries, along with their superior performance and efficiency, make them a worthwhile investment in your energy storage system.
  • The Application of Lifepo4 Batteries in Renewable Energy Systems
    The Application of Lifepo4 Batteries in Renewable Energy Systems Jan 24, 2024
      Introduction:   Renewable energy is becoming increasingly popular as we strive to reduce our carbon footprint and transition to a more sustainable way of living. However, reliable and efficient energy storage systems are crucial for the success of renewable energy initiatives. Lifepo4 batteries are a promising solution due to their safety, longevity, and high energy density. In this blog post, we will explore three specific applications of Lifepo4 batteries in renewable energy systems.   Lifepo4 Battery Application in Solar Power: Solar power is one of the most common forms of renewable energy today. However, one of the limitations to its wide-scale adoption has been the challenge of storing solar energy for later use, especially during periods of low sunlight. Lifepo4 batteries offer a reliable and long-lasting solution to this problem. These batteries have a high energy density, which means they can store a large amount of energy in a small space. Additionally, they are safe and have a long lifespan, making them ideal for solar power applications.   Lifepo4 Battery Application on Yachts: Yachts require a significant amount of energy to run all of the onboard systems. Traditional lead-acid batteries are commonly used, but they are heavy and have a short lifespan. By contrast, Lifepo4 batteries are much lighter and can last up to ten times longer than lead-acid batteries. They also require less maintenance, making them an attractive option for yacht owners. Additionally, Lifepo4 batteries can handle high discharge rates, making them suitable for high-powered applications, such as winches and motors. Lifepo4 Battery Application in RVs: RVs are becoming increasingly popular as a way to travel and enjoy the outdoors without sacrificing modern conveniences. However, RVs require a stable and reliable energy source to power all of the appliances onboard. Lifepo4 batteries are a great solution for this purpose. They are compact and lightweight, making them easy to install and move. They also have a long lifespan, making them an economical choice over the long term. Moreover, Lifepo4 batteries can withstand deep discharges, which is important for off-grid RV use. Conclusion:   Lifepo4 batteries offer an exciting solution to the storage of renewable energy. Whether it's in solar power applications, yachts, or RVs, Lifepo4 batteries provide a safe, reliable, and long-lasting energy storage solution. As the world continues to shift toward renewable energy, incorporating Lifepo4 batteries into the renewable energy infrastructure will undoubtedly play a significant role in achieving a more sustainable future.
  • The Relationship between LiFePO4 Batteries and the Development of Sustainable Energy
    The Relationship between LiFePO4 Batteries and the Development of Sustainable Energy Jan 17, 2024
    Introduction:  In recent years, there has been a growing global emphasis on the development of sustainable energy sources. As concerns over environmental preservation and the depletion of finite resources increase, the search for efficient and environmentally-friendly energy storage techniques has become paramount. One such technology that has gained considerable attention is the Lithium Iron Phosphate (LiFePO4) battery. This blog post explores the relationship between LiFePO4 batteries and the development of sustainable energy.  Advantages of LiFePO4 Batteries: LiFePO4 batteries offer several advantages over traditional energy storage methods, making them an ideal choice for sustainable energy applications. Their high energy density, long cycle life, and excellent thermal stability make them a reliable and efficient choice for storing renewable energy. Additionally, LiFePO4 batteries are inherently safe, with a reduced risk of thermal runaway and fire hazards compared to other lithium-ion batteries. Supporting Renewable Energy Sources:  LiFePO4 batteries play a vital role in supporting the integration of renewable energy sources, such as solar and wind power, into the grid. These intermittent energy sources produce variable outputs, which can be stabilized and stored using LiFePO4 batteries. By capturing excess energy during peak production and releasing it during periods of low generation, these batteries help balance the grid and ensure a steady supply of clean energy. Off-Grid Power Solutions:  In remote or off-grid areas, LiFePO4 batteries enable the efficient storage and utilization of renewable energy. They can power homes, communities, and even small industries in locations with limited or no access to traditional power grids. By reducing dependence on fossil fuels and enabling self-sufficiency, LiFePO4 batteries contribute to the development of sustainable energy systems worldwide.  Electric Vehicles:  The rapid growth of electric vehicles (EVs) is a significant driver in the development of sustainable energy solutions. LiFePO4 batteries are becoming increasingly popular for use in EVs due to their higher energy density, longer lifespan, and enhanced safety features. Their integration in electric vehicle technology is facilitating the transition from fossil fuels to clean and sustainable transportation.  Recycling and Environmental Impact:  Sustainability is not just about supporting renewable energy sources; it also involves responsible waste management and environmental protection. LiFePO4 batteries have significant advantages in terms of recyclability compared to other lithium-ion batteries. With their lower cobalt content and minimal toxic elements, LiFePO4 batteries have a reduced environmental impact and can be easily recycled, minimizing landfill waste and ensuring a circular economy for energy storage solutions. Conclusion: The development of sustainable energy systems relies heavily on efficient energy storage solutions, and LiFePO4 batteries are at the forefront of this revolution. With their numerous advantages, including high energy density, long lifespan, and enhanced safety features, LiFePO4 batteries are driving the shift towards cleaner and greener energy sources. Their integration into renewable energy grids, off-grid power solutions, and electric vehicle technology is contributing to a more sustainable and environmentally-friendly future. By choosing LiFePO4 batteries, we are embracing the potential for a cleaner and more sustainable energy landscape.
