Hi all
I've just had a KH10 and 42Kwh battery installed but seeing signs already something may not be right with the install.
At a glance, the battery hasn't discharged once (other than small amounts) over 3 days, despite our house definitely using power when we're no longer generating solar. In addition to this the house load seems to just follow the solar panel generation - during the day it shows us using 4-5kwh, and at night it shows us using 0.
I've checked CT clamp settings and it's definitely enabled, changing the reverse setting makes no difference as well.
I'm wondering if the CT clamp or the internal meter mechanism of the inverter is faulty? The somewhat smoking gun in all of this is that the meter device in Fox ESS cloud has never shown values above/below 0.01kw, so makes me think that just isn't reading load correctly at all
The one puzzling part is that yesterday after a restart of the inverter and reseating the CT clamp plug into the inverter, the inverter itself showed data that made sense (2kwh being generated by panels, 600w battery discharge, nothing from grid), but then inevitably returned to usual illogical data.
Has anyone seen this before and have any ideas I could try while I try and organise for the installer to come back out?
Have added pictures here showing meter data and the load basically mirroring solar production: https://imgur.com/a/VnNJxlv
I can’t see your images, they are regionally protected - but you can add images to your posts as attachments.
For what it’s worth you definitely have a metering problem, either the CT clamp is not wired up, has been extended too far (over 20 metres), or is disabled in the settings - this video shows how to check that https://youtube.com/shorts/WoOPmAlFTuc ... hYt9gcpLxq
For what it’s worth you definitely have a metering problem, either the CT clamp is not wired up, has been extended too far (over 20 metres), or is disabled in the settings - this video shows how to check that https://youtube.com/shorts/WoOPmAlFTuc ... hYt9gcpLxq
Thanks for the reply!
I've added pictures here that show wiring of the clamp, location of it, plus graphs showing wonky data.
I checked the clamp this morning and it appears to be on the right line and not loose. Maybe faulty?
I've added pictures here that show wiring of the clamp, location of it, plus graphs showing wonky data.
I checked the clamp this morning and it appears to be on the right line and not loose. Maybe faulty?
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Not easy to tell whether it’s on the right line, but it should be on the main live feed from your supply meter - i.e. it will be detecting everything flowing in and out of the house.
Those connectors are notoriously bad at jointing the cable so that’s a good place to start - certainly over time they will degrade but as a new install they normally work (they really should be soldered).
The inverter losing it’s CT setting is a common ish problem after a new install and firmware update so definitely start there in settings - if it is enabled (it will say >CT<), then it is likely a wiring fault either in those connectors or where the wires connect to the meter connector underneath the inverter (again a common problem) but you should call your installer back to check that for you.
Those connectors are notoriously bad at jointing the cable so that’s a good place to start - certainly over time they will degrade but as a new install they normally work (they really should be soldered).
The inverter losing it’s CT setting is a common ish problem after a new install and firmware update so definitely start there in settings - if it is enabled (it will say >CT<), then it is likely a wiring fault either in those connectors or where the wires connect to the meter connector underneath the inverter (again a common problem) but you should call your installer back to check that for you.
Ah yep so I can confirm it's connected to the red cable coming in from underneath (next to a black a green yellow one, so assume this is the incoming supply)
I did also check the CT setting previously and confirmed that it is set to CT as it should be
Bugger - was hoping I might be able to do something my self but seems like that isn't the case! Is there any point in just twisting the wires together manually (without the little connector) as a test to see if I get anything? Is it possible/likely the clamp itself is faulty?
I did also check the CT setting previously and confirmed that it is set to CT as it should be
Bugger - was hoping I might be able to do something my self but seems like that isn't the case! Is there any point in just twisting the wires together manually (without the little connector) as a test to see if I get anything? Is it possible/likely the clamp itself is faulty?
It’s unlikely to be the clamp itself (but not impossible), yes you can try re-making those connections there’s a reasonable chance it’s there and worth tracing that cable from the CT to where it goes into the bottom of the inverter to see if it has been strained anywhere. After that you’ll need to open the connector on the inverter which may be best left to the installer.aplant wrote: ↑Fri Apr 03, 2026 8:56 am Ah yep so I can confirm it's connected to the red cable coming in from underneath (next to a black a green yellow one, so assume this is the incoming supply)
I did also check the CT setting previously and confirmed that it is set to CT as it should be
Bugger - was hoping I might be able to do something my self but seems like that isn't the case! Is there any point in just twisting the wires together manually (without the little connector) as a test to see if I get anything? Is it possible/likely the clamp itself is faulty?
