Q: Completely disagree with your re solar hot water panels;We’ve now had it for 12 months and have never ran out of hot water in a 2-family house with 6 residents.

A: If your hot water is entirely coming from your solar thermal panels then please let me know. Most solar thermal panel systems come with back-up electric heating element so that you never have cold showers even on bitterly-cold, sunless days in winter. So, it is possible that your year-round hot showers are created by using electricity in winter and not by using the sun’s heat.