  • The energy revolution of lithium batteries replacing lead-acid batteries
    The energy revolution of lithium batteries replacing lead-acid batteries Jan 10, 2024
    1. Introduction With the continuous progress of science and technology and increased awareness of environmental protection, lithium batteries, as an environmentally friendly and efficient energy storage solution, are gradually replacing traditional lead-acid batteries as the industry's first choice. In this paper, we will discuss the prospects and advantages of lithium batteries instead of lead-acid batteries.   2. Introduction to lithium batteries Lithium battery is a kind of battery that utilizes lithium ions to migrate back and forth between the positive and negative electrodes. Compared with lead-acid batteries, lithium batteries have higher energy density, longer service life and lower self-discharge rate.     3. Advantages of lithium batteries 3.1 High energy density Lithium batteries have higher energy density, can store more energy, and provide longer use time in the same volume. This makes lithium batteries widely used in mobile devices and electric vehicles.   3.2 Long Life Lithium batteries typically have a longer lifespan than lead-acid batteries. They are able to withstand more charge/discharge cycles without loss of performance, thus reducing the need for more frequent battery replacement.   3.3 Lower self-discharge rate In contrast, lead-acid batteries have a high self-discharge rate and gradually lose energy even when not in use. Lithium batteries, on the other hand, have a relatively low self-discharge rate and are able to maintain storage for a longer period of time, making them suitable for long-term standby power application environments.   3.4 Environmentally friendly and recyclable Compared with lead-acid batteries, lithium batteries do not contain heavy metals and are more friendly to the environment. At the same time, the main components of lithium batteries (such as lithium, nickel, cobalt, etc.) have the value of recycling, which can realize the reuse of resources.   4. Application of lithium battery in various fields 4.1 Mobile devices Lithium batteries are widely used in mobile devices such as smart phones and tablet PCs. Their high energy density and long service life enable users to use portable devices for a longer period of time without frequent charging.   4.2 Electric Vehicles Li-ion batteries have become the preferred energy storage solution for electric vehicles. Their high energy density and fast charging capability enable electric vehicles to have longer range and shorter charging time.   4.3 New Energy Storage Systems With the popularization of renewable energy generation technologies, lithium batteries, as the core of new energy storage systems, are able to store electrical energy for use by manufacturers and users at times of peak demand, further improving energy utilization efficiency.   5. Conclusion As an environmentally friendly and efficient energy storage solution, Li-ion batteries have the advantages of high energy density, long life, low self-discharge rate and recyclability. It has a broad application prospect in the fields of mobile devices, electric vehicles and new energy storage systems. Therefore, the trend of lithium batteries replacing lead-acid batteries will become more and more obvious.
  • What's the difference between PWM controller and MPPT controller?
