I've ended up with a "hybrid" system, which (claims to) automatically choose which of gas and electricity is cheaper on a minute by minute based on COP derived from temperature. I have solar panels but not a battery. On net, it's ended up as roughly the same price as the old gas boiler. Better CO2 emissions but not that much cheaper.
It's not automatically linked to rate updates. There's probably a way of automating that for Vaillant systems?
(Shoutout to ProllyInfamous, who's been making the great point that in many climates HW systems that also cool and dehumidify are a great benefit. Not here at 56N, though)
It's not automatically linked to rate updates. There's probably a way of automating that for Vaillant systems?
(Shoutout to ProllyInfamous, who's been making the great point that in many climates HW systems that also cool and dehumidify are a great benefit. Not here at 56N, though)