FoxESS Community - Owners & Installers Forum

I've started seeing some really odd behaviour from my H1 (less than a year old but abandoned by Fox as previous gen). It's set to force charge during the Intelligent Octopus overnight period, but with a limit of 90% during the summer. What's happening is that it's charging at 5kW to 91%, supplying the house load until it falls to 90%, then charging briefly back to 91% throughout this period.

"Force Charge from Grid" is on during this period so I'd expect it to be drawing from the grid completely, not the battery.

Genuinely no idea why it's started doing this. I've attached the data from Home Assistant (it doesn't do this if the charge limit is 100%).

Master: 1.64
Slave: 1.02
Manager: 1.71

I'm not sure whether it's always done it this way but it definitely does now - Force charge when it hits MaxSoC falls back to Self Use and so the battery will be used for that short period before the SoC falls below MaxSoC when it will repeat the charge.

The old 'Charge Periods' were much more predictable as they used the Inverters default MaxSoC setting, whereas the schedules use a scheduler specific MaxSoC setting plus the default position for scheduler is fall back to Self Use - only down side of the old charge periods is you can't use them and the scheduler at the same time.