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Daaah. Thank you for that!!! :oops:

Great. Thanks for that. Yes, the cylinder is a solar one with pockets for the thermostats. How do I "thank you"?

You are quite correct, of course; thank you for persisting until the penny dropped! My logic was totally wrong in wanting a low temp switch on. Finally realising that, as you say, I do not need an additional thermostat and any flexibility on water temperature could be achieved by altering the...

Thanks for that. Yes, the switch and brain system is the one in use currently. The only problem with it is the brain. The principal problem that I am trying to overcome is heavy use of water first thing in the morning depleting hot water before solar is effective. I take your point that the...

Firstly, thank you both for your replies. The thermostat: the immersion is half way up the cylinder while the proposed thermostat is at the top. The idea of the 2nd thermostat is to prevent the immersion coming on until the temperature has dropped to the prescribed level. ban-all-sheds - I am...

Hi. Yes, the temperature of the water. It is for DHW only.

Hi, thanks for that. The solar panels are really effective and deliver a good level of hot water. The immersion on the time clock is for when there is very high demand on hot water (it's a holiday let sleeping 6) and no input from solar - i.e. mainly early morning. Does that answer your queries?

Hi. I am wiring an immersion heater to be used in conjuction with a solar cylinder (i.e. to supplement the solar thermal panels when necessary). There is a fused spur and I propose to take the wiring to a time clock (which I assume wires just like a switch) and then to a thermostat - to switch...