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I cabled mine with 10mm T+E, a 7kW heatpump would only take less than 10amps so its overkill for that (not in a bad way though), mine is a 14kW 13.8 amps when at 100%, inverter drive to the compressor is great for reducing the starting load to nothing.

About 1/3 of the heatpump power, my 14 kW runs at around 4kW on maximum load, it has an inverter so it's soft start etc. 14kW is at the higher end of domestic air-water heat pumps though.

Along with:

The ONLY thing I can see there which shouldn't have any issues are the AC charging slots, all at 00:00:00 to 00:00:00 they are enabled, I know AC charge is off but I wonder if there's a bug in the software and the 00:00:00 to 00:00:00 is 24 hr charging? I seriously doubt it but just for the hell...

,.. here's a short list of financial and industrial FUBARs from the EU then,.. (it was longer,OK much longer, but really tough reading. I have however edited this slightly due to those who have asked me to clarify some points. All of it has been fact-checked not only by myself but also many...

The sad truth is we actually make very little in the UK these days, the EU is substantially to blame for this funding manufacturing businesses to move out of the UK and setup elsewhere. Maggie had her cronies privatised most nationalised industries (telecoms, water, energy etc) with them ending...

I suppose it depends to what level you're assessing them. I don't believe the cells or the IC's and semiconductors are made in the UK, I suspect they 'assemble' the battery here as opposed to make the battery. MyEnergi have just made a substantial number of their workforce redundant which is...

Nice theory....... That is really odd behaviour, mine doesnt do that, I have the same battery with an SPH6000 inverter Mine will sit there seemingly for ever at the same SOC, it will not go below the discharge stop % Software update on the inverter? It's not acceptable and needs to be...

Awaiting to see what you find :)

I'm sure you'll be fine, it works incredibly well, fit it - set the voltages - click run and forget it. :)

No problem, always happy to help. Web portal https://server.growatt.com/index I prefer the above portal, the app is not so good, portal isnt brilliant but it is easier.

Hi David, The parameters for the BMS are communicated from the inverter:- The Load First - Discharge Stopped SOC being the one. If I switch AC charge off or the time window for AC charge, the inverter will not charge the battery no matter what teh SOC is.

My question though is how can it get below my shut off SOC i.e. my Growatt stops the battery at 10%, it's unable to discharge further, the BMS is protecting the cells. How can it continue to discharge? In round figure it would need to consume 210w of self discharge / BMS consumption to drive it...

How would that happen? Once it hits 11% the BMS switches it off. Having the inverter decide to charge the battery even though AC charging is switched off is a very bad idea, potentially dangerous.

Why is that a problem? Theyre not Seplos cells BTW theyre EVE cells. The SEPLOS BMS needs to see a full charge to 100% and then a full discharge to calibrate, it may as well be done at the same time the unit is commissioned. The whole thing about so called top balancing was pre the days of...