Being from a ridiculously rainy region and having worked on solar thermal, I can warrant you that while it's not as functional when in bad conditions, it still

Being from a ridiculously rainy region and having worked on solar thermal, I can warrant you that while it's not as functional when in bad conditions, it still works. Consider it's usually set as a setup combined with a standard heating system (gas, electric...), and while there are situations where it can't handle the full load (absolutely horrible darker than night days) it'll always reduce or nullify costs. And since installation and maintenance are relatively cheap, it's always going to save you some money on the long run. Also consider some areas can be really hot, but have very cold water lines. I need to heat my water in summer despite being above 40ºC outside. Having solar negates that cost entirely, giving you like 9 months where you spend nothing in water heating. Considering how expensive gas/electric has become in this country, it's quite the relief for a wallet.