I have set grid charge times flicked the enable button, hit “submit”.
It returns “Write failed”.
Once or twice I've managed to get it to stick, only to return to it later and find they've gone back to 00:00:00.
I get the impression that Fox, typical of many Technology corporations can't wait to push things out without proper training and support not only for the end user but in my experience, also installers themselves.
My installer had the same problem, managed to set it for me, similarly in a short time 00:00:00 again!
When you write data to the inverter it needs real time access to the datalogger, it needs a good quality wifi signal to do that - if you are experiencing random write fails it’s most likely your wifi signal is poor at the datalogger; a signal booster or repeater will resolve that.
In Fox Cloud 2.0 app, click Device at bottom, head to Accessories tab and you will see the datalogger signal strength.
I have 3 out of 4 bars, signal strength does not equal signal quality, but it's a rough guide for you to look for.
As Dave above has said, you might need to use a Wi-Fi booster/repeater to improve the signal.
The only other choice is a home assistant setup hardwired in, but it's a more involved setup.
I have 3 out of 4 bars, signal strength does not equal signal quality, but it's a rough guide for you to look for.
As Dave above has said, you might need to use a Wi-Fi booster/repeater to improve the signal.
The only other choice is a home assistant setup hardwired in, but it's a more involved setup.
Thanks to both of you for your replies.
Although I couldn't find “accessories”, I found datalogger information under detailed parameters. Shows Signal strength “strong”.
My installers and Fox advising them were unable to explain why it was necessary to hardwire (Ethernet?) my A10 battery to a Wi-Fi extender. Foxes datasheet clearly states this unit has an antenna, built-in Wi-Fi and works dongle free.
My Rueter is on the floor of the room directly above the unit, plenty of signal yet at the expense of the installer they have connected it this way.
Regardless, I do have a good Wi-Fi Signal.
My problem with the App :
Under quick settings “grid charge setting” will not save.
Installer set it up remotely simply under "Mode schedule” to charge battery from grid between 2 am and 5 am to charge to a maximum of 100%.
Early this morning I found my battery to be at 10%, it was not charging, so I start the day on grid.
My installer has remotely set the mode scheduler, to charge the battery 2 to 5 am, and a Second command discharge back to the grid at peak time in the afternoon.
I have yet to see if this sticks today bearing in mind the winter sun may not get my PV to charge the battery up sufficiently, for a 4 pm discharge.
Bearing in mind the ’Note’ warning this setting will override Mode scheduler it seems to me "Grid charge setting” is not a necessary function at all. Instead we just use the mode schedule. What’s your View?
Many thanks,
Although I couldn't find “accessories”, I found datalogger information under detailed parameters. Shows Signal strength “strong”.
My installers and Fox advising them were unable to explain why it was necessary to hardwire (Ethernet?) my A10 battery to a Wi-Fi extender. Foxes datasheet clearly states this unit has an antenna, built-in Wi-Fi and works dongle free.
My Rueter is on the floor of the room directly above the unit, plenty of signal yet at the expense of the installer they have connected it this way.
Regardless, I do have a good Wi-Fi Signal.
My problem with the App :
Under quick settings “grid charge setting” will not save.
Installer set it up remotely simply under "Mode schedule” to charge battery from grid between 2 am and 5 am to charge to a maximum of 100%.
Early this morning I found my battery to be at 10%, it was not charging, so I start the day on grid.
My installer has remotely set the mode scheduler, to charge the battery 2 to 5 am, and a Second command discharge back to the grid at peak time in the afternoon.
I have yet to see if this sticks today bearing in mind the winter sun may not get my PV to charge the battery up sufficiently, for a 4 pm discharge.
Bearing in mind the ’Note’ warning this setting will override Mode scheduler it seems to me "Grid charge setting” is not a necessary function at all. Instead we just use the mode schedule. What’s your View?
Many thanks,
Do you have picture of your quick settings page / grid charge and mode scheduler for us?
Information is key to helping out.
Information is key to helping out.
Here are three screenshots .
Cheers
Attachments:
Can you post the graph for that same period so we can see the effect (swipe left on the home page, select the day and the graph is towards the bottom) - also if you could screen shot the home page (with the house on it) that shows the power flows please.
Just some advice for you.
During the discharge period, you have FD SoC at 60%, this will stop the discharge of the battery if you was pulling it down from 100%. So you will only drain 40% out to the grid for export. One other caution would be, if the battery was at 50% at the start of this period it would actually PULL power from the grid to bring it to the FD SoC of 60%.
