Is this a known firmware issue? I've tried updating a couple of times today but each time hit a timeout at 72% with the inverter disappearing from the app/web (although front panel suggested everything was normal) and needing a full power down & restart to reappear.
I noticed this today (yesterday's data) but looking back it seems to be fairly consistent. Each time I hit a FD period, the PV drops to around 140W (from an expected 2.7-3.3kW on yesterday's figures) with pretty much all the export and load coming from the battery. Apart from anything else, that's over £1 revenue lost each day (first world problems, I know).
Is this a known firmware issue? I've tried updating a couple of times today but each time hit a timeout at 72% with the inverter disappearing from the app/web (although front panel suggested everything was normal) and needing a full power down & restart to reappear.
Is this a known firmware issue? I've tried updating a couple of times today but each time hit a timeout at 72% with the inverter disappearing from the app/web (although front panel suggested everything was normal) and needing a full power down & restart to reappear.
Yeah, I've just started noticing it with mine in the hot weather too. Doing exactly the same.
I believe you cannot charge your battery whilst you discharge? I'm fine with that, but I also notice the forced discharging battery runs the home at the same time as exporting. I'd rather the solar power continue running the home and all battery power going to the grid. As you say, we seem to be loosing money the way it is running.
The only thing I can think of is the H1 G2 inverter having a maximum Kw it can handle at any one time. So for instance, 3.6kw going to grid via inverter from battery whilst 3.4kw solar goes to home if cooking etc. via inverter too. Perhaps 7Kw at any one time is too much for it to handle so it shuts down solar whilst it discharges.
Then again, I've made more money in the last few days because of the heatwave, so I'm not complaining.
Would be nice to know reasoning behind it all.
v.1.55/1.73 are latest versions. You can update via app.
I believe you cannot charge your battery whilst you discharge? I'm fine with that, but I also notice the forced discharging battery runs the home at the same time as exporting. I'd rather the solar power continue running the home and all battery power going to the grid. As you say, we seem to be loosing money the way it is running.
The only thing I can think of is the H1 G2 inverter having a maximum Kw it can handle at any one time. So for instance, 3.6kw going to grid via inverter from battery whilst 3.4kw solar goes to home if cooking etc. via inverter too. Perhaps 7Kw at any one time is too much for it to handle so it shuts down solar whilst it discharges.
Then again, I've made more money in the last few days because of the heatwave, so I'm not complaining.
Would be nice to know reasoning behind it all.
v.1.55/1.73 are latest versions. You can update via app.
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"The only thing I can think of is the H1 G2 inverter having a maximum Kw it can handle at any one time"
Yes - this is an expected. But what I would expect to happen - and I believe used to happen before the flurry of app and firmware updates over the last year - is that the inverter uses the PV first before the battery for a Force Discharge just as it does for supplying the house load.
With a 5kW inverter and a 3kW PV input, that means a 5kW FD setting would (should) take 3kW from PV and 2kW from the battery. I cannot think of any situation in which someone would reasonably/regularly want to not use the PV. If you truly want to run the battery down then you'd either wait until the sun has disappeared, or you turn the PV off at the isolator.
See this breakdown from October. I was on Agile import / fixed export at the time so controlling it myself. There was a negative import price at 10.30 so I'd have been discharging leading up to it (https://agilebuddy.uk/historic/agile/2025/10/4). Given it's 7 months ago and I didn't know to pay attention at the time, I can't be definitive, but it does fit the data and illustrates my expectation as above.
FD is set at 5kW (on 5kW inverter). House load is 410W. That's being supplied by 2.7kW PV and 2.45kW battery. Contrasted to the current situation where the entire supply would be taken from the battery with PV shut off.
Anyway - Fox have updated the firmware to 1.55/1.73 this morning (self-service update failures being another story) and will investigate "if the issue still persists afterwards" so let's see.
Yes - this is an expected. But what I would expect to happen - and I believe used to happen before the flurry of app and firmware updates over the last year - is that the inverter uses the PV first before the battery for a Force Discharge just as it does for supplying the house load.
With a 5kW inverter and a 3kW PV input, that means a 5kW FD setting would (should) take 3kW from PV and 2kW from the battery. I cannot think of any situation in which someone would reasonably/regularly want to not use the PV. If you truly want to run the battery down then you'd either wait until the sun has disappeared, or you turn the PV off at the isolator.
See this breakdown from October. I was on Agile import / fixed export at the time so controlling it myself. There was a negative import price at 10.30 so I'd have been discharging leading up to it (https://agilebuddy.uk/historic/agile/2025/10/4). Given it's 7 months ago and I didn't know to pay attention at the time, I can't be definitive, but it does fit the data and illustrates my expectation as above.
FD is set at 5kW (on 5kW inverter). House load is 410W. That's being supplied by 2.7kW PV and 2.45kW battery. Contrasted to the current situation where the entire supply would be taken from the battery with PV shut off.
Anyway - Fox have updated the firmware to 1.55/1.73 this morning (self-service update failures being another story) and will investigate "if the issue still persists afterwards" so let's see.
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As I mentioned, I am already on the latest versions and getting the same results as yourself.
Could this then be Intelligent octopus flux getting their programming wrong?
I would come off it for 24hrs and play around manually, but as IOF is not currently available, I may not get to come back on.
Could this then be Intelligent octopus flux getting their programming wrong?
I would come off it for 24hrs and play around manually, but as IOF is not currently available, I may not get to come back on.
I believe you can unlink the inverter from Octopus. As per the FAQ:
"If you wish to regain control, you can 'disconnect' your battery from the settings in the app.
Please note: if you keep your battery disconnected for an extended period of time you may no longer be eligible for the product."
The same FAQ suggests they should only be discharging in the 4-7pm window though...
"If you wish to regain control, you can 'disconnect' your battery from the settings in the app.
Please note: if you keep your battery disconnected for an extended period of time you may no longer be eligible for the product."
The same FAQ suggests they should only be discharging in the 4-7pm window though...
I was also having issues with my RCD switch flipping power off and FoxESS came out to look at inverter. In a nutshell, I’m getting it replaced this coming Wednesday with latest firmware updates, so I will see if this issue also dissapears.
If not, I feel like leaving IOF and going to IOn NEXT Optimise tariff. Theirs is a new tariff piloted by customers and now out in beta. Looks at half hourly wholesale prices and gets you optimum savings through an AI assistant or something like that. FoxESS equipment works with this new tariff. I’m looking more into it this weekend.
If not, I feel like leaving IOF and going to IOn NEXT Optimise tariff. Theirs is a new tariff piloted by customers and now out in beta. Looks at half hourly wholesale prices and gets you optimum savings through an AI assistant or something like that. FoxESS equipment works with this new tariff. I’m looking more into it this weekend.
