Largest usable capacity of our reviewed LFP batteriesīest Warranty Coverage: Tesla Powerwall 2 Lower round-trip efficiency than other models Benefits and Drawbacks Benefitsīetter-than-average end-of-warranty capacityīattery is exclusive to SunPower solar systems The average end-of- warranty capacity falls around 60%, placing the SunVault batteries at an advantage. The SunVault models have an end-of- warranty capacity of 70%, meaning they will maintain 70% of their outlined storage capacity when the coverage ends. Your warranty will end if your battery produces 38 MWh of energy or completes 4,000 full charge and discharge cycles before the 10 years. The SunVault Storage 13 includes a 38-megawatt-hour (MWh) throughput and a 4,000-cycle clause. These batteries also have additional stipulations that could end the warranty early. Most manufacturers include DoD ratings to protect the battery.Įach battery includes a 10-year warranty, which is standard for most solar energy storage options. DoD represents how much a battery can drain before shortening its life span. SunPower does not disclose the depth of discharge ( DoD ) for its battery storage units. While the SunVault ranks above this standard, its efficiency is still low compared to other reviewed batteries. Energy Information Administration (EIA), the average round-trip efficiency is 80%. LFP batteries have a longer life span and better safety features than other battery types.īoth SunVault batteries provide a round-trip efficiency of 85%, meaning they lose 15% of their power when charging. The 26 model is the largest lithium iron phosphate ( LFP ) battery in our review. The SunVault Storage 26 boasts a much higher 24-kWh capacity but maintains the same continuous power rating. Continuous power represents how much backup power a battery provides to your home. The SunVault Storage 13 offers a 12- kilowatt-hour (kWh) capacity and a continuous power rating of 6.8 kilowatts (kW). The company provides two battery options for residential installations. ![]() What we like: Known for its high-efficiency solar panels, SunPower offers an exclusive storage solution called the SunPower SunVault. Usable capacity : 12 kilowatt-hours, 24 kilowatt-hours.Availability: Exclusively through SunPower or its authorized dealers.Highest Usable Capacity: SunPower SunVault Batteryġ0 years, unlimited cycles, no throughput clauseġ0 years, 4,000 cycles, or 22.4 MWh throughput clauseġ0 years with a 5-year optional extension, 4,000 cycles (coverage varies by model)ġ0 years, 4,000 cycles, or varied throughput clause ![]() We’ll go into more detail in the sections below. Best Round-Trip Efficiency : Generac PWRcellīelow is a comparison of our top solar battery picks.Best Warranty Coverage: Tesla Powerwall 2.Highest Usable Capacity : SunPower SunVault.You can jump to it using this page’s table of contents at any time. Since solar batteries can be a complex subject, we’ve included a “Solar Battery Shopping” section below our brand recommendations with common terms and considerations. Our guide compares the six best solar batteries for residential homes and offers guidance on shopping for storage options. Our team spent more than 70 hours researching solar batteries from leading manufacturers and top solar panel companies. Pairing solar batteries with a high-performing system can boost your energy savings and extend your solar system ’s benefits. Solar batteries store excess energy generated by your solar power system for later use. However, when you buy something through our retail links, we may earn an affiliate commission. ![]() Affiliate Disclaimer: All products and services featured are independently selected by our editors.
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