    What's the difference between PWM controller and MPPT controller? Jul 12, 2023
    1. What is a photovoltaic solar charge controller and the role of photovoltaic solar controller? Solar controller is called photovoltaic solar charge/discharge controller, which is an automatic control device to control the solar cell array charging the battery and the battery power supply to the solar inverter load in the photovoltaic power generation system. It can set the control conditions according to the charging and discharging characteristics of the battery to control the solar cell module and battery power output to the load, and its main function is to protect the battery and stabilize the working condition of the power station.   2. What are the classifications of common PV solar charge controllers? Photovoltaic solar charge controllers can be basically divided into five types: parallel photovoltaic controllers, series photovoltaic controllers, pulse width modulation photovoltaic controllers (PWM), intelligent photovoltaic controllers and maximum power tracking photovoltaic controllers (MPPT). Here we focus on PWM and MPPT. Eco-Worthy PWM solar charge controller Eco-Worthy MPPT solar charge controller 3. What are PWM and MPPT? PWM and MPPT are two different charging method controllers for solar charging, which can be used to charge batteries with the current generated by solar modules. Both technologies are widely used in off-grid solar systems, and both work well to efficiently charge batteries. Selecting a PWM or MPPT controller is not based purely on which charging method is "better", but rather on which type of controller will be most effective in your system.   PWM controller: Pulse-Width Modulation Pulse Width Modulation (PWM) refers to the control of analog circuits using the digital output of a microprocessor, a method of digitally encoding the level of an analog signal. Controlling analog circuits digitally can significantly reduce the cost and power consumption of a system. Many microcontrollers contain PWM controllers within them.   The figure below shows the PV panel access voltage and current on the left and the load voltage and current on the right; MPPT controller: Maximum Power Point Tracking (MPPT)   To understand the difference between PWM and MPPT charging, let's first look at the power curve of the PV panel. The power curve is important because it shows how much power the PV panels are expected to generate. The PV panel produces a voltage ("V") and a current ("I"). The voltage at which the maximum power is generated is called the "maximum power point". The MPPT will be tracked dynamically throughout the day, depending on the lighting conditions. p=U*I (P is the power generated by the PV panels). Comparison of usage scenarios: PWM controller: applicable to small solar PV systems, such as home lighting systems, small solar battery packs, etc. MPPT controller: applicable to large solar PV systems, such as solar power stations, agricultural irrigation systems, etc.   Advantages and disadvantages comparison: Advantages of PWM controller: Simple structure, low cost. Suitable for small systems, cost-sensitive scenarios.   Disadvantages of PWM controller: Lower efficiency, cannot fully utilize the maximum power of the solar panel. The efficiency is even lower when there is a large difference between the battery voltage and the solar panel voltage.   Advantages of MPPT controllers: Higher efficiency to fully utilize the maximum power of the solar panel. When the gap between the battery voltage and the solar panel voltage is large, the efficiency advantage is more obvious.   Disadvantages of MPPT controller: Complex structure, high cost. Suitable for large systems, the pursuit of efficiency scenarios.
  • The classification and application of different lithium batteries
    The classification and application of different lithium batteries May 11, 2023
    Lithium batteries are a type of rechargeable battery that uses lithium ions as the primary component of their electrochemistry. They have become increasingly popular due to their high energy density, long cycle life, and low self-discharge rate. There are several types of lithium batteries, each with its own classification and application.   1. Lithium-ion (Li-ion) batteries: These are the most common type of lithium batteries, used in a wide range of applications. They consist of a lithium cobalt oxide (LiCoO2) cathode, a graphite anode, and an electrolyte.   Applications: - Consumer electronics (smartphones, laptops, tablets) - Electric vehicles (EVs) - Power tools - Medical devices - Renewable energy storage systems   2. Lithium iron phosphate (LiFePO4) batteries: These batteries use lithium iron phosphate as the cathode material, offering a longer cycle life and better thermal stability compared to Li-ion batteries. They have a lower energy density but are considered safer due to their resistance to thermal runaway.   Applications: - Electric vehicles (especially for commercial and heavy-duty applications) - Solar energy storage systems - Uninterruptible power supplies (UPS) - Electric bikes and scooters   3. Lithium manganese oxide (LiMn2O4) batteries: These batteries use a lithium manganese oxide cathode, which provides a high power output and good thermal stability. They have a lower energy density compared to Li-ion batteries but are more environmentally friendly.   Applications: - Power tools - Electric bikes and scooters - Medical devices - High-power applications   4. Lithium nickel manganese cobalt oxide (LiNiMnCoO2 or NMC) batteries: These batteries use a combination of nickel, manganese, and cobalt as the cathode material, offering a high energy density and good thermal stability. They are widely used in electric vehicles and energy storage systems.   Applications: - Electric vehicles - Consumer electronics - Renewable energy storage systems - Power tools   5. Lithium titanate (Li4Ti5O12 or LTO) batteries: These batteries use lithium titanate as the anode material, providing a high cycle life, fast charging capabilities, and excellent low-temperature performance. However, they have a lower energy density compared to other lithium batteries.   Applications: - Electric buses and commercial vehicles - Grid energy storage - Emergency power systems - High-power applications   In summary, different lithium batteries have unique characteristics that make them suitable for specific applications. Factors such as energy density, cycle life, thermal stability, and environmental impact play a crucial role in determining the most appropriate lithium battery type for a given application.
