I really think Bulb E7 could work out better for me too. Do you know if Bulb will install an economy 7 meter?
They installed ours back in 2018 but I've heard they stopped doing it!
Am waiting for Bulb to reduce their electricity prices this year, as in the last 18 months E7 rates have gone from just under 7p per kWh to just under 8p per kWh.
Combined with our PW, our average electricity cost over the next 12 months should fall to just over 8p per kWh.
What may make switch to Go is if our solar PV can generate enough electricity to offset the 3 hrs of lost off peak rates on E7. Looking at home usage the 1hr between 630 to 730am when we get up consumes a reasonable amount of electricity, especially if you combine preheating for the car.