I recently signed-up for Octopus Energy Intelligent Flux. Until today, my 9.5kW battery was charging overnight to ~90% and discharging during the 16:00 - 19:00 period.
However, last night the battery charged up to 75% at 04:05 and then discharged all the way down to 0% at 11:13. The reserve for the battery is set to 4% and I’ve never seen it drop to 0% until now.
At the same time the inverter registered a BMS Under Voltage event.
Since this time the battery has been slowly charging at 285W and is now only at 28%. Is this Octopus Energy’s doing or is the battery reacting to the BMS Under Voltage event in some way?
Did it actually discharge to 0% or did the charge level (aka SoC) go to 0%
If it was a sudden drop to 0% or a gradual drop to 0% when the battery wasn’t actually discharging it could be a SoC drop. Check the discharge on the graph for the same period as the SoC dropped.
It might be that never charging to 100% means the battery system didn’t have as much energy as it thought it did.
Thanks for the reply. Not sure which are th SoC values in the Giv Energy Cloud dashboard. From the battery graphs under the inverter section the battery power level and battery percentage both drop gradually over time.
Today the battery continued to gradually charge at 288W until it hit 100% at 16:27. Interestingly I received a notification from the app that battery calibration was now complete at 16:19.
I never requested this so I can only assume either Octopus initiated a calibration or GivEnergy did.
The battery appears to be working normally. I’m unclear where I would find “SOC” info. On the cloud dashboard I can see from the Notifications section of my inverter that there was a BMS Under Voltage entry at 11:13 on 21/01/2025 when the battery hit 0% during the calibration.