  • Benefits of a Balcony Solar PV system
    Benefits of a Balcony Solar PV system Mar 17, 2023
    Are you tired of high electricity bills and looking for a sustainable solution? Look no further than a balcony PV system! This innovative technology allows you to harness the power of the sun and generate your own electricity, all from the comfort of your own balcony.   With a balcony PV system, you can enjoy a range of benefits, including:   Cost savings: By generating your own electricity, you can significantly reduce your monthly electricity bills. Plus, with government incentives and tax credits, you can save even more money.   Sustainability: By using renewable energy, you can reduce your carbon footprint and contribute to a more sustainable future.   Convenience: A balcony PV system is easy to install and requires minimal maintenance. Plus, with a battery backup system, you can ensure that you have power even during a blackout.   Increased property value: A balcony PV system can increase the value of your property, making it a smart investment for the future.   But don't just take our word for it - check out these stunning pictures of balcony PV systems in action: As you can see, a balcony PV system is not only practical, but it can also be a stylish addition to your home. So what are you waiting for? Contact us today to learn more about how a balcony PV system can benefit you and your home. Let us help you take the first step towards a more sustainable and cost-effective future.
  • Sizing suitable fuse for PV system
    Sizing suitable fuse for PV system Jul 12, 2022
    INTRO Properly sizing fuses for photovoltaic (PV) systems is critical for the safe, reliable and long-term operation of this renewable power source. Unlike typical electrical power distribution and control applications, fuses in photovoltaic systems are subject to unique conditions. Prolonged exposure to elements of the environment can produce abnormal ambient temperatures, which in turn affects fuse performance, conductor selection and sizing. Also, unlike traditional circuits which are normally sized based on continuous loads, PV modules produce continuous currents,leading to additional considerations when sizing fuses. Taking these conditions into account, a unique method for sizing fuses in PV systems is necessary. WHEN TO FUSE, WHEN NOT TO FUSE   The requirement to protect photovoltaic systems from overcurrent conditions is defined in Article 690.9(A) of the NEC. Fuses are required to protect cables and PV modules from line-line, line-ground and mismatch faults. The sole purpose is to prevent fire and safely open a faulted circuit if an overcurrent event were to occur. However, there are some situations where fusing is not required and is defined by the following: Single Series String (fusing not required) Two Strings in Parallel (fusing not required) Three or More Strings in Parallel (fusing required) Select suitable fuses for parts of the system   Normally, In a complete solar power system, the fuse can be added in between different components, such as from solar panel array to charge controller, controller-battery bank, battery bank-inverter. For each part of units, the fuse requirements can be diverse, the specific ratings depends on how many amperage comes from those units and wires. Solar Panel fusing Normally, those solar panels over 50 watts have 10 gauge wires capable of handling up to 30 amps of current. When you have more than 3 panels connected in parallel, each capable of up to 15 amps, then a short in one panel can draw all 40-60 amps towards that short-circuited panel. This will cause the wires leading to that panel to far exceed 30 amps causing that wire-pair to potentially catch fire. In the case of panels in parallel, a 30-amp fuse is required for each panel. If your panels are smaller than 50 watts, and use only 12 gauge wires, then 20 amp fuses are required. Parallel/Combiner Box fusing In a parallel system a combiner box is used that holds the fuses/breakers to each panel. When sizing this “combined” fuse/breaker, we must first determine the worst case current that will flow based on our specific panels. If we take the example 195 watt 12V panel from the introduction section, and look at the short circuit current (Isc), we see it is rated at 12.23 amps. The National Electrical Code (NEC) also requires that a 25% factor be added if the load is continuous, so the number grows to 15.28 amps per panel. If there are 4 panels in this parallel set, then the combined current can theoretically be as high as 61.15 amps. An 8 AWG wire set (minimum) from the combiner box to the charge controller in our example is enough, since it can handle 60 amps. A 60-amp fuse or breaker should be used in this case to protect this wire set. This also aligns with the maximum capacity of the charge controller selected. Charge controller to Battery Fuse/Breaker With a Pulse Width Modulated (PWN) charge controller, the worst-case amps flowing to and from the controller are the same, so the fuse and wire size can match. As an example, We recommend a 60-amp fuse/breaker for the 60A PWM charge controller, put it between the unit and the battery bank. Battery Fuse/Breaker to Inverter   The wiring and fusing from the battery to an inverter is critical because this is where the most current will flow. Similar to the charge controller case, the recommended wire and fusing should be obtained from the inverter manual. We have already prepared a fuse holder on its positive cable, which is able to hold 50 amps current. A typical 600-watt 12V pure sign wave inverter draws up to 50 amps continuously, in that case, a cable that capable of 55-60A is required, A 6 AWG wire is what you need at least.
