My late friend had solar water heating panels that he installed himself in 1983 - he swore by them. We said at that time that solar panels of some description and grey water systems should be fitted by law to new builds and major rebuilds - they would now be a fraction of the cost. Nearly forty years later it hasn't happened yet. Why haven't all units on industrial estates, train and bus stations etc. have solar panels on them instead of farm land being used?In the UK, we don't typically have the climate to get year round heating from solar water.
But it is inexcusable that panels are not mandated for all new build when the cost of installation must be a small fraction of the cost of retrofitting. As an original fitment I suspect they are wholly justified.
The government insist (rightly IMHO) that carbon neutral is the way to go yet do very little to promote the right behaviours.
I have 2 quibbles with that:In the UK, we don't typically have the climate to get year round heating from solar water.
Was it professionally installed? If so, they should have been able to prevent that problem. More an installer problem than a fundamental problem with the technology I would have thought.We had a 3 panel vacuum array that worked well but it was forever boiling dry so we sold it.