I did a series towards the end of last year, detailing the kinds of equipments I thought might be appropriate to add to an enapter based solar installation. I got to part 4, but stopped short of detailing battery and panels, because this part is critical, limiting system capability, and developing so rapidly, there is a risk we've no sooner stated the specification, and its already superseded, with the potential of folk then blaming me for jumping too early, paying too much, and getting too little.... so I am still holding off on part 5 for now :)
What I would say about emplying the HEG, is watch out for it limiting system capability, if only the electrical output of it is put to use, the 60% energy lost by heat, if it is not used, say in the household domestic hot water supply, and maybe some radiators or underfloor heating, could severely limiit the system capability. Another thing that might improve that is a heatpump, which would recirculate the heat energy in a way that it could be conserved, but again, more expensive hardware.
To me it looks like the best way to control switching the system between battery backup and HEG, given it is at least included in domestic hot water circuit, is to only use the HEG when more hot water is needed in the domestic hot water circuit, or if the battery backup is exhausted, given a reasonable amount of hydrogen could still be available after battery backup is exhausted.
ps sorry I don't have Enapter prices