  • Charging Guide of ECO-WORTHY Lithium Battery
    Charging Guide of ECO-WORTHY Lithium Battery Jul 12, 2022
    Charging and discharging batteries is a chemical reaction, but it's claimed that Li-ion is an exception. Li-ion batteries are influenced by numerous features such as over-voltage, Undervoltage, overcharge and discharge current, thermal runaway, and cell voltage imbalance. One of the most significant factors is cell imbalance which varies each cell voltage in the battery pack over time and hence decreases battery capacity rapidly.    How to charge ECO-WORTHY lithium battery You can charge your lithium iron phosphate batteries whenever you want just like your cellphone. Unlike lead-acid batteries, lithium iron phosphate batteries do not get damaged if they are left in a partial state of charge, so you don’t have to stress about getting them charged immediately after use. They also don’t have a memory effect, so you don’t have to drain them completely before charging. There are two methods for battery charging: 1. battery charger(mains power) 2. solar panel (DC power) The most ideal way to charge a LiFePO4 battery is with a lithium iron phosphate battery charger, as it will be programmed with the appropriate voltage limits. Most lead-acid battery chargers will do the job just fine. AGM and GEL charge profiles typically fall within the voltage limits of a lithium iron phosphate battery. Wet lead-acid battery chargers tend to have a higher voltage limit, which may cause the Battery Management System (BMS) to go into protection mode. This won’t harm the battery; however, it may cause fault codes on the charger display.   Li-ion Battery cell level and pack level control variables are needed to be maintained accurately for safe operation. These control variables are monitored and protected by the battery management system (BMS). BMS is an electronic device that acts as a brain of a battery pack, monitors the output, and protects the battery from critical damages. This incorporates monitoring of temperature, voltage, and current, failure forecast or prevention, and data collection through communication protocol for battery parameter analysis. Battery state of charge (SOC) is the percentage of energy currently stored in the battery to the battery nominal capacity. One of the important key functions of BMS is cell balancing. Of course, you can also use a solar panel to charge your ECO-WORTHY LiFePO4 battery, but please make sure to choose a proper controller, both PWM controller and MPPT controller are okay. And as an SLA targeted 12V panel makes about 18V at full-sun full-load, such a 12V panel will provide more than enough voltage under all practical light conditions. If you don't have a controller, you can connect the battery to the solar panel, too. The BMS inside will protect the battery most times.   But if there is a defect in the battery BMS, the battery will be damaged. The ECO-WORTHY Battery Management System (BMS) performs three primary functions: 1. It protects the battery pack from being over-charged (cell voltages going too high) or over-discharged (cell voltages going too low) thereby extending the life of the battery pack. It does this by constantly monitoring every cell in the battery pack and calculating exactly how much current can safely go in (source, charge) and come out (load, discharge) of the battery pack without damaging it. These calculated current limits are then sent to the source (typically a battery charger) and load (motor controller, power inverter, etc), which are responsible for respecting these limits. 2. It calculates the State of Charge (the amount of energy remaining in the battery) by tracking how much energy goes in and out of the battery pack and by monitoring cell voltages. This value can be thought of as a fuel gauge indicating how much battery power is left in the pack.   3. It monitors the health and safety of the battery pack by constantly checking for shorts, loose connections, breakdowns in wire insulation, and weak or defective battery cells that need to be replaced. Unless you like living on the edge, DO NOT BUY a battery without BMS! How to choose an ECO-WORTHY lithium battery charger? Can I charge my lithium battery with a lead-acid charger? Lithium batteries are not like lead-acid and not all battery chargers are the same. A 12V lithium battery fully charged to 100% will hold voltage around 13.3V-13.4V. Its lead-acid cousin will be approx 12.6V-12.7V. A lithium battery at 20% capacity will hold voltage around 13V, its lead-acid cousin will be approx 11.8V at the same capacity. So if you use the lead-acid charger to charge your lithium battery, it may not be fully charged. You can use an AC to DC lead-acid charger powered by mains power, as charge efficiency and duration are less of a concern, it must not have automatic desulfation or equalization modes. If it does, do not use it as there is a high chance of damage to the cells or battery. This can have a significant reduction in battery longevity. If it has