Cheapest time to charge a home battery
When to set your home battery to charge on Octopus Agile in London, for this time of year.
Charge from the grid in this slot; the rest of the day, let the battery run the house.
weekdays
About 15.6p/kWh
Got a second slot? Top up 12:30–14:30 (about 16.6p) to replace what the house uses in the morning.
weekends
About 9.4p/kWh
What it saves
12.7p for each kWh - charged at 15.6p and used instead of 30.0p in the evening - if the house uses the whole battery.
16.2p for each kWh - charged at 9.4p and used instead of 26.6p in the evening - if the house uses the whole battery.
Prices through the day
Charging 01:00–05:00 and 12:30–14:30
Charging 11:00–15:00
How this works
The cheapest stretch before the 16:00 peak in London's Agile prices for this time of year, long enough to fill your battery, at 90% round-trip efficiency. It assumes no solar and no exporting - the battery only covers your home's own use. A guide to a typical day, not a forecast.
Agile prices from the Octopus Energy API. Renewably isn't affiliated with Octopus Energy.