Home battery statistics 2026
Updated 2026-10-01. Next scheduled update 2027-01-01.
Home batteries we track
Computed from the manufacturer datasheets of the 14 home batteries we track whose makers have not announced a discontinuation. 3 discontinued models are left out.
- Maximum warranty term
- 10 of 14 at 10 years, 1 of 14 at 12 years, 3 of 14 at 15 years
- Terms often end earlier at a throughput or cycle limit, and LG's 10 years requires registration (5 years standard).
- Cite: According to The Home Battery Report's home battery statistics (updated 2026-10-01), 10 of the 14 home batteries The Home Battery Report tracks whose makers have not announced a discontinuation list a maximum warranty term of 10 years.
- Built-in inverter
- 10 of 14 include an inverter
- Cite: According to The Home Battery Report's home battery statistics (updated 2026-10-01), 10 of the 14 home batteries The Home Battery Report tracks whose makers have not announced a discontinuation include their own inverter.
- Round trip efficiency (AC to AC only)
- Median 90 percent across 3 models
- 11 models are left out: their datasheets give a solar path, DC, module, cell, peak ("up to") or minimum ("over") figure, state no basis, or give no figure.
- Models counted: Enphase IQ Battery 5P, Enphase IQ Battery 10C, FranklinWH aPower 2.
- Cite: According to The Home Battery Report's home battery statistics (updated 2026-10-01), the median whole-system AC to AC round trip efficiency across the 3 home batteries The Home Battery Report tracks whose makers have not announced a discontinuation and whose datasheets state one is 90 percent.
Electricity rates, incentives and net metering by state
Computed for the 50 states (Washington, DC is not included). Rates are EIA average residential prices for July 2026, Electric Power Monthly Table 5.6.A.
- Average residential electricity rate, July 2026
- Median 16.1 cents per kWh, range 12.7 cents per kWh to 48.0 cents per kWh
- Highest: Hawaii 48.0 cents per kWh; California 33.6 cents per kWh; Maine 32.4 cents per kWh; Massachusetts 30.5 cents per kWh; New York 29.9 cents per kWh. Lowest: Louisiana 12.7 cents per kWh; Nevada 12.8 cents per kWh; Utah 13.1 cents per kWh; North Dakota 13.4 cents per kWh; Tennessee 13.7 cents per kWh.
- Cite: According to The Home Battery Report's home battery statistics (updated 2026-10-01), the median of the 50 state average residential electricity prices in July 2026 (EIA) is 16.1 cents per kWh; this is not the US average price.
- Statewide battery purchase incentive
- 10 of 50 states
- Counts a state run or state required cash rebate, grant or state income tax credit that a home battery qualifies for, open to general applicants now, for customers of every investor owned utility in the state. Tax exemptions, performance payments and voluntary utility programs not required by statute or commission order are not counted here; see the rule under Method.
- States counted: Arizona, Colorado, Connecticut, Delaware, Hawaii, Maryland, Minnesota, New Mexico, New York, Rhode Island.
- Cite: According to The Home Battery Report's home battery statistics (updated 2026-10-01), 10 of 50 states have a state run or state required home battery purchase incentive open on 2026-10-01 to customers of every investor owned utility (in Arizona and New Mexico only when the battery is installed as part of a new solar system).
- Net metering for new solar customers
- 18 of 50 states credit exports at or near retail, 27 of 50 below retail, 5 of 50 have no statewide rule
- Cite: According to The Home Battery Report's home battery statistics (updated 2026-10-01), 18 of 50 states have net metering that credits new residential solar exports at or near the retail rate, by The Home Battery Report's classification.
US market figures from other publishers
These figures are not ours. Each one is the publisher's own number, linked to its source.
- National residential solar-plus-storage attachment rate, Q1 2026
- 45%
- US residential, Q1 2026, up from 38% in Q1 2025. Source: Wood Mackenzie / American Clean Power Association, US Energy Storage Monitor (press release), published 2026-06-23, checked 2026-10-01.
- Quarterly figure, not annual.
- Cite: National residential solar-plus-storage attachment rate, Q1 2026: 45%, US residential, Q1 2026, up from 38% in Q1 2025, per Wood Mackenzie / American Clean Power Association, US Energy Storage Monitor (press release), as compiled in The Home Battery Report's home battery statistics (updated 2026-10-01).
- California residential storage attachment rate, 2024
- 57%
- California residential PV installs, 2024. Source: Lawrence Berkeley National Laboratory, U.S. Distributed Solar and Storage 2025 Data Update (Tracking the Sun), published 2025-10, checked 2026-10-01.
