I'm getting a battery soon so I can get paid £1/kWh to dump power at specific times with axle energy https://vpp.axle.energy/landing
They say £1/kWh is a Beta price, that makes sense as a way to burn investor money to get people interested. Their real price is TBD. Would you take 25p per kWh with a £5 per month guarantee ? That could be at least in the ballpark of working.
In the USA lots of early adopters of solar did so under net metering agreements where excess electricity is sold back at full price. After a number of years it was costing the utility companies too much money. So they updated the terms such that residents with solar buy electricity at retail prices (~$0.25) but sell it back at wholesale (~$0.04).
Not if you took out a $50k loan for an early gen solar system and it now only saves $30 a month.
My issue today is .. I cannot be paid market rate for giving back to the grid, even in hours when California needs the power.