Gen3 Hybrid 3.6, with 2x Gen2 9.5kWh batteries; I updated the firmware on all of these last night, to inverter: 316 and batteries: 3022.
After updating, one of the batteries started reporting its ‘Calibration Capacity’ as 126Ah, down from ~180Ah, and well below the original factory capacity of 186Ah! This means it’s ‘lost’ a third of its capacity.
Nothing else has changed, and everything was working absolutely fine until the firmware update this morning (version 3020 previously).
What could have caused this? How can I ‘revert’ back to the previous capacity? Do I need to run a full calibration, and if so, should this be run with both batteries powered on, or just the affected one?
Restart the inverter. I have this on one of my 9.5’s After an update the capacity appears reduced but an inverter restart usually fixes it
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Thanks!
Where exactly were you seeing your reduced capacity, via the Inverter Monitor Android app, as per my screenshot above?
Inverter card on the dashboard
Ah, that does not show the ‘Calibrated Capacity’ value. You can only see this using the Rubikcube Monitor for GivEnergy Inverter app or by querying this value via GivTCP/Home Assistant.
I did have givtcp installed, stopped using it. But for me the calibrated cap also dropped by a third. IF this works with the EMS device I will test it once i get home
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Thats interesting, the full cap has fallen like that.
Yes a calibration will recalculate that as it sits at 100% and keeps going, counting the KWh going in.
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Thank you, I will schedule a calibration via the portal this weekend.
Is it best to run the calibration with both batteries connected and turned on, or one at a time?
Thanks, will report back. EDF have conveniently granted me 12 hours of free leccy this Sunday, so it’s a good opportunity to run a calibration or two!
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Calibration has been running for a few hours now, still discharging at 340W even though both batteries are now at 41V….
Is this normal? Will they recover without intervention?
seems to have put both to 190Ah+
So it worked
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Yep, both at a ‘good’ calibration level, but after calibration finished the primary battery SoC plummeted to 0% immediately, and the secondary was giving crazy temp readings!
I’ve just manually power cycled everything, and the primary is now showing 30%, with secondary at 70%, both at same voltage… so definitely doesn’t appear to be ‘balanced’!
Worth running another calibration overnight?
Tried running a ‘top end’ calibration, now the inverter sees a very low battery voltage (8V), and sits idle, refusing to use the batteries… Battery capacity in the portal is also now shown as a single 9.6kWh, this changed twice in the logs…
Batteries not usable currently. Have tried power cycling the inverter via the breakers. Really wish I hadn’t updated the firmware!
All seems to have settled down now, after many hours of calibrations and manual power cycles.
Both batteries now showing near-factory calibrated Ah capacities, and are close to each other in % SoC and voltage. What a ride!
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No idea mind, the issues seen as a direct result are very low indeed.
But when batteries do drop off, the Firmware does handle it quite well and gets them back online over a much wider range. Then if you set inverter idle, you can actually see by watching the cells, the higher one charging the lower one
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