Home batteries have become essential for solar homeowners who want backup power, time-of-use savings, and energy independence. We compared every major home battery on capacity, power output, warranty, cost, and real-world performance. Here are the results.
| Battery | Capacity | Power | Price (installed) | Warranty | Rating |
|---|---|---|---|---|---|
| Tesla Powerwall 3 | 13.5 kWh | 11.5 kW | $12,500 | 10 yr | 9.3/10 |
| Enphase IQ 5P | 5 kWh/unit | 3.84 kW/unit | $6,000/unit | 15 yr | 9.1/10 |
| LG RESU Prime | 16 kWh | 7 kW | $14,000 | 10 yr | 8.9/10 |
| Franklin WH aPower2 | 15 kWh | 10 kW | $12,000 | 12 yr | 9.0/10 |
| SolarEdge Home Batt | 9.7 kWh | 5 kW | $9,500 | 10 yr | 8.5/10 |
| Generac PWRcell | 9-18 kWh | 9 kW | $15,000 | 10 yr | 8.2/10 |
The Powerwall 3 is Tesla's most powerful home battery yet. The integrated solar inverter simplifies installation and reduces costs. 11.5 kW of continuous power means it can run your entire home — including AC, EV charging, and kitchen appliances — during an outage.
Best features: Highest continuous power output of any single residential battery. Integrated inverter eliminates need for separate hardware. Tesla app provides real-time monitoring and Storm Watch auto-charging before weather events.
Enphase's modular approach lets you start small and add capacity over time. Each 5 kWh unit works independently, so there's no single point of failure. Stack up to 4 units (20 kWh, 15.36 kW) for whole-home backup.
Best features: Industry-leading 15-year warranty. Modular design — start with one and add more later. No single point of failure. Works with any solar system (not just Enphase microinverters).
Franklin Whole Home is the newcomer that's disrupting the market. At $12,000 for 15 kWh and 10 kW, it's the best value per kWh of any premium battery. The 12-year warranty splits the difference between Tesla (10) and Enphase (15).
If your main goal is keeping lights, fridge, and WiFi on during outages: Enphase IQ 5P (1-2 units). Affordable entry point at $6,000-$12,000, 15-year warranty, works with any solar system.
If you want to run AC, kitchen, and EV charger during outages: Tesla Powerwall 3. The 11.5 kW output handles high-draw appliances that other batteries can't.
If you're on time-of-use rates and want to maximize bill savings: Franklin WH aPower2. 15 kWh stores enough solar energy to avoid peak rates entirely, and the low price means faster payback.
Enphase IQ 5P is the most scalable. Add 5 kWh units as your needs grow — perfect if you plan to add an EV, heat pump, or pool.
| Battery | Installed Cost | After 30% ITC | Cost per kWh |
|---|---|---|---|
| Tesla Powerwall 3 | $12,500 | $8,750 | $648/kWh |
| Enphase IQ 5P (x2) | $12,000 | $8,400 | $840/kWh |
| Franklin WH aPower2 | $12,000 | $8,400 | $560/kWh |
| LG RESU Prime | $14,000 | $9,800 | $613/kWh |
Important: Home batteries qualify for the 30% federal tax credit when installed with a solar system. Standalone batteries (no solar) may also qualify under IRS guidance, but consult a tax professional.
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