Bugger so I did try fiddling with the end that I've got pictures of - from what I can tell they're intertwined as it is and seem pretty solid in the connector (weren't loose and a little tug on all didn't unseat anything). That leaves the inverter side but I couldn't figure out how to actually get the cable out to inspect it so perhaps I'm left with just needing to wait for the installer as you said.Dave Foster wrote: ↑Fri Apr 03, 2026 6:36 pm It’s unlikely to be the clamp itself (but not impossible), yes you can try re-making those connections there’s a reasonable chance it’s there and worth tracing that cable from the CT to where it goes into the bottom of the inverter to see if it has been strained anywhere. After that you’ll need to open the connector on the inverter which may be best left to the installer.
Thanks for all your help either way, I really appreciate it!
just a possible....... our new system (albeit somewhat smaller than yours) did exactly the same.....and it turned out that the inverter needed to be set for "meter" rather than "CT" as it was shipped with
14 x Aiko Neostar 2p plus 475W panels (6.65 kWP)
Fox EP12 10.4kW usable battery
FOX KH7 7kw hybrid inverter
EN-EPS-BOX-SP gateway
Fox EP12 10.4kW usable battery
FOX KH7 7kw hybrid inverter
EN-EPS-BOX-SP gateway
I did think about this but I don't have a meter installed as far as I can tell, so assume CT is the right thing to use instead?
I've also re terminated the CT cables in the switchboard, and still no luck.
Only thing left would be to check the pins for the cable that plugs in at the inverter side, but I have no idea how to actually get the cable out (cables runs in and I can't see a way to 'release' it from the pins that plug in to the connector in the inverter)
Only thing left would be to check the pins for the cable that plugs in at the inverter side, but I have no idea how to actually get the cable out (cables runs in and I can't see a way to 'release' it from the pins that plug in to the connector in the inverter)
If you push down on the little orange pegs, they open up and allow you to release/insert cables.aplant wrote: ↑Sat Apr 04, 2026 11:26 am Only thing left would be to check the pins for the cable that plugs in at the inverter side, but I have no idea how to actually get the cable out (cables runs in and I can't see a way to 'release' it from the pins that plug in to the connector in the inverter)
https://community.home-assistant.io/t/f ... ing/778850
If this is your connector, then you press the sides (green arrows) in to remove it from the inverter.
You then will need to un-screw the connector on the bottom that clamps the cable entry.
If you then insert a flat blade screwdriver (IIRC) to the red marked area, you should be able to push back the outside case from the inner section (pictured above)
Amazing thanks!
Mine is the one at the bottom, so I'll give that a try - had no idea how to remove it from the housing. So flat head screw driver on that little latch, then push it through from there? Or does it push out the other way?
Mine is the one at the bottom, so I'll give that a try - had no idea how to remove it from the housing. So flat head screw driver on that little latch, then push it through from there? Or does it push out the other way?
The first picture is from Adamlc, it is what is left when you push back the outer sleeve.
You of course have to have your Inverter and batteries powered down, goes without saying.
It is hard to put into words, just don't force it!
I held onto the cables from the back, and with a screwdriver to open the catch in the red mark, you need to tease the outer case back towards the cable direction. The two halves should seperate.
Here is another picture of the inner connector block, and you can see the orange things you need to push down to release/inserter the cables... DO NOT pull this apart like me!
viewtopic.php?p=11240#p11240
You of course have to have your Inverter and batteries powered down, goes without saying.
It is hard to put into words, just don't force it!
I held onto the cables from the back, and with a screwdriver to open the catch in the red mark, you need to tease the outer case back towards the cable direction. The two halves should seperate.
Here is another picture of the inner connector block, and you can see the orange things you need to push down to release/inserter the cables... DO NOT pull this apart like me!
viewtopic.php?p=11240#p11240
BINGO!MaterialBarracuda48 wrote: ↑Sat Apr 04, 2026 12:47 pm The first picture is from Adamlc, it is what is left when you push back the outer sleeve.
You of course have to have your Inverter and batteries powered down, goes without saying.
It is hard to put into words, just don't force it!
I held onto the cables from the back, and with a screwdriver to open the catch in the red mark, you need to tease the outer case back towards the cable direction. The two halves should seperate.
Here is another picture of the inner connector block, and you can see the orange things you need to push down to release/inserter the cables... DO NOT pull this apart like me!
viewtopic.php?p=11240#p11240
One of the cables into the connector was snapped off completely. Removed the remnants of it (which was more difficult than you'd think), stripped, put it back in and VOILA!
Measurements make sense and for the first time the meter device is showing an actual reading. Thanks again so much for all your help everyone! We're now in the promised land! Who said impatience can't have positive side effects!
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Really pleased that you fixed that yourself, can be a bit daunting!