In your charge period, you should set the power from 0W to 4000W, as it doesn't like the 0W settings.
I could be wrong on above points, but I am sure someone more expert can confirm this is right.
And if you can post up picture that Dave has requested, it can show what the battery is doing.
You could also test yourself if you say put electric oven on full with door open, and capture an image of your graph at this time (10 mins should suffice) This will show if the CT Clamps are running in the correct direction and the inverter can see the flow of power correctly.
During the discharge period, you have FD SoC at 60%, this will stop the discharge of the battery if you was pulling it down from 100%. So you will only drain 40% out to the grid for export. One other caution would be, if the battery was at 50% at the start of this period it would actually PULL power from the grid to bring it to the FD SoC of 60%.
In your charge period, you should set the power from 0W to 4000W, as it doesn't like the 0W settings.
I could be wrong on above points, but I am sure someone more expert can confirm this is right.
And if you can post up picture that Dave has requested, it can show what the battery is doing.
You could also test yourself if you say put electric oven on full with door open, and capture an image of your graph at this time (10 mins should suffice) This will show if the CT Clamps are running in the correct direction and the inverter can see the flow of power correctly.
Is this what you mean (graph)?
Since installation the battery has never been charged up, it's never been to 100%, in fact not even 60%!
0 - 4000W I don't understand this.
Unfortunately, I don't think my installer does either. In fact they have never mentioned what you said about being below the minimum charge of 60%.
During a ridiculously protracted two week installation when they struggled with all the technicalities, they were constantly speaking to Fox on the phone for guidance who largely didn't seem to solve anything.
For days of struggling they finally were advised by Fox to check the CT clamps you refer to.
I don't know how but finally a new CT clamp at least achieved a connection it did appear to be working, that is until they left me with the app. last Monday.
Yesterday the installer set the mode scheduler, 4-7pm discharge to grid, during this time it appeared to be drawing from the grid to charge the battery at peak rates!
Also it was set to charge the battery overnight from 2-5am, I happened to wake up around 4.30am. I looked at my phone and on the main screen was a notice saying “Scheduled Battery charging to finish 6.30am”.
6.30a.m. bears no relation to any of the settings!
Meanwhile the app showed the battery at 10%, where it remained until I got up hours later, once again starting the day with an empty battery.
Spoke with the installer who had been monitoring it overnight. To be perfectly honest he doesn't know what to do, once again he's going to speak with Fox.
Perhaps I;d get more sense out of the Fox in my back garden?
It will look like a graph when you see it.
Ah yes, I didn't think you to call that a graph.
I think this is what you're looking for
I think this is what you're looking for
Couple of other thoughts……. Man, I don't understand this!
Referring to your theory regarding minimum SOC and your FD SOC. Surely maximum SOC of 100% would permit it to charge fully?
It seems logical to set :
Minimum SOC 10%
FD SOC. 60% (in order to sell back 40%. Keeping the remaining 60% for self consumption during the evening)
But off peak it didn't pull power from the grid up to 40 or 60%.
During EXPORT period should it draw any more than specified Minimum SOC 10%?
During IMPORT period surely it should charge up to 100%?
With the battery at 10% why is it not importing early morning at all?(surely it should import up to SOC 100%?).
Referring to your theory regarding minimum SOC and your FD SOC. Surely maximum SOC of 100% would permit it to charge fully?
It seems logical to set :
Minimum SOC 10%
FD SOC. 60% (in order to sell back 40%. Keeping the remaining 60% for self consumption during the evening)
But off peak it didn't pull power from the grid up to 40 or 60%.
During EXPORT period should it draw any more than specified Minimum SOC 10%?
During IMPORT period surely it should charge up to 100%?
With the battery at 10% why is it not importing early morning at all?(surely it should import up to SOC 100%?).
Quick reply,
It looks like from your graph that everying is in order, the solar is producing and was feeding battery (charging)
The system was charging and discharging also, just not quite how you was expecting, this is solved by setting correct scheduler.
You are best to setup a full 24hrs of scheduler leaving no gaps, because what can happen is the last values "stick" so if you set say a 60% FD SoC value, after the time period has finished, the system will hold this value still. So it won't change this until your next timed event.