a simple bulk/ absorption/ float charge profile, then it can be used to recharge the battery but must be disconnected once charged and not left in trickle charge/maintenance mode. It must also have a maximum output voltage of 13V-14.5V. When it comes to DC-DC chargers and solar controllers, you must change these to LiFePO4 specific models. Our ECO-WORTHY battery charging parameters consist of the following: ✹Bulk/absorb: 14.2V- 14.6V. ✹Float: 14.6V ✹Equalization: 13.6V- 14.0V   But it would be best for you to choose a specific lithium battery charger. We have designed our own battery charger, perfect for lithium, LiFePO4 battery charging. This device connects directly to the battery and is meant for single-battery charging. It’s great for those with trolling motor applications or those with battery systems connected in series. How to use the charger properly? Most LiFePO4 chargers have different charging modes, set them like this: battery type: LiFePO4 battery cells: 4S  C (current): 10A (e.g. 0.3C for 30ah Battery)   Set the charger’s output current to no greater than the ‘0.7C’ rating of the battery. A recommended charging current no greater than 0.5C will help to maximize the lifespan of the LifePO4 battery. Battery bank charging/ Separate charging ECO-WORTHY battery has a voltage limitation on battery BMS module, which allows a maximum of 4 batteries in series connection. And no limitation for parallel. If you charge connected batteries together, it may cause that one battery to be fully charged and the other one not, because the BMS will cut off the current when detecting one high voltage when a single one is full. E.g. 2*30AH batteries are not full when they get to one customer, the capacity and practical voltage varied when they got disposed of in the warehouse, one is 13.2V (70%), the other is 12.9V (20%). The customer got them wired in series, and used a suitable charger to charge them together, after a while, the display revealed full capacity status when it detected one of the batteries got the 13.6V voltage, so the charging process was accomplished, and the charger cut off the current to the pack to avoid over-charging. But actually, the other 12.9V battery was not fully charged after the current got off, so when the customer use the battery bank, he found that the capacity did not reach his expectation, because the total output power gets limited by the low voltage one. So we recommend you get one charging balancer. Or just charge them separately. If you found that the battery bank's total capacity could not reach what it should be after charging the pack to full voltage, you could disconnect the batteries, and test the voltage of each, to verify if some of them did not get fully charged in the process. Can I charge lithium batteries in the cold? Lithium batteries rely on chemical reactions to work, and the cold can slow and even stop those reactions from occurring. Unfortunately, charging them in low temperatures is not as effective as doing so under normal weather conditions because the ions that provide the charge do not move properly in cold weather. There's one hard and fast rule: to prevent irreversible damage to the battery, don't charge them when the temperature falls below freezing (0°C or 32°F) without reducing the charge current. Because the lithium batteries suffer from a phenomenon of lithium metal plating on the anode if charged at high rates in cold temperatures. This could cause an internal short of the battery and a failure.   Please look at the following table to see the relationship between the voltage and temperature. Can I leave the ECO-WORTHY lithium battery on charging all the time? For a lithium battery with a low maintenance charging procedure and battery management system, it's perfectly fine and better than leaving them discharged for a long period. Regardless of whether it is a dedicated charger or a general charger, under normal conditions, it has a charging cut-off voltage, which means that it will stop charging at a certain volt. The same is true for the solar panel controller, and the controller can also be configured like this. The solar panel is directly connected for charging. If there is a problem with the BMS, it may be overcharged. Can I recharge my lithium battery from my vehicle alternator? Yes, but not necessarily to full charge, because most Alternators are adjusted for the lower voltage requirements of the vehicle Lead/Acid Battery (approximately 13.9V). Lithium Batteries require 14.4 to 14.6 Volts to fully charge. That being said, you can get up to approximately a 70% charge, depending on the depth of discharge and distance driven while recharging from your vehicle alternator.   It’s best to use a DC to DC charger, which helps protect and extend the life of your RV battery and not overload your vehicle alternator. Most DC to DC charger models have the same three-stage charging modes, and they will safely charge the battery and prevent alternator damage.  
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