A smart battery saves you £600 per year
And is a key way the UK can move off fossil fuels
What the club offers
- We help you choose a supplier
- We pay half the battery/installation cost: £3,700 → £1,850
- We plug our Kilowatt Club Brain into your inverter to make the battery smart
Members save about £480 a year after £10/month membership.
Paying half is not financially sustainable for us long term - we’ll have to reduce that promise at some point, but for the first members we’re willing to take the hit
How the club works
We plan to repeat this cycle until every home in the UK has a battery - reducing our reliance on fossil fuels.
48h example
Our dynamic programming algorithm tries billions of different battery behaviours, and chooses the best. In this case it saves £12 vs standard tariff.
Import prices
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Export prices
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What the battery did, half hour by half hour
How long it takes to pay for itself
| Upgrade | Payback, years | 10-year profit |
|---|---|---|
| Kilowatt Club battery | 4.0 | £2,950 |
| Solar panels | 9–12 | −£800 to £1,700 |
| Heat pump | 7 | £1,800 |
Mission first
Our goal is to get a battery in every home. While we think we’re the most competitive way to do this, if you don’t want to join the club, please get a battery anyway. Some great options: