A real installed-cost breakdown for a 10kWh lithium battery in Boston, using metro-level pricing rather than a state-wide average.
A 10kWh lithium (LiFePO4) battery — a common reference size for backing up essential circuits — costs approximately $7,862 fully installed in Boston in 2026. Equipment accounts for about 80% of that at standard installation complexity; the remainder covers wiring, a backup circuit or panel, and permitting.
| Line item | Estimated cost | Share of total |
|---|---|---|
| Equipment (battery + hardware) | $6,290 | 80% |
| Installation (standard complexity) | $1,572 | 20% |
| Total installed cost | $7,862 | 100% |
A 10kWh battery in Boston costs 14% more than the average across the 50 states we track ($6,900). That works out to $874 per usable kWh, accounting for the roughly 90% depth of discharge a lithium battery allows.
A 10kWh lithium home battery costs approximately $7,862 installed in Boston in 2026, with equipment making up roughly 80% of that and installation the rest.
A 10kWh battery in Boston costs 14% more than the 50-state average of $6,900.