Inverter Model: H1-5.0-E-G2-WL
Inverter Serial Number: 605H5020629xxxx
Battery Model: Fox ESS 11kW Stack
Issue Description:
I am experiencing a persistent firmware state-lock bug on my Gen 2 single-phase system. When utilizing the Mode Scheduler for an overnight Forced Charge (02:00–05:00), the inverter fails to transition back into Self-Use mode once the time window expires.
Even when outside the scheduled time window, or when an explicit Self-Use block is programmed, the inverter holds the battery frozen (e.g., at 45%) and forces the property to import 100% of its load from the grid. This issue persists even after deleting the schedules entirely, requiring a full hard DC/AC power cycle to temporarily clear the register.
Also the battery will now not charge above 45%
Edit: I am using App v 2.2.17.. My inverter versions are: Master 1.57; Slave 1.04; Manager 1.43
Does anyone know if there is an easy fix. I have created a support ticket but dont know how long they will take to respond.
Thanks
Last edited by AlexPH on Fri Jul 10, 2026 7:20 pm, edited 2 times in total.
You may want to edit/include your firmware versions, this could help with replies.
Thanks for the nudge. have now included the versions
Firmware versions are ok, if you have any VPP or Octopus integration setup the inverter will do what that schedule says, but if you are controlling it yourself the best option is to start by going to the website and delete any visible schedules there.
In the app (or website) make sure that your MinSoc's are set to 10%, and your MaxSoc.
Then in the app set Self Use workmode, does that work correctly ?
In the app (or website) make sure that your MinSoc's are set to 10%, and your MaxSoc.
Then in the app set Self Use workmode, does that work correctly ?
Hi Ok, thanks for the post. I have deleted the schedule on the web site and made sure that they are cleared from the app. I am using self User mode. I have switched off both the inverted and battery for 10 minutes.
In the Fox ESS app, I dont see any schedules, but if I look at the Energy Stats app, there is a schedule set of 00:00 - 23:59. Self Use. I dont understand that
Am I just unfortunate or is this a general problem?
In the Fox ESS app, I dont see any schedules, but if I look at the Energy Stats app, there is a schedule set of 00:00 - 23:59. Self Use. I dont understand that
Am I just unfortunate or is this a general problem?
No it’s the way the new Fox schedules work, it always creates a default schedule that runs in between the schedules so you always know what the mode will be between schedules.
One of the problems is it can be created with invalid min / max soc settings and you cannot get to it to change it.
As you have Energy Stats, go into the 00:00-23:59 and delete it, then save it, it will get re-created again next time you use the app/website but as long as your min/maxsoc settings are set correctly it should in future behave as you expect.
One of the problems is it can be created with invalid min / max soc settings and you cannot get to it to change it.
As you have Energy Stats, go into the 00:00-23:59 and delete it, then save it, it will get re-created again next time you use the app/website but as long as your min/maxsoc settings are set correctly it should in future behave as you expect.
No luck - the battery is still locked and let night I tried to increase the fore charge level to 90% to see if that would unlock the batter. I now have a battery, charged to 90% but I am still importing from the grid rather then using battery
Does the app show that it is measuring your house load correctly, that it is in Self Use workmode and both minSoc's are at 10% ?
Assuming it does - there a couple of things to check from the inverter screen, firstly that it is running - if you long press the 'tick' button and it says 'Stop' then it is running, either press the exit key or leave it for 10 seconds and it will return to normal. But if it says 'Start' then press the 'tick' button again, and the inverter will start up and run correctly.
At the inverter panel if you go into 'Settings' (password is 0,0,0,0), Battery, Max Dischg Cur - is that set to something sensible (like 40A)
Assuming it does - there a couple of things to check from the inverter screen, firstly that it is running - if you long press the 'tick' button and it says 'Stop' then it is running, either press the exit key or leave it for 10 seconds and it will return to normal. But if it says 'Start' then press the 'tick' button again, and the inverter will start up and run correctly.
At the inverter panel if you go into 'Settings' (password is 0,0,0,0), Battery, Max Dischg Cur - is that set to something sensible (like 40A)
Hi
Yes the house load is the same on the app and on the smart meter display. and again yes MinSOC is at 10%
The inverted screen shows OFF, so it is running, and Max Discharge Current is 40A.
The system has only been in about 10 days, so I am hoping that the installer can pop out and if needs be, chase FoxESS. I did Sumit a ticket on Friday morning, but I dont know how long they take to respond.
Yes the house load is the same on the app and on the smart meter display. and again yes MinSOC is at 10%
The inverted screen shows OFF, so it is running, and Max Discharge Current is 40A.
The system has only been in about 10 days, so I am hoping that the installer can pop out and if needs be, chase FoxESS. I did Sumit a ticket on Friday morning, but I dont know how long they take to respond.