The 0 - 4000W I mentioned earlier, this is how the system decides on how much energy to import/export. So previously the 0W meant "Max" that the system can produce, now the value is literal, so leaving this at 0W means that it won't produce anything (at least this is how some systems are now behaving)
Maybe best question is what do you wish to achieve with your system, charge in cheap rate from hh:mm to hh:mm
Export from hh:mm to hh:mm
What do you want your system to do outside of this timeframe? For example do you want the battery to cover the house load from the battery?
It looks like from your graph that everying is in order, the solar is producing and was feeding battery (charging)
The system was charging and discharging also, just not quite how you was expecting, this is solved by setting correct scheduler.
You are best to setup a full 24hrs of scheduler leaving no gaps, because what can happen is the last values "stick" so if you set say a 60% FD SoC value, after the time period has finished, the system will hold this value still. So it won't change this until your next timed event.
The 0 - 4000W I mentioned earlier, this is how the system decides on how much energy to import/export. So previously the 0W meant "Max" that the system can produce, now the value is literal, so leaving this at 0W means that it won't produce anything (at least this is how some systems are now behaving)
Maybe best question is what do you wish to achieve with your system, charge in cheap rate from hh:mm to hh:mm
Export from hh:mm to hh:mm
What do you want your system to do outside of this timeframe? For example do you want the battery to cover the house load from the battery?
Thanks MB,
To be clear I want to import,charge the battery between 2 am 5 am (cheap rate).
Export, to grid between 4 pm 7 pm (Peak rate).
These are Octopus tariff hours.
I understand I now have to insert two more schedules for in between these times? One from 5am through to 4pm in the afternoon, also between 7 pm and 2 am the next morning in the Mode scheduler?
Is that right?
You have introduced a whole new ballgame. No one has suggested this, not my installer, not Fox.
This still appears to leave "Grid charge settings” (in quick settings) entirely redundant. Or do they have a purpose?
Thank you so much I'm going to discuss your suggestions with my installer. Fingers crossed.
I'll let you know how I get on…….
To be clear I want to import,charge the battery between 2 am 5 am (cheap rate).
Export, to grid between 4 pm 7 pm (Peak rate).
These are Octopus tariff hours.
I understand I now have to insert two more schedules for in between these times? One from 5am through to 4pm in the afternoon, also between 7 pm and 2 am the next morning in the Mode scheduler?
Is that right?
You have introduced a whole new ballgame. No one has suggested this, not my installer, not Fox.
This still appears to leave "Grid charge settings” (in quick settings) entirely redundant. Or do they have a purpose?
Thank you so much I'm going to discuss your suggestions with my installer. Fingers crossed.
I'll let you know how I get on…….
A can of worms has been opened indeed.
Grid Charge is for real basic operation, and limited to charging. We need it more advanced, so we are in full control.
I would go to your manual scheduler, and erase the existing two you have, swipe finger to the left on each and a Delete option appears. Once both are gone, you can start to add in the schedules by hand.
This below is my quick, rough 24hrs scheduler for you... now there are caveats and I could have some input numbers wrong.
I am assuming that outside of the discharge hours that you wish to use battery to cover the house load (save peak purchase) and that you are going to dump all of your battery in the export period... note that if you do try to reservere battery for evening, set G5 FD SOC to what percentage you wish to save for evening house load... also with the caveat that you may import energy in that time slot once the battery hits this reserve.
Grid Charge is for real basic operation, and limited to charging. We need it more advanced, so we are in full control.
I would go to your manual scheduler, and erase the existing two you have, swipe finger to the left on each and a Delete option appears. Once both are gone, you can start to add in the schedules by hand.
This below is my quick, rough 24hrs scheduler for you... now there are caveats and I could have some input numbers wrong.
Once again thanks for your help,
I'm still waiting to discuss with my installer today.
Meanwhile for the first time my battery actually charged up off-peak 2-5am this morning!!
This was dependent on the settings of the installer, they didn't program the whole day, as you suggested, they just programmed the off peak charge and the peak rate discharge (which I have yet to witness later today).
Question still remains, in quick settings, are grid charge settings any use at all?
In the app on this page there is confusing note - it ends saying : “When using the mode scheduler, any time set in “this" option will override other settings.
There are two ways of reading this. I have debated this with the installer.
Is “this option” referring to Grid charge setting (seems more likely)
Or Mode scheduler.
My view is “grid charge setting" appears to be for the user to override the mode scheduler. Installer doesn't agree with me?
