Plug-in, installed or portable home battery?
The same sums as in the video Plug-In Home Battery in the UK: Is It Legal, and Does It Pay Back?, with your own numbers. Nothing you type leaves this page.
The short answer, on these numbers
On these numbers none of the three pays back over 10 years. The closest is the portable power station, £72 short.
Example maths using your numbers. Not financial advice. It leaves out interest and replacing parts, which would lower the result, and tariff changes, which could move it either way. Standby power is counted.Your numbers
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Result
How we got this number
These steps use the numbers you have set above and change as you change them. They are shown so you can check the maths.
What is fact, what is chosen, what is unknown
Data as of 31 October 2026. Online battery price: EcoFlow UK, read 31 October 2026. Standby: published test (about 11 W) and GivEnergy data sheet (under 5 W). Prices and tariffs change, so check your own. Found a mistake? See Corrections.
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