"Home battery backup" now covers a wide price range — from a large power station wired to a sub-panel for a few thousand dollars, to a full whole-home battery installation running well into five figures. Here's what drives the cost at each tier.
Cost by system type
| System type | Usable capacity | Typical installed cost |
|---|---|---|
| Large power station (wired in) | 2-5 kWh | $3,000 - $5,000 |
| Mid-size home battery (EcoFlow, Bluetti) | 5-10 kWh | $5,000 - $8,000 |
| Enphase or similar modular system | 10-15 kWh | $8,000 - $11,000 |
| Tesla Powerwall 3 (single unit) | 13.5 kWh | $10,000 - $13,000 |
See our Powerwall vs. alternatives guide for a closer look at the higher end of this range, including what pairs well with existing solar.
What moves the price beyond the battery itself
- Whole-home vs. essential-circuits coverage — backing up your entire panel needs meaningfully more capacity than a curated list of priorities
- Existing solar — pairing a battery with panels you already have is cheaper than installing both from scratch
- Inverter/panel compatibility — some batteries only integrate cleanly with specific solar inverter brands
- Labor and permitting — varies significantly by region and by whether it's a battery-only install or bundled with new solar
Don't forget the incentive side
Federal and state incentive programs can meaningfully offset these numbers depending on where you live and current program eligibility — see our rebates guide before finalizing a budget, since the effective cost after incentives is sometimes very different from the sticker price.
Before comparing quotes, size your actual essential-circuits load with our free wattage calculator — many households discover they don't need whole-home capacity to cover what actually matters during an outage.