- Up from 14% in 2023. Other states combined rose from 5% to 8%.
- Cite: California residential storage attachment rate, 2024: 57%, California residential PV installs, 2024, per Lawrence Berkeley National Laboratory, U.S. Distributed Solar and Storage 2025 Data Update (Tracking the Sun), as compiled in The Home Battery Report's home battery statistics (updated 2026-10-01).
- Wood Mackenzie 2026 forecast for the US residential storage segment (metric not stated by the source)
- -5%
- US residential, 2026, a 5% contraction from 2025. Source: Wood Mackenzie / American Clean Power Association, US Energy Storage Monitor (press release), published 2026-06-23, checked 2026-10-01.
- Forecast, not a measurement: a 5% contraction from 2025. The March 2026 edition had projected a 2% contraction.
- Cite: Wood Mackenzie 2026 forecast for the US residential storage segment (metric not stated by the source): -5%, US residential, 2026, a 5% contraction from 2025, per Wood Mackenzie / American Clean Power Association, US Energy Storage Monitor (press release), as compiled in The Home Battery Report's home battery statistics (updated 2026-10-01).
- US residential storage installed in Q1 2026
- 1.3 GWh
- US residential, Q1 2026. Source: Wood Mackenzie / American Clean Power Association, US Energy Storage Monitor (press release), published 2026-06-23, checked 2026-10-01.
- Quarterly; up 86% year over year.
- Cite: US residential storage installed in Q1 2026: 1.3 GWh, US residential, Q1 2026, per Wood Mackenzie / American Clean Power Association, US Energy Storage Monitor (press release), as compiled in The Home Battery Report's home battery statistics (updated 2026-10-01).
Method and updates
- Usable capacity is not summarized as one number, because makers publish it for different configurations (a single unit, the smallest stack, or the largest stack), so a median would compare unlike things. Each model's own figure is on its page.
- Whole home versus partial backup is not summarized, because most datasheets do not state it.
- The battery set covers models whose makers have not announced a discontinuation. We could not confirm current US availability for the LG Home 8 and the BYD Battery-Box Premium HVS. We track the All Weather PowerPro WallMount; EG4 says the indoor version is leaving the US market.
- Statewide battery purchase incentive rule: a state counts when a cash rebate, grant or state income tax credit that a home battery qualifies for is run or funded by the state, or required of its investor owned utilities by statute or commission order, is open to general applicants now (an open income qualified budget alone does not count), and reaches customers of every investor owned utility in the state. Sales and property tax exemptions, performance payments and voluntary utility programs not required by statute or commission order are not counted. In Arizona and New Mexico the counted incentive applies only when the battery is installed as part of a new solar system. Customers of municipal utilities, cooperatives and public power authorities, such as Long Island's, may be outside a counted program, and some counted programs require enrolling the battery in utility dispatch for several years.
- Utility and local programs for each state are listed on its state page.
- Net metering class is judged for the main investor owned utilities' monthly kWh credit for new residential customers; annual excess payouts at avoided cost, fixed charges and charges on total production do not change the class; credits at or near the retail rate count as retail.
- Electricity rates are each state's EIA average residential price for July 2026. The median of the 50 state figures is not the US average price, which weights states by sales.
- Round trip efficiency is reported only for models whose datasheet states a whole-system AC to AC figure. Solar path, DC, module and cell figures, peak ("up to") and minimum ("over") figures, and figures with no stated basis measure different things and are left out.
- Depth of discharge is not reported because most datasheets do not publish it.
- The federal Section 25D residential purchase credit expired at the end of 2025 and is not counted as an incentive.
- Every figure is recomputed from our data files when the site is built, and the data is re-verified against its sources every quarter.
How we source and date data: methodology.
Questions
How many states offer a statewide battery purchase incentive?
10 of 50 states have a state run or state required home battery purchase incentive open on 2026-10-01 to customers of every investor owned utility (in Arizona and New Mexico only when the battery is installed as part of a new solar system). Counted programs are state run or state required rebates, grants or income tax credits open to general applicants. Utility and local programs for each state are listed on its state page.
How many home batteries use LFP chemistry?
10 of the 14 home batteries The Home Battery Report tracks whose makers have not announced a discontinuation state LFP or LiFePO4 on their own datasheet.
How many states still offer retail net metering?
18 of 50 states have net metering that credits new residential solar exports at or near the retail rate, by The Home Battery Report's classification.