I'm a big fan of Sunamp and have one of their heat batteries! https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html https://www.earth.

I'm a big fan of Sunamp and have one of their heat batteries! https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and-PV-diversion.html https://www.earth.org.uk/note-on-solar-DHW-for-16WW-UniQ-and...