HA integration via Modbus: TonyM1958 vs Nathanmarlor?

iew100 · Sat Jun 07, 2025 11:22 am

My first post on here! I'm finally getting my FoxESS solar (KH7 inverter) and batteries (2 x EP11H) installed next week, and will be integrating to my HA via modbus. Is there any general view on here about the relative pros and cons of which modbus HA integration to use? I've seen TonyM1958 and Nathanmarlor and wondered if both are equally good? Thanks.

Sat Jun 07, 2025 2:25 pm

Nathanmarlor - is the most popular as it has a setup wizard built into HA.
Tony's is the most comprehensive and requires managing the config files, but offers fine control over the configuration.
I use Nathan's for every day and Tony's for testing specific changes to the fox modbus addresses.

Chapeau · Sat Jun 07, 2025 5:53 pm

iew100 wrote: ↑Sat Jun 07, 2025 11:22 am My first post on here! I'm finally getting my FoxESS solar (KH7 inverter) and batteries (2 x EP11H) installed next week.

Hi,
My scaffolding went up yesterday, exactly the same the kit as yours is in the porch, and the roofers and sparky turn up tomorrow morning. How exciting

I read a problem with the KH series is they don't support "Read/write charge periods" but there are workarounds. I guess we need to find out what they are.

Another problem we have is our next door neighbour got in two weeks ago with a G99 for 7.4kW and that seems to have take up the whole budget for the street! DNO not being helpful at all . Funnily our MP found out about it, and not from me and asked me to contact him. Apparently I am not the first to be knocked by the DNO for a G99 round here, so he is going to find out what is going on.

I'll post what i find out.

iew100 · Sat Jun 07, 2025 8:09 pm

My scaffolding is also up for an installation starting on Monday 9th. I did read in the Nathan Marlor's integration features that KH "Read/Write charge periods" is not supported. However I wasn't aware of any potential work-around for that. Have you got a link to more information on that?

iew100 · Sat Jun 07, 2025 8:11 pm

Google gave me this via AI with an example HA automation!

https://www.google.com/search?q=foxess+ ... e&ie=UTF-8

Sat Jun 07, 2025 9:49 pm

I have an automation to write directly to the registers using the service calls.

Detailed here https://github.com/nathanmarlor/foxess_ ... issues/661

Tag1956 · Fri Jul 04, 2025 1:55 pm

Hi,

I have a KH7 installed with a WiFi dongle to access the Fox Cloud. I'm also a seasoned HA user.

I want to add a Modbus adapter but cannot find any info on the hardware needed and how to physically conect it to the KH7.

Can you advise? (BTW I'm totally ok with the HA side).

Cheers. Steve P

Fri Jul 04, 2025 3:42 pm

Tag1956 wrote: ↑Fri Jul 04, 2025 1:55 pm Hi,

I have a KH7 installed with a WiFi dongle to access the Fox Cloud. I'm also a seasoned HA user.

I want to add a Modbus adapter but cannot find any info on the hardware needed and how to physically conect it to the KH7.

Can you advise? (BTW I'm totally ok with the HA side).

Cheers. Steve P

This should help, https://github.com/nathanmarlor/foxess_ ... ring-Guide plus a list of working adapters listed on the wiki page