Just following up on this. My EMS was installed yesterday, so the system is now two AC3 inverters, each with two 9.5kWh batteries.
The batteries have been discharging as expected in line with the Discharge slots that I have set up, but I can’t get the batteries to charge. The time slots that I enter into the EMS are accepted but not passed to the inverters.
If I look at the individual inverter registers I can see that the discharge times are being updated to the values entered into the EMS. The times entered for charging slots are not being transferred.
I’ve tried setting the times, and the AC charge enabled flag, in the individual inverter settings but this does not cause the batteries to charge.
I’m down to 6% battery remaining now so I would like to get this working asap. I’ve had no joy in trying to contact GivEnergy via the AI ‘help’ assistant.
Of course, and I did speak to them. They advised that things can take a day or two to settle down so they wouldn’t intervene until that time had elapsed.
I wasn’t convinced that this was the case as there was nothing logged anywhere to say that something like a calibration was taking place, but it looks like it was!
Once the batteries had slowly depleted to 4%, through normal household consumption, it then became possible to have the batteries charge, so all good now.
It does seem that it is noticeably slower to react to changes in demand than the previous single inverter setup, which I guess is to be expected. [quote=“geoffrey, post:22, topic:2433, full:true”]
You had new GivEnergy kit installed yesterday and it’s not working.
Surely your first port of call is your installer? He installed the kit, your contract is with them, sale of goods act, etc etc
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Interesting behaviour. I should have thought about a calibration being done because that’s what happens when you install new batteries on an inverter, the inverter needs to determine the SoC/voltage range by doing a full discharge then a full charge and it would make sense that the EMS needs to do the same.
Curious that the battery drain to empty was with house load, the EMS didn’t force a full rate discharge which is what ‘normal’ inverters do. I can see why you thought it wasn’t working. Good to hear it is now running correctly
EMS - thanks to someone at PredBat online I tried a calibration on one of the inverters. The problem was that whilst one inverter would charge to 100% the other would only get to 92%. The problem inverter has two batteries - 9.5 plu a 5.2. It’s been running for 18 hours so far, both batteries are at 100%, still no end.
What is the correct procedure for calibrating an inverter on an EMS system? Secondly - how can I stop/kill it?
I started the calibration at 22:00 last night - it did nothing until the timed charge period started at 23:30.