Tesla Powerwall vs. Other Home Batteries: Which Is Best?

Home battery storage has become essential for California solar owners under NEM 3.0. But with multiple options on the market, how do you choose? Here's a straightforward comparison of the top home batteries available in 2024.

Tesla Powerwall 3

The Powerwall 3 is Tesla's latest home battery, released in 2024. It's the most significant upgrade in the Powerwall lineup — and it's the battery Pell Solar recommends for most installations.

Key specs:

• 13.5 kWh usable capacity
• 11.5 kW continuous power output (up from 7.6 kW on PW2)
• Integrated solar inverter — no separate inverter needed
• 25-year warranty
• VPP-eligible (earn money dispatching to the grid)

The integrated inverter is a game-changer. It eliminates a separate piece of equipment, reduces installation cost, and improves system efficiency. The 11.5 kW output means it can power your entire home — including HVAC and EV charging — during an outage.

Franklin iBX2

The Franklin iBX2 is a newer entrant with some compelling specs, particularly for homes that need more capacity.

• 13.6 kWh usable capacity (similar to Powerwall)
• 10 kW continuous power output
• Stackable — add multiple units easily
• 10-year warranty (shorter than Powerwall)
• Competitive pricing

The Franklin is a solid choice for homes that want to stack multiple batteries at a lower per-kWh cost. The shorter warranty is a consideration for long-term planning.

Enphase IQ Battery 5P

Enphase's battery integrates seamlessly with Enphase microinverter systems.

• 5 kWh per unit (stackable)
• 3.84 kW continuous power output per unit
• Works natively with Enphase microinverters
• 10-year warranty
• Modular — add capacity as needed

The Enphase battery is best for homes already using Enphase microinverters who want seamless integration. The lower per-unit capacity means you'll need multiple units for whole-home backup.

LG RESU Prime

LG's residential battery is a mature product with a strong track record.

• 9.6 kWh or 16 kWh options
• 5 kW continuous power output
• Compact form factor
• 10-year warranty
• Compatible with most inverters

The LG RESU is a reliable choice with a smaller footprint, but the lower power output limits its ability to run high-draw appliances during an outage.

Our Recommendation

For most California homeowners under NEM 3.0, the Tesla Powerwall 3 is the best choice. The integrated inverter, 25-year warranty, VPP eligibility, and 11.5 kW output make it the most capable and future-proof option. The higher upfront cost is offset by the integrated inverter savings and long-term warranty coverage.

For homes that want to maximize storage capacity at lower cost, the Franklin iBX2 is worth considering — especially when stacking multiple units.

Learn more about the Tesla Powerwall 3 →