Isn't this all so confusing? We could do with an accurate detailed, end user manual. Online I've not found anything that explains the content of all the pages.
I'm still waiting to discuss with my installer today.
Meanwhile for the first time my battery actually charged up off-peak 2-5am this morning!!
This was dependent on the settings of the installer, they didn't program the whole day, as you suggested, they just programmed the off peak charge and the peak rate discharge (which I have yet to witness later today).
Question still remains, in quick settings, are grid charge settings any use at all?
In the app on this page there is confusing note - it ends saying : “When using the mode scheduler, any time set in “this" option will override other settings.
There are two ways of reading this. I have debated this with the installer.
Is “this option” referring to Grid charge setting (seems more likely)
Or Mode scheduler.
My view is “grid charge setting" appears to be for the user to override the mode scheduler. Installer doesn't agree with me?
Isn't this all so confusing? We could do with an accurate detailed, end user manual. Online I've not found anything that explains the content of all the pages.
Glad to hear that you got the charge session in, just note the reason for the 24hr coverage is that the settings from slot 1 might persist on in some cases, so that when you expect the battery to discharge into house loads, it doesn't for example. However, you can see how this behaves today, and you can check the graphs to see if the home is drawing from the grid, when it should be using battery, only a few more hours and you will know.
I would recommend that you have a watch of videos that have been uploaded here, loads of information, and you will get to grips with it in no time at all.
https://www.youtube.com/@iameccles/videos
I would recommend that you have a watch of videos that have been uploaded here, loads of information, and you will get to grips with it in no time at all.
https://www.youtube.com/@iameccles/videos
Thanks again,
A very enlightening video. Makes a lot of sense although it does go against a couple of settings I've been advised by the installers.
It's a learning curve, want to be shared with installers I think!
Cheers
A very enlightening video. Makes a lot of sense although it does go against a couple of settings I've been advised by the installers.
It's a learning curve, want to be shared with installers I think!
Cheers
Hi,
Having watched the video a couple of times I noticed he doesn't suggest programming the mode scheduler continuously, instead he sets separate charging slots and states that in between it will revert to the "Work Mode" state set in quick settings, “Self Use" for example.
As he runs through setting up the mode scheduler I notice he advises setting the MAX.AC Power for forced discharge at 5000.0W.
I have Fox A10 battery which according to their tech spec comes with "Inverter Capacity : 10.24 kWh LFP”.
To my layman's ears that suggests I 'could' set my maximum AC power for forced discharge at 10,000.0W.
Is that right? However, he does advise not necessarily to drive your system to the full. So I think I'll stick at 5000.0W.
Cheers
Having watched the video a couple of times I noticed he doesn't suggest programming the mode scheduler continuously, instead he sets separate charging slots and states that in between it will revert to the "Work Mode" state set in quick settings, “Self Use" for example.
As he runs through setting up the mode scheduler I notice he advises setting the MAX.AC Power for forced discharge at 5000.0W.
I have Fox A10 battery which according to their tech spec comes with "Inverter Capacity : 10.24 kWh LFP”.
To my layman's ears that suggests I 'could' set my maximum AC power for forced discharge at 10,000.0W.
Is that right? However, he does advise not necessarily to drive your system to the full. So I think I'll stick at 5000.0W.
Cheers
Taken from the video
10:32 So, if we've got a 5 kW
10:35 inverter, we're we've got 5,000 W worth
10:38 of charge. So, we're going to do 5,000.
10:41 If you've got a 6 kW inverter, we'll set
10:43 that to 6,000, 7,000, etc. for for the
10:46 larger inverters. So, you can match this
10:48 number to the size of your inverter if
10:52 you want the fastest speeds possible.
So it's optional to input whatever rate you wish to covert from your battery (DC) to AC
For me personally, I would set the rate to the maximum, which in my case is 7000 W of conversion, but it's your system and you can control it how you like of course.
I am not 100% sure what a Fox A10 battery is, it might be AIO meaning "All-in-One" where you have a battery and inverter in a single unit, in which case, I think the inverter capacity might be 6000W.
As for filling the 24hr scheduler, if it works with just 2 slots and behaves fine, then leave it like that.
I have myself had it ignore the global work mode that has been set, and your Min SoC etc. So it doesn't behave like expected.
Only advice I can give, is try what you have setup, and then look at values when in/out of the time periods to see if it is behaving as you think it should. You have the graphs where you can look and see what is happening and see energy in/out of system during these time slots.
