Anyone else have this issue? My battery was at 34% at 23:30, then at 23:58, it suddenly dropped to 0% (not to 4% reserve, as if it had just run down), then started charging from the grid - I ended up staying awake as I couldn’t stop it charging from the grid (Since it wasn’t enabled in the app) until it reached 6%, then started discharging with load as normal. See attached screenshot for what I could pull from the logs - an undervoltage error, but I’ve not seen that completely 0 the battery before? There was no power cut in my area, and none of my clocks etc were affected, no circuits tripped out in the house. Is this some sort of stealth update, since I know those tend to drain the battery and recharge, a random error, or something I should get my installer to check out? Any help would be appreciated.
It does look like the 34% SoC battery percentage was inaccurate, especially with the reported battery voltages from 23:30 onwards, hence the sudden drop off in % SoC as the battery voltage dropped further (effectively to a low limit value which automatically sets the %SoC to 0).
If you can provide the inverter and battery model numbers and current firmware versions, it may be something that can be improved with new firmware updates.
There are many posts on this forum regarding inaccurate %SoC and the knock-on effects.
Hi Simon, I have a Gen 1 3.6KW Inverter (GIV-HY3.6) with firmware 449 and a Gen 1 5.2KW battery with firmware 3017
I charged it via mains during the British Gas Peaksave sunday (11am-4pm), and it was supposedly 100% long before 4pm, when it reverted back to eco mode.
Today is pretty cold, and I notice my battery temp is 11c - is it supposed to stay around 20c?
I had a look around on the old forum, only joined this one yesterday and saw 3 topics with the tag - thinking about getting another panel or some optimisers, so wanted to check whether the battery needed looking at whilst they’re here - thanks for your help!
The battery is up to date at v3017, but the Gen1 inverter is not. I have a Gen2 hybrid so have not been keeping track of Gen1 issues and firmware versions.
There is no mention of SoC adjustments in the official newer versions, so it may be there is a beta inverter version that helps.
Check on this forum for Gen1 hybrid %SoC issues.
Hi Simon,
Thanks for the information! Unfortunately I can’t find any way to update my inverter on the app, portal or that forum (the ‘update now’ prompt that was there for the battery around April this year has never shown for the inverter) - perhaps the other two versions are beta versions 