IOG will be much better in terms of use and cost especially if you export.
We have 3 EVs, 17 kWh in heat pumps, 19 kWh GivEnergy batteries and 5.6 kW of solar.
Last months bill was £4 and that includes octopus overcharging 23 kWh of peak electric, of 27 kWh peak use, which we didn’t use.
Ps...