Our current house has a solar water heating system put in by a previous owner.
Or rather, it has half a system. We have 8 large evacuated tubes on the side wall, a thermostatic mixer in the loft and a modulating combi boiler..
..but there is *no* preheat cylinder.
As far as I can see, this means the only benefit we get is that when we actually draw water the boiler gets really hot water from the underworked tubes (temperature limited by the mixer valve). So, not much help at all, really. No storage.
Has anyone else come across this setup? Is it worth fitting a dual coil cylinder to add some storage to the system? If so, can it go in the loft?
I've looked at the installation manual for the boiler and it can be set up to handle a cylinder as well as being used as a straight combi.