10:32 So, if we've got a 5 kW
10:35 inverter, we're we've got 5,000 W worth
10:38 of charge. So, we're going to do 5,000.
10:41 If you've got a 6 kW inverter, we'll set
10:43 that to 6,000, 7,000, etc. for for the
10:46 larger inverters. So, you can match this
10:48 number to the size of your inverter if
10:52 you want the fastest speeds possible.
So it's optional to input whatever rate you wish to covert from your battery (DC) to AC
For me personally, I would set the rate to the maximum, which in my case is 7000 W of conversion, but it's your system and you can control it how you like of course.
Inverter Capacity : 10.24 kWh LFP <-- This is actually how much energy is stored in your batteryLoxford wrote: ↑Fri Nov 28, 2025 10:48 pm I have Fox A10 battery which according to their tech spec comes with "Inverter Capacity : 10.24 kWh LFP”.
To my layman's ears that suggests I 'could' set my maximum AC power for forced discharge at 10,000.0W.
Is that right? However, he does advise not necessarily to drive your system to the full. So I think I'll stick at 5000.0W.
Cheers
I am not 100% sure what a Fox A10 battery is, it might be AIO meaning "All-in-One" where you have a battery and inverter in a single unit, in which case, I think the inverter capacity might be 6000W.
As for filling the 24hr scheduler, if it works with just 2 slots and behaves fine, then leave it like that.
I have myself had it ignore the global work mode that has been set, and your Min SoC etc. So it doesn't behave like expected.
Only advice I can give, is try what you have setup, and then look at values when in/out of the time periods to see if it is behaving as you think it should. You have the graphs where you can look and see what is happening and see energy in/out of system during these time slots.
Hi MB,
You've been incredibly helpful, very much appreciated.
I have learned a lot from you. The video link was particularly educational.
I am tending towards ignoring "Grid Charge Setting" and sticking to programming multiple instructions to cover a 24 hour period in the "Mode Scheduler". At least at this stage I have got thisto work without relying on the installer.
I may return to experiment with the Grid Charge Setting (I still don't really get it) in the future once I have confidence in my own programming.
I have learned so much more from yourself then my installer and their enquiries with the manufacture themselves.
May I ask, are you a professional perhaps in the installation side of the industry?
Are you connected with Fox?
Otherwise, an incredibly well informed end user?
Thank you
You've been incredibly helpful, very much appreciated.
I have learned a lot from you. The video link was particularly educational.
I am tending towards ignoring "Grid Charge Setting" and sticking to programming multiple instructions to cover a 24 hour period in the "Mode Scheduler". At least at this stage I have got thisto work without relying on the installer.
I may return to experiment with the Grid Charge Setting (I still don't really get it) in the future once I have confidence in my own programming.
I have learned so much more from yourself then my installer and their enquiries with the manufacture themselves.
May I ask, are you a professional perhaps in the installation side of the industry?
Are you connected with Fox?
Otherwise, an incredibly well informed end user?
Thank you
Hello again,
You are correct to move away from Grid Charge setting, as this will only ever allow charge and no discharge.
Thanks go to RussJH for sending you are more direct video to watch, I linked you to all the videos to browse through (highly informational) So you hopefully have this bookmarked to look at in future.
My only connection to Fox, is getting my own solar/battery back in tail end of February. It was a bit of a learning curve, along with learning the little interesting bugs along the way. I had a very strange one, where all of the settings in the scheduler were getting scrambled, turns out letting my adult son view the system on his phone would scramble things up.
I learned a lot myself, by making a setting change and making observations, when it did work or didn't work, I would make another change and see what happens.
Best of luck, and hopefully you have or will tame your system soon.
You are correct to move away from Grid Charge setting, as this will only ever allow charge and no discharge.
Thanks go to RussJH for sending you are more direct video to watch, I linked you to all the videos to browse through (highly informational) So you hopefully have this bookmarked to look at in future.
My only connection to Fox, is getting my own solar/battery back in tail end of February. It was a bit of a learning curve, along with learning the little interesting bugs along the way. I had a very strange one, where all of the settings in the scheduler were getting scrambled, turns out letting my adult son view the system on his phone would scramble things up.
I learned a lot myself, by making a setting change and making observations, when it did work or didn't work, I would make another change and see what happens.
Best of luck, and hopefully you have or will tame your system soon.