Hi Guys
New to Fox Batteries.
Modes I have tried are self-use and feed-in-priority
Issue: Fox app shows all the PV generation is being used at home with a few watts going in or out of Grid. During no PV generation time (i.e. at night etc) PV and house load shows 0w. Battery and grid shows a few watts going in or out.
Battery: Almost always at 100%
Electricity provider shows plenty of feed in happening.
And a few kwh being consumed daily. I am suspecting these are being consumed at night and the battery is not powering anything at all.
Reading some online forums I have a feeling that CT clamp on mains is installed in the wrong direction but I could be wrong.
Any suggestions?
I have reached out to the installer too.
Can you post the graph from the app (swipe left on home page), it shows solar, battery, grid use and that will help show what is happening.
Helpful if you could also share any settings you have for minSoc, battery reserve and if you have any charge periods set.
Helpful if you could also share any settings you have for minSoc, battery reserve and if you have any charge periods set.
Hi Dave
Thanks for your response,
I have attached a screenshot from few days ago.
The settings are
Grid charge setting - not enabled
Batt Reserve capacity - 10%
Sys Min Soc - 10%
Mode - Self Use
Mode Scheduler - Disabled
Thanks for your response,
I have attached a screenshot from few days ago.
The settings are
Grid charge setting - not enabled
Batt Reserve capacity - 10%
Sys Min Soc - 10%
Mode - Self Use
Mode Scheduler - Disabled
Attachments:
Ok thanks, I don't think the problem is the CT facing the wrong way - it's not reading any grid power and just showing solar generation as load which is what you would expect if there was no CT fitted.
You may just want to get your installer back as it could be a setting or wiring fault,
But if you want you could first check in the inverter Settings to see whether the CT clamp has been enabled (it has been known to disable itself after a firmware update when newly installed). You can do that at the inverter panel, in Settings (password = 0,0,0,0), Feature, Meter/CT and check to see it is set to >CT<, if it isn't change it to say >CT< and press set - the inverter will restart and should hopefully start reporting.
Also worth doing a visual check on the wiring to the CT clamp itself which would normally be fitted to the live feed from the smart meter - it may have become unclipped and dropped off, and often the CT clamp cable is jointed in the meter cupboard - again one of the wires may have become loose.
You may just want to get your installer back as it could be a setting or wiring fault,
But if you want you could first check in the inverter Settings to see whether the CT clamp has been enabled (it has been known to disable itself after a firmware update when newly installed). You can do that at the inverter panel, in Settings (password = 0,0,0,0), Feature, Meter/CT and check to see it is set to >CT<, if it isn't change it to say >CT< and press set - the inverter will restart and should hopefully start reporting.
Also worth doing a visual check on the wiring to the CT clamp itself which would normally be fitted to the live feed from the smart meter - it may have become unclipped and dropped off, and often the CT clamp cable is jointed in the meter cupboard - again one of the wires may have become loose.
Thanks Dave
Appreciate your response.
The installer came and had a look and after he spoke to the support, he has ordered a new CT clamp which is exactly what you recommended. So you were spot on.
Now he also got me to reverse the clamp direction before ordering the replacement. There was no difference in readings.
I took the clamp off all together and I noticed that only difference made was that the GRID activity was no longer showing up (which clamp only shows as a few watts in or out).
I also looked at the inverter and I had two options in Features> CT/Meter, which was SET and CHECK. I pressed CHECK and it inverter took a while and responded back with UNKNOWN STATE. I did not try the SET option.
My only concern at this stage is Battery is not being used at all when PV production is low or NIL? is that because of faulty CT Clamp?
Appreciate your response.
The installer came and had a look and after he spoke to the support, he has ordered a new CT clamp which is exactly what you recommended. So you were spot on.
Now he also got me to reverse the clamp direction before ordering the replacement. There was no difference in readings.
I took the clamp off all together and I noticed that only difference made was that the GRID activity was no longer showing up (which clamp only shows as a few watts in or out).
I also looked at the inverter and I had two options in Features> CT/Meter, which was SET and CHECK. I pressed CHECK and it inverter took a while and responded back with UNKNOWN STATE. I did not try the SET option.
My only concern at this stage is Battery is not being used at all when PV production is low or NIL? is that because of faulty CT Clamp?
Give the Set option a try, it will take you to a screen that shows what is configured and that’s the one that should say >CT< - if it doesn’t select it.NewUser8888 wrote: ↑Mon Jan 12, 2026 9:36 pm
I also looked at the inverter and I had two options in Features> CT/Meter, which was SET and CHECK. I pressed CHECK and it inverter took a while and responded back with UNKNOWN STATE. I did not try the SET option.
My only concern at this stage is Battery is not being used at all when PV production is low or NIL? is that because of faulty CT Clamp?
Without a CT the system has no way of calculating the house load and so the battery won’t be able to be used until you have a working CT clamp.
Thanks
I tried the SET option and it showed >CT< so I did not proceed any further.
I will wait for the replacement CT to be installed and will report back. Meanwhile I will force discharge to use battery after PV power goes down.
The installer had CT clamp arrow pointing towards house load. Is that correct? From manual noticed I arrow should point towards the GRID.
I tried the SET option and it showed >CT< so I did not proceed any further.
I will wait for the replacement CT to be installed and will report back. Meanwhile I will force discharge to use battery after PV power goes down.
The installer had CT clamp arrow pointing towards house load. Is that correct? From manual noticed I arrow should point towards the GRID.
It wouldn’t be correct if they had wired the CT pair the correct way round at the inverter but it’s a common thing to reverse the pair (so much so that there is now an installer settings option to flip the sign) - once the CT is connected and working if you see a negative load figure in the app, accompanied by the battery charge/discharge cycling you will know if it’s the wrong way roundNewUser8888 wrote: ↑Mon Jan 12, 2026 10:14 pm The installer had CT clamp arrow pointing towards house load. Is that correct? From manual noticed I arrow should point towards the GRID.