Octopus Agile is a smart tariff that has different prices through the day. It has 30 minutes slots with prices roughly:
- higher prices than standard tariffs during the peak hours (16:00 till 19:00)
- lower prices overnight. Sometimes they can even be negative (i.e. get paid to consume energy)
- roughly in line with other tariffs during at other times.
Owning solar panels and batteries I can try to take advantage of these prices.
Empirically my 5kWh battery (from Growatt) can be charged/discharged at 3kW (down-rated to 2.16 kWh when it’s too cold). To fully charge form 10% it’s going to take about 2 hours. Storing energy in the battery incurs in losses
Putting the inverter in “Battery first” mode can help taking advantage of Octopus Agile. The AC charging setting toggles between these two behaviours:
- charge from AC, taking advantage of very cheap prices when it’s enabled.
- don’t charge from AC and don’t use energy from the battery when disabled. This mode helps saving battery charge to use it during the time window with peak pricing
More details on the operation modes.
It's possible to get an advanced warning. Source of truth is the demand flexibility service page from the national grid, also tracked on the Octopus forum. Source
Thanks for reading. Feel free to reach out for any comment or question.