Solar thermal hot water is a complete waste of money in this country
and will never pay for itself.
Might be worth it if you are rigging up something yourself from an old
radiator but otherwise forget the idea.
Save your money and buy more insulation.
What a load of rubbish!! We've been fitting Thermal Solar for the last 25 years here in Scotland, most of these systems have never, ever needed any repair of any kind!! Unlike your £13K+ PV systems pish poor performance & an inverter that'll pack in 5 years. Many homes with TS systems do not heat any water during Summer months and will pre-heat hot water all year round.
EV tube panels can be bought for under £400, it's as cheap as chips to install & a system that'll last a lifetime..............ROI is the best of any of the Greenwash products.
A thermal siphoning system has no moving parts, so nothing to break done, so only a poorly informed idoit would say 'it's a waste of money in this country'!!