FoxESS Community - Owners & Installers Forum

I've got the Fox ESS system with H3 inverter installed about a week ago and was experimenting with the configuration.

My power provider has off-peak and peak periods and I would like to avoid drawing power from grid during peak period. My approach was to try to ensure that the battery has a certain SOC percentage just before the peak period starts.

What I found is that it is quite hard to achieve with the Fox Cloud 2.0.

I can use the mode scheduler to configure periods but:
- if I use "self use" period with a minimum SOC set to 50%, it will charge the battery but from solar only, not from grid, which might not be enough on the cloudy day
- if I use "force charge" period, there doesn't seem to be a way to set the limit SOC, it just charges to 100% regardless.

There is a setting called "Forced charge cutoff SOC" when the period mode is "force charge" but I cannot set it to anything but 100% - the app lets me to change it to anything I want and successfully submit, but if I check later it'll be set to 100% again.

What I'm wondering is - is this a known shortcoming? Is this a bug? Is there another way of achieving what I want?

vava wrote: ↑Sat Dec 27, 2025 10:21 am

I can use the mode scheduler to configure periods but:
- if I use "self use" period with a minimum SOC set to 50%, it will charge the battery but from solar only, not from grid, which might not be enough on the cloudy day
- if I use "force charge" period, there doesn't seem to be a way to set the limit SOC, it just charges to 100% regardless.

There is a setting called "Forced charge cutoff SOC" when the period mode is "force charge" but I cannot set it to anything but 100% - the app lets me to change it to anything I want and successfully submit, but if I check later it'll be set to 100% again.

What I'm wondering is - is this a known shortcoming? Is this a bug? Is there another way of achieving what I want?

If you set self use with minsoc at 50%, the battery will slow charge (at 5A DC) using solar, and if there isn't enough solar it should take it from grid - depending on your battery voltage 5A won't charge very quickly.

Using Force charge you need to set the maxSoC and FCSoC to be 50%, they are essentially the same thing on latest firmware but if you only set one, it will get overridden by the other.

Will has done a very good video that covers the various methods of charge and discharge, definitely worth a watch
https://youtu.be/L_AC_H4TPsQ?si=rsvQK9jp3r4uWcr-

I've tried that today, doesn't work the way I want it to work unfortunately.

My peak period starts at 3pm, so I've set a "force charge" interval from 14:30 to 14:59.
I've set all of the min SOC, max SOC and Force Charge Max SOC to 30%.

Note though that I've checked later and the Force Charge SOC was overridden to 100%.
Today was a relatively sunny day so the battery was charged from solar to almost 90% before force charge period started.

However, the force charge period still prioritised charging the battery, even though max SOC was set to 30% and the battery was almost full.
It looks like it was using just solar for that purpose but I would've liked it to actually use solar and battery to power the house at this point, rather than trying to get battery to a 100%.

Hi

Vava: Did you ever manage to resolve this ?

I have the same issue with my kh10 inverter and ep11 batteries. Id like to force charge overnight to say 80%, to leave some room for solar charging the following day whilst ensuring I have enough battery charge.
I set the max soc and force charge to 80%, save it and can conflicts saved ok. However at later point both settings get overwritten to 100%.

It's a bit frustrating, just wondering if anyone knows how to fix this ?

No, unfortunately I think this is how it works.

If you charging from the grid though you can control how much charge will be added using time - Force Charge will always charge at the maximum speed so you can time it to charge just a certain amount.

Not as nice as being able to say how much charge you'd like it to have at the end still.

Thanks for getting back to me, ok, I guess a blend of timed force charging and slow charging via "self use", with a high soc setting will have to do.
Best regards
Paul