Agile tariff here.
No heat pump.
No solar.
Battery car.
If you choose agile become competent in varying your demand. At the moment I’m heating my house for no reason other than negative pricing.
On agile I’d be manually controlling my heat pump. Turning it off and on when the prices drop and the prices increase. The heat loss would be minimal, I think?
Reduce the system temp by a few degrees?
Last April I used 480kwh of electricity and it only cost me £5 + standing charge of £0.50 a day. Max out when the power is cheap, suffer a little when the power is expensive.
Agile tariff is great. If you are willing to adapt to the daily changes.