Hi. I have an array of solar pv panels which work great. ( with out immersun on in jan to March I got 160 gbp income from feed in tariff.
When I enable my immersun device which uses Excess generated power to heat the water via the immersion heater ( esp on less sunny days) it seems the water never reaches “hot” whereas it gets to “hot” with a short 30 min boost on the boiler.
So … my q is this : I think the immersun outputs a range of power levels depending on available power (not sure if it is throttling current or voltage levels or both). So what effect does this have on the immersion heater? I am wondering if it quite simply will use up all the generated energy and never get to hot as the immersion element itself is at a low temperature. In which case I could use all power forever and the water never signals”hot”.
Wondering if i might be more effective doing my 30 min boiler boost and then exporting excess energy to the grid on the feed in tariff. Or disable immersun unless a really sunny day when I get the highest power output.
Anyone got any thoughts or data on this and how immersion elements behave at different power levels?