Home Battery System · Battery (LiFePO4)
FranklinWH aPower 2
The Powerwall alternative that installers experienced with FranklinWH speak highly of. One cabinet holds 15kWh - the most storage per unit of any mainstream battery - with 10kW continuous and a 15kW/10-second surge rated to start a 5-ton air conditioner. Price shown is typical installed cost with the aGate controller ($12,000-20,000 depending on market). Because it's AC-coupled, it retrofits onto any existing solar inverter brand - the single biggest reason people pick it over Powerwall 3. The aGate handles whole-home transfer plus generator and even EV-as-load integration. The main owner gripe is that quotes vary widely between dealers. Expansion runs to a ridiculous 225kWh across 15 units.
10,000 W / 15,000 W surge · up to well pump or a small central AC
- capacity
- 15,000 Wh
- expands to
- 225,000 Wh
- Transfer switch
- transfer-switch ready
Best for Whole-home backup retrofits on existing solar where single-cabinet capacity and surge matter.