Hi Jamieo, I found this post of yours while searching online for a solution to our solar PV / eddi / immersion heater problems. I'm in Dublin and from what I can tell, not being electrician or anything, we have the same set-up as you in our house (Solar PV powering an immersion dual element heater in a 40inch tall water tank etc), and there have been problems.
Specifically our immersion and convertor keep cutting out when we try use the convertor (eddi) to boost / heat the water from the grid on cloudy days/mornings/evenings, or when the eddi tries to heat the smaller element in the dual immersion (either from the gird or from the solar).
The only way the water heats now is when the sun is out and it's powering the larger element. as soon as it tries to switch to the other, the convertor cuts out. We never get a full tank of hot water and the eddi has to be reset each time. Crazy stuff.
It took us a while to realise it was the immersion at fault. The solar installers have been of very little help when contacted. We learnt to reset the immersion, but the button is stiff and unresponsive on ours (elemex) and it seemd to work only once or twice that way anyway.
I very interested to know, seeing as it's a year later. how you got on with your set up, what you decided on in the end. Did you get a new immersion element? if so does it work well, would you reccomend it?
Thanks for making this post.
