FoxESS Community - Owners & Installers Forum

I can confirm I was able to charge last night with the settings I have. Charge was capped at 1.06 kW.

I have contacted octopus to let them know about this so maybe they can give Fox a prod.

They also said that they think my 60A fuse is a factor, but I’m not sure how that works. My Ohme EV charger works at 6kW just fine.

JamesBranson wrote: ↑Wed Mar 25, 2026 10:15 pm I can confirm I was able to charge last night with the settings I have. Charge was capped at 1.06 kW.

Yeay!

JamesBranson wrote: ↑Wed Mar 25, 2026 10:15 pm I have contacted octopus to let them know about this so maybe they can give Fox a prod.

Hopefully Fox will recognise the symptoms and push out 0.23 or whatever the latest version is.

JamesBranson wrote: ↑Wed Mar 25, 2026 10:15 pm They also said that they think my 60A fuse is a factor, but I’m not sure how that works. My Ohme EV charger works at 6kW just fine.

Depending which order your battery and Ohme are connected and where the Fox current tap is it might see the charger load. 6kW at 240V is 25A so if both were charging that could be 50A plus the house load, but I'm not aware the Fox monitors the total load. Quick Settings says mine is set at 15000W for Import and Export Limits which would be 62.5A but the unit isn't capable of that level anyway!

Fox have pushed my firmware to 0.40 and has solved my issues.

I emailed them last night and they pushed it this morning.

Mykeu wrote: ↑Thu Mar 26, 2026 9:03 am Fox have pushed my firmware to 0.40 and has solved my issues.

I emailed them last night and they pushed it this morning.

Another test version in the wild
I hope it works for you, and you can all compare notes.

Yeay, glad it's working! 0.40 - wonder what the changes are... The app is still offering me 1.09 as an upgrade. Guess Fox are still working through issues...

It seems a good sign that Fox are pushing out regular (although beta) updates that fix issues. They seem to be ‘on it’ which seems good.

Thanks for the advice on my set up. I know that the Evo 10 definitely cannot see the Ohme, as I have checked the house load when the car has started charging and it does not change on the inverter panel or the app. I am quite happy with this, as I was worried that my Ohme would drain the battery to charge the car.

I think the Ohme does load balancing, so if it detects large loads it can adjust, but then again I am not sure if it can see what the battery is pulling when charging either!

Maybe I do need a bigger fuse at some point!

Aye, I had the Ohme installed just before the Fox. I asked the Ohme installer to leave room in the meter cupboard so the Ohme could be first after the meter and then the Fox, so the battery didn't try to charge the car. He didn't leave enough room so the Fox installer spent an hour rewiring the meter box!

My Ohme is definitely aware of the incoming load - in My Charger, Advanced Settings it shows "CT Clamp Reading" which sees the charger/house/battery load and "Load Limit", which the installer set to 90A as I've got a 100A fuse.

elljay wrote: ↑Tue Mar 24, 2026 5:06 pm I've been working on getting Modbus over WiFi working so I can query the unit more often than the five minute updates via the API. If anyone's interested I can post more detail / code etc...

What WiFi adapter are you using?

I’m keen to get home assistant set up as well!

JamesBranson wrote: ↑Wed Mar 25, 2026 10:15 pm I can confirm I was able to charge last night with the settings I have. Charge was capped at 1.06 kW.

Have you tried using the v1 app? Before I got the firmware update to 0.40, I had to do this:

- set work mode to self use in v2 app
- set these battery settings in the v1 app

Mykeu wrote: ↑Thu Mar 26, 2026 10:16 am What WiFi adapter are you using?

Well I'd had a look at the connector pinout in the manual and read a load of threads about different adaptors. I pointed a web browser at the IP of the Fox and couldn't get past the Login screen, but I thought I'd try it with PyPiModbus before I got the soldering iron out and it worked, so there's WiFi Modbus built in which is very nice!

Had a go at setting up SSL certificates on Home Assistant a while ago but wasn't getting anywhere so I've been writing my own Python code at the moment and am trying to work out what's been lost in translation in the Modbus and API documentation. Maybe I should have another look at HA...

I literally just noticed that as well!

I checked my router and saw I have an active inverter connected - which matched the S/N.

Mykeu wrote: ↑Thu Mar 26, 2026 11:20 am I literally just noticed that as well!

I checked my router and saw I have an active inverter connected - which matched the S/N.

Yeay, no soldering!

elljay wrote: ↑Thu Mar 26, 2026 11:22 am

Mykeu wrote: ↑Thu Mar 26, 2026 11:20 am I literally just noticed that as well!

I checked my router and saw I have an active inverter connected - which matched the S/N.

Yeay, no soldering!

I had a quick attempt at setting it up with HA using this modbus fork (as the original project does not support EVO 10) https://github.com/AdamNewberry/foxess_modbus_EVO

Currently got a really crap dashboard going

Err, yeah, well it's a start...

Mine's a bit more text based. I used to be on Agile so I'll make a few changes once I figure out the which Fox energy stat is which..!

The INV_Master 0.23 firmware has just appeared on my app today, so I will install that later and see how we go! I wonder if they are slowly rolling it out or pushing it to people who have grumbled at Octopus/Fox. My install manager did say they were going to raise my issues with Fox today.

So I installed the 0.23 but it seemed to hang on 99%, when I checked later it still said I was on 1.09. BUT last night the battery charged to full in about and hour and a half, so it looks like it was going at a lot more than 1.06kW. I think there has been some change made but who knows.

The battery minimum SOC was also an issue this morning, as in the app it was now at 98%, so even though I didn’t have enough solar to meet house load the battery refused to kick in. I changed it on the app back to 10% and it started to discharge to the house.

I have adjusted settings now to maximum charge from the grid to 50% tonight to see if it behaves. Going to be exporting a lot of kW today and not getting paid for it, which is annoying!

The app will show you the charge rate for yesterday: Click Daily Production and then the left arrow to show yesterday. The light pink line above the axis is Grid import.

Yes, it's confusing - there are two similarly named settings: "Min. SoC on grid" (Minimum SoC for the battery to be "on grid" - i.e. supplying power.) only appears in the web interface; "Min SoC" is the Minimum SoC when discharging etc.

It definitely seems like this model was released before the firmware was ready!

Mykeu wrote: ↑Thu Mar 26, 2026 2:10 pm

elljay wrote: ↑Thu Mar 26, 2026 11:22 am

Mykeu wrote: ↑Thu Mar 26, 2026 11:20 am I literally just noticed that as well!

I checked my router and saw I have an active inverter connected - which matched the S/N.

Yeay, no soldering!

I had a quick attempt at setting it up with HA using this modbus fork (as the original project does not support EVO 10) https://github.com/AdamNewberry/foxess_modbus_EVO

Currently got a really crap dashboard going

IMG_6089.jpeg

I'm getting my Evo on April 6th and just wondering what connection method you chose when you configured ha? I'm trying to get it as set up as possible before the unit arrives.

I'm assuming no modbus adaptor is required going by what you are saying.

Thanks

Hi, PyPiModbus over WiFi is working well for me

Any idea what the recommended charge rate should be for a forced charge on a 5kw battery.