I will also look at wiring in the emersion heater element so on shore power or genny power we have another option for heating water.
One thing that is also better is that I have taken out a lot of copper and replaced it with plastic, better for the winter frosts and the last method of insulation was the yellow loft insulation that was horrid, it is now all lagged with pipe insulation. I think I'll cover it with some of the bagged type loft insulation as a belt and braces approach.
Before and after pics below. Note the amount of copper......
I have also added an expansion tank (the red tank at the top of the pic) this will take the expansion as the water heats up. The old system did not have such and I expect the expansion was managed by the accumulator on the cold side as there did not seem to be a non return valve installed?
Now on to solar panels.........
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