Re boiler18 May 2019 16:48
So if 3 boilers flat out, could produce 18kw
That would cost around £800 quid a year to buy from grid
The boilers wouldn’t be flat out 365 days a year and the cost of boilers + maintenance
Etc etc
I would guess it would save them 400 a year
With a outlay of £????? thousands x3 boilers
Rather pay the grid , than have 3 of these to go wrong .
Especially if they are made in Poland