Britain doesn’t lack power, it lacks storage

We waste of renewable energy each year because we can’t store it, but when it’s not windy/sunny we need fossil fuels to cover the gap. Let’s change that - Kilowatt Club gives you:

£750 towards a battery and installation: £3,700 → £2,950
The Brain controls the battery, saving you £600–650 a year

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Charge cheap, power the peak

Green energy can be lucrative. The Brain makes your battery buy low and sell high:

Buys cheap renewable energy when it’s abundant
Powers the house during the peak, saving ~£400–450 a year
Exports energy when the grid needs it, earning ~£200 a year

Monday 6 October 2025: pay £1.02 for electricity vs £2.58 on a standard tariff

charging (cheap) powering the house half-hourly price standard tariff

Do I need solar?

No! Existing solar and wind across the country already produce cheap renewable surplus - so you can have a battery and no solar and just buy that surplus.

Projected savings

~£410/yrno solar

~£450/yrwith 4kWp of solar~10 panels

But if you already have solar a battery is a no-brainer!

Mission first

Our goal is to get a battery in every home. While we think our grant makes Kilowatt Club the most competitive way to do this, if you don’t want to join the club, please get a battery anyway. Some great options:

Octopus Energy
Tesla Powerwall
Predbat — an open-source controller for third-party batteries, similar to The Brain

£15/month

Cancel any time and the Brain reverts to a timer, still covering a lot of the savings.

Join our waitlist and you could have a battery in a month

Join