The future of energy storage depends on the push limit. We need battery solutions with greater capacity, higher power potential, longer service life, sustainable, safe and suitable for today's responsible consumers. Lithium ion batteries have become the first choice for grid connected solar backup systems, and we can easily understand why. However, with the progress of technology, there is a new technology revolutionary in the energy storage solution competition: lithium iron phosphate battery.
LiFePO4 uses chemicals similar to lithium ion, in which iron is used as cathode material. Compared with its lithium ion counterpart, LiFePO4 has many advantages. Let's explore the many reasons why LiFePO4 is the future of solar energy storage.
Battery life. LiFePO4 battery life is two to four times that of Li ion battery. Part of the reason is that LiFePO4 options are more stable at high temperatures, so they can resist overcharge. In addition, LiFePO4 batteries can store electricity for a longer time without degradation.
Longer service life is especially helpful for solar power generation, because the installation cost of solar power generation is high, and replacing the battery will damage the entire electrical system of the building. Solar panels and energy management systems currently have a service life of 20 or 30 years. After more cycles, the cells that can still maintain efficiency will better match the life of the whole solar system.
Impact on the environment. Unlike basic lithium-ion batteries, LiFePO4 batteries are made of nontoxic materials: iron, graphite and copper. They are easy to recycle and can even be used as new batteries. In fact, consumers who want to reduce the environmental impact can already use recycled batteries.
LiFePO4 battery has a longer service life, which naturally makes it more beneficial to the earth. Manufacturing new batteries consumes energy and resources, so the longer they last, the lower their total carbon footprint.
In addition, metal oxides in lithium-ion batteries have the potential to seep into the environment. Although it is intended to dispose of batteries safely, many batteries will still enter landfills, causing serious health problems to anyone nearby. LiFePO4 batteries contain phosphates instead of metal oxides, which greatly reduces the risk of environmental pollution.
Safety. The strongest argument that LiFePO4 battery is better than Li ion battery may be its stability and safety. In the application of solar energy, the battery is usually placed in the residence or near the high occupied office building, and the safety is an extremely important factor to be considered.
Because the energy density of LiFePO4 battery is lower than that of Li ion battery, LiFePO4 battery must be larger than Li ion battery to hold the same energy. However, the trade-off of space is that chemistry is significantly more stable at high temperatures. LiFePO4 batteries are actually nonflammable, even if not handled properly. Lithium iron phosphate batteries are less toxic and reduce the risk of allergic reactions, accidental poisoning and other medical hazards.
Discharge rate. Lithium iron phosphate battery also has the advantage of stable discharge rate. When needed, they can also discharge at a higher rate than lithium-ion batteries. This means that in the grid connected solar device, when the power supply is interrupted and multiple devices are all connected at the same time, the lithium iron phosphate backup battery will be able to handle the load without difficulty.
Lithium ion and LiFePO4 batteries are reasonable choices for solar power generation system, while LiFePO4 battery provides the best advantages for consumers and manufacturers. In the past 20 years, although batteries have made great progress, energy storage solutions must be solved to maximize the potential of solar energy in the market. LiFePO4 battery has longer shelf life, less environmental impact, higher stability, better performance and lower cost, which is the best way forward.
