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A home battery completes your solar investment. Without storage, you export surplus power at low feed-in rates and buy it back at full retail — often paying 3–5× more. Compare 9 home batteries by chemistry, capacity, cycle life, and price.
Largest Capacity
Sonnen
ecoLinx 30
30 kWh usable · LFP
Most Cycles
Sonnen
ecoLinx 30
15,000 cycles · 15-yr warranty
Best Efficiency
Tesla
Powerwall 3
97.5% round-trip efficiency
| Battery | Chemistry | Usable Capacity↓ | Cont. Power↕ | Efficiency↕ | Cycle Life↕ | Warranty↕ | Price↕ |
|---|---|---|---|---|---|---|---|
Sonnen ecoLinx 30 | LFP | 30 kWh | 8 kW | 81.6% | 15,000 | 15 yrs | $32,000 |
Generac PWRcell M6 | NMC | 18 kWh | 6.7 kW | 96.5% | 4,000 | 10 yrs | $16,500 |
LG Energy Solution RESU16H Prime | NMC | 16 kWh | 7 kW | 95% | 5,000 | 10 yrs | $13,500 |
FranklinWH aPower 2 | LFP | 15 kWh | 10 kW | 90% | 6,000 | 15 yrs | $11,000 |
Anker SOLIX X1 Energy Storage 15 kWh | LFP | 15 kWh | 6 kW | 96% | 6,000 | 10 yrs | $9,000 |
Tesla Powerwall 3 | LFP | 13.5 kWh | 11.5 kW | 97.5% | 6,000 | 10 yrs | $9,200 |
BYD Battery-Box Premium HVS 10.2 | LFP | 10.24 kWh | 10.2 kW | 96% | 6,000 | 10 yrs | $9,500 |
Enphase IQ Battery 10C | LFP | 10 kWh | 7.08 kW | 90% | 6,000 | 15 yrs | $8,400 |
Anker SOLIX XE Home Battery 7 kWh | LFP | 7 kWh | 5 kW | 96% | 6,000 | 10 yrs | — |
Best for: most residential use cases
Best for: space-limited homes, mobile applications
A typical US home uses 30 kWh/day. For overnight backup (6pm–8am), you'd need 10–15 kWh of usable capacity. Most home batteries are 10–20 kWh — one battery covers the average home for one night.
As of 2026, the US residential ITC has expired. However, several states offer battery-specific rebates — California's SGIP program offers ~$200/kWh for home batteries. Check our state incentives guide.
Total capacity is the battery's full storage. Usable capacity is how much you can actually use — most batteries keep 5–10% in reserve to protect battery chemistry. Always compare usable capacity, not total.
LFP is the better choice for most US homes. It delivers 3,000–6,000+ cycles (vs 2,000–3,500 for NMC), doesn't thermal-runaway, and qualifies under UL 9540A safety testing used by most AHJs. See our full LFP vs NMC guide.