FoxESS Community - Owners & Installers Forum

Dave Foster wrote: ↑Sat Sep 20, 2025 1:09 pm You don’t need to worry about the minimum 10%, the BMS will take care of that and maintenance charge it at a slow rate if it gets that low - note occasionally you may see it drop to a number like 7% before the BMS starts the charge, this isn’t a problem - in a multi-pack battery stack it simply means the BMS is re-calibrating the bottom based on the cell voltages of all batteries.

So for - 0030-0530: force charge to 100%
You should set start 00:30 - 05:29 Force Charge, minSoC 10%, maxSoC 100%, FDSoC 10%, FDPwr 5000W

For - 0530-2230: self work mode (charging from solar and selling excess to grid)
You should set 0530 - 22:29: Self Use, minSoc 10%, MaxSoC 100%, FDSoC 10%, FDPwr 5000W

For - 2230-0030: force discharge to 15%
You have to split this across midnight as you cannot span midnight (i’ve assumed you want to discharge at 5000 watts but you could probably reduce that to 3000W which would be easier on your batteries)

You should set 22:30 - 23:59: Force Discharge, minSoc% 10%, maxSoc 100%, FDSoc 15%, FDPwr 5000W
Then 00:00 - 00:29: Force Discharge, minSoc% 10%, maxSoc 100%, FDSoc 15%, FDPwr 5000W

So all of that together (in time order) -

00:00 - 00:29 Force Discharge, minSoc% 10%, maxSoc 100%, FDSoc 15%, FDPwr 5000W
00:30 - 05:29 Force Charge, minSoC 10%, maxSoC 100%, FDSoC 10%, FDPwr 5000W
05:30 - 22:29 Self Use, minSoc 10%, MaxSoC 100%, FDSoC 10%, FDPwr 5000W
22:30 - 23:59 Force Discharge, minSoc% 10%, maxSoc 100%, FDSoc 15%, FDPwr 5000W


The reason i’m ending at xx:x9 it’s because the scheduler ends at xx:x9:59 and you don’t want to overlap with the next period.

Dave Foster wrote: ↑Sat Sep 20, 2025 3:56 pm It was in relation to your ‘I don’t want to drop my battery below 10% ever’ - the answer is leave your minSoC set to 10% and the BMS will make sure that it never drops below.