Payback period for a home battery is how many years of bill saving it takes to cover the installed price. In the simple form it is installed price divided by yearly saving. It ignores inflation, tariff changes and the value of backup, so treat it as a planning figure, not a guarantee.
What it means for a home battery
Habo's worked example uses a 5 kWh EcoFlow STREAM at £2,499 fully installed on Octopus Go 12M Fixed GO-FIX-12M-26-10-14. Octopus Go needs an EV charged at home (Go terms clause 2.1.3). Re-checked on 28 October 2026 via the Octopus API, the product is still available (available_to is empty), the night rate is 9.4p, and the day rate runs from 35.293p (East Midlands) to 39.3081p (Merseyside and North Wales). With one full cycle a day, all used at the day rate, and an assumed 90% round-trip efficiency, the best-case yearly saving is about £453 to £527 (£453.49 to £526.76 before rounding). That is a best-case payback of about 4.7 to 5.5 years (£2,499 / £526.76 = 4.7; £2,499 / £453.49 = 5.5). See the homepage maths and how much a home battery can save.
Real payback is longer if you shift fewer kWh than a full pack each day, if you stay on a flat-rate tariff, or if the quote is larger than £2,499. Pair payback with warranty years and cycle life so the pack is still covered after it has paid for itself. The Energy Saving Trust also frames "is it worth it" around your tariff, usage and system cost rather than a single universal year count.
Run your own day and night rates on the savings calculator, then read is battery storage worth it. Related terms: kWh vs kW, usable vs total capacity, and the glossary. Habo's offer is an electrician-wired EcoFlow STREAM from £2,499. Join the waitlist.
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Frequently asked questions
Divide the fully installed price by the yearly saving on your tariff. Habo's best-case example is £2,499 divided by about £453 to £527, which is about 4.7 to 5.5 years. That Go maths needs an EV charged at home (Go terms clause 2.1.3).
No. It is an illustration. Real savings fall if you do not use a full cycle every day, if rates change, or if round-trip losses differ from the assumption.
Use Habo's savings calculator with your day and night rates, then compare the result with the warranty length on the quote.
Simple battery, simple install
Electrician-wired EcoFlow STREAM from £2,499. Habo will try to serve anyone who registers in an area where we have an electrician. Nothing to pay today.
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