Are home battery prices falling? What two years of official figures show
DESNZ has now published two full financial years of battery prices. They tell a more mixed story than 'batteries keep getting cheaper', and a much clearer one about how fast the market is growing.
Quick answer
Not across the board. Between 2024/25 and 2025/26 the median price per kWh of a home battery rose about 20% for batteries under 6 kWh, fell about 2% for 6 to 11 kWh and rose about 7% for 11 kWh and over (DESNZ). Over the same year the number of batteries recorded by MCS in existing homes rose 82%.
Prices per kWh, year on year
| Band | Median 2024/25 | Median 2025/26 | Change | Mean 2024/25 | Mean 2025/26 | Change |
|---|---|---|---|---|---|---|
| Under 6 kWh | £1,080 | £1,300 | +20% | £1,200 | £1,280 | +7% |
| 6 to 11 kWh | £910 | £890 | -2% | £890 | £870 | -2% |
| 11 kWh and over | £590 | £630 | +7% | £660 | £670 | +2% |
The only big move is in small batteries, and it is upwards. The median for the under-6 kWh band went from £1,080 to £1,300 per kWh; its mean rose less steeply, from £1,200 to £1,280. The middle band was close to flat. The large band rose by single figures on both measures.
DESNZ gives no reasons, and we would be guessing if we offered one. What we can say is what these numbers are not: they are not inflation-adjusted, they cover only batteries registered with MCS in existing homes, and they are statistics in development that DESNZ may revise when more installation records arrive. Treat a single year's change as a signal to watch rather than a trend to bank on.
Far more batteries, and bigger ones
The clearest change is volume. DESNZ's monthly sheet records 24,242 batteries in 2024/25 and 44,033 in 2025/26, an 82% increase. DESNZ itself notes that a rise in registrations may reflect more batteries being fitted, more of them being registered with MCS, or both.
The mix shifted towards larger batteries. Large batteries went from about a fifth of the price sample to over a quarter, and the average battery in the sample grew from 8.7 kWh to 9.6 kWh (our arithmetic: total capacity divided by batteries). Because larger batteries cost less per kWh, a shift in the mix like this can lower the typical price per kWh across the whole market even when no single band gets cheaper.
| Month | 2024/25 | 2025/26 | Change |
|---|---|---|---|
| April | 1,334 | 2,841 | +113% |
| May | 1,552 | 3,327 | +114% |
| June | 1,523 | 3,259 | +114% |
| July | 1,807 | 3,470 | +92% |
| August | 1,526 | 3,231 | +112% |
| September | 1,843 | 3,726 | +102% |
| October | 2,300 | 4,059 | +76% |
| November | 2,385 | 3,717 | +56% |
| December | 1,891 | 2,769 | +46% |
| January | 2,519 | 3,402 | +35% |
| February | 2,672 | 4,458 | +67% |
| March | 2,890 | 5,774 | +100% |
The monthly pattern repeats across both years: registrations climb through the autumn, dip in December, and rise again towards March. October and November were strong months in both years, and the final quarter of each financial year was the busiest. Whether that reflects when people buy or when installers register work, DESNZ doesn't say.
The figures also move after publication. DESNZ's cover sheet for the May 2026 release says some data for September 2023 to March 2025 was revised because more records were added to the MCS installation database. So the 2024/25 figures in this table are not identical to those published in May 2025. That is normal for statistics in development, and another reason to treat one year's change with care.
Batteries got a little bigger inside each band too. Dividing each band's total capacity by its batteries, the average mid-size battery grew from about 9.4 kWh in 2024/25 to 9.8 kWh in 2025/26, and the average large battery from about 15.0 kWh to 15.5 kWh; the small band barely moved, at about 5.1 kWh. Because price per kWh falls as size rises, a slightly bigger average battery within a band nudges that band's median per kWh down, which makes the small band's sharp rise more striking, not less.
March 2026 was the busiest month in the series, with 5,774 batteries recorded, double the figure a year earlier. December was the quietest month of 2025/26, with 2,769. The series starts in September 2023, when 405 were recorded.
What the trend means for a quote today
Three practical points follow from the figures.
- Use the current year's medians. A cost guide still quoting 2024/25 figures will understate small-battery prices by about £220 per kWh. Every price on this site uses 2025/26, and the methodology page explains how.
- Don't wait for prices to fall on a hunch. One band fell slightly, one rose slightly and one rose sharply. The next release, usually in late May, may show something different. Meanwhile the VAT on an installed battery is set to step from 0% to 5% on 1 April 2027; see VAT on home batteries.
- Compare within your band. Your quote should be set against the median for its size, not a market average. The quote checker does that, and the calculator shows how the price moves across sizes.
When the next figures arrive
DESNZ published the last two releases at the end of May (29 May 2025 and 28 May 2026). When the 2026/27 figures appear we will re-pull the workbook, update every price on this site and add a third year to this page. If you spot a newer release before we do, please tell us through the contact page.
Sources (page last reviewed 3 November 2026)
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