Home batteries and backup power, as the datasheets state them
7 home battery configurations, 5 power stations and a runtime calculator for outages, each figure dated and linked to its source.
Home batteries by usable capacity
| Battery | kWh | kW | Warr. yr | Left at end |
|---|---|---|---|---|
| Generac PWRcell 2, M6 cabinet (6 modules) | 18 | 10.5 | 10 | 12.6 kWh |
| Fortress Power eBoost 16 | 16 | n/s | 10 | n/s |
| FranklinWH aPower 2 | 15 | 10 | 15 | 10.5 kWh |
| Tesla Powerwall 3 | 13.5 | 11.5 | 10 | 9.45 kWh |
| Enphase IQ Battery 10C | 10 | 7.08 | 15 | 6 kWh |
| Generac PWRcell 2, M3 cabinet (3 modules) | 9 | 5.2 | 10 | 6.3 kWh |
| Enphase IQ Battery 5P | 5 | 3.84 | 15 | 3 kWh |
kWh and kW as printed on the datasheet (Enphase 5P is kVA). Left at end is usable kWh times the warrantied percentage, our arithmetic. n/s: not stated in the document.
Data as of 8 Nov 2026, source: manufacturer datasheets and warranty PDFs, links on the batteries page
More data
Costs, incentives, power stations and the documents behind every figure.
Home battery cost
What a home battery costs installed, with the source and the date for each figure.
Read the cost guideBattery incentives
Programs that pay toward a home battery, each marked open or closed with the read date and a link to the official page.
See the incentivesPower stations
5 portable units from the manufacturer pages: Wh, AC watts, chemistry, cycles, solar input, weight, warranty.
Compare power stationsWarranties compared
Years, throughput limits and the capacity each maker promises at the end.
Read the comparisonSources
Every datasheet, warranty PDF and agency page used, with the day it was read.
Open the source listFederal credit status
Residential Clean Energy Credit (25D): 30% of qualified cost, property installed 2022 through 31 Dec 2025.
The IRS page states the credit is not available for property placed in service after 31 Dec 2025.
Battery storage: at least 3 kWh capacity (IRS wording).
The dated status, with what the IRS page says and does not say, is on the federal credit status page.
Data as of 8 Nov 2026, source: IRS, Residential Clean Energy Credit
Powerwall 3 or Enphase 10C?
Two batteries on the datasheet numbers, side by side, with the assumptions behind every derived figure shown.