I have an odd problem with my AIO which I have been unable to get GE to respond to, so I raise it here to see if others have experienced it. I have no solar, charge to 100% overnight from the grid and discharge to home during the day, nice and simple.
The attached graph shows my AIO discharging normally down to 44%, then mid-evening plunging down to 6% on very small load.
I see this behaviour every few days, and I suspect the issue is that the AIO wasn’t really fully charged overnight although reporting 100%.
It’s running the latest software. I note that there have been no software updates for some time, and worry that GE have moved on to new products and lost interest.
Does anyone else see similar behaviour?
This has been covered lots of times, what you are seeing is SoC crash. The AIO realises it doesn’t have the state of charge it thought it had, and rapidly corrects itself. As you’ve said this occurs without significant house load; and it generally happens in the lower half of the SoC range.
Upgrading to the latest firmware is a good step, what you should do now is to run a battery calibration which will re-teach the inverter what full and empty are. You can initiate this yourself from the portal.
When the calibration is running you can alter the charge and discharge rates and I have heard advice that doing a calibration at a slower rate can lead to a better result.
Thanks for your response, Geoffrey.
It makes sense that what I’m seeing is an SoC crash. What puzzles me is that the AIO loses track of SoC every few days, despite charging to full every night, which should make it easy.
I have have calibrated before and not noticed any significant difference. I will try your suggestion of charging at a slower rate.
You said that ‘This has been covered lots of times’. Can you help me find the previous correspondence on this topic?
When you say " running latest software", what versions are you seeing on the portal?
Inverter Firmware Version D0.616-A0.616 and Battery Firmware Version 12.
So theres the thing. The latest firmware is 620/13 AIO, GW is 14. This for some unknown reason is not being pushed by GE. Perhaps its to do with support levels. If you go to the community via the portal and look for the post " when to recalibrate" there are detailed instructions. Still have it on my to do list.
The Dashboard is not offering me any updates. Where did you find evidence for B13?
I tried asking Chat-GPT “Why are home batteries so much worse at SoC estimation than EVs?”
This is part of the answer:
If an EV suddenly thought it had 40% charge left but collapsed to 6% mid‑journey, it would strand drivers and destroy trust. EV makers have invested heavily to avoid exactly that. Home batteries, by comparison, often lag behind in SoC accuracy.
…
Tesla’s Powerwall benefits from EV‑grade battery management: advanced algorithms, structured calibration, and hidden buffers. GivEnergy’s AIO uses simpler methods, making it more vulnerable to sudden SoC corrections.
No as I said dashboard is not offering updates. If you read the other forum post you will see the process for downloading and installing it. You need to be a bit tech savvy but user ‘duplada’ sets out the steps to take. Here is the data sheet link, https://givenergy.co.uk/firmware-revisions/all-in-one-inverter/
It is supposed to help with SOC control, but as I have not done it yet I cannot confirm.