![]() However, they have a higher upfront cost. Lithium iron phosphate (LFP) – LFP batteries have a longer lifespan, are safer and more efficient, and use less-toxic materials than NMC batteries, making them easier to recycle. Lead-acid batteries are a cheaper but less efficient alternative. Look for a battery with a maximum DoD of 90% or more.īattery chemistry – The two most commonly used battery types for residential use are lithium iron phosphate and nickel manganese cobalt, both based on lithium-ion chemistry. The higher the battery's round-trip efficiency, the less energy is lost in the storage and transfer process.ĭepth of Discharge (DoD) – The Depth of Discharge is the maximum percentage of the battery that can be discharged relative to its total capacity before recharging is recommended. Round-trip efficiency – Round-trip efficiency is the percentage of energy stored in the battery that may be retrieved later. Peak power is the amount of energy the battery can provide for a short time to handle the initial surge required by most large appliances.Ĭontinuous power is the amount of energy the battery can steadily supply. The higher the power output, the more devices and appliances it can power at the same time. Power output – The power output indicates how much power (kW) the battery can deliver all at once. ![]() Larger capacity batteries cost more but can power more appliances or provide backup power for a longer period of time. The following factors impact the cost of a solar battery:Įnergy capacity (kWh) – Energy capacity is the amount of power the battery can store and is the biggest factor in the battery's price. Solar battery prices System size / capacity
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