Page 1 of 1

Smarter control of the Inverter

Posted: Tue Nov 04, 2025 2:23 pm
by jonmjones
Sorry if this has been covered at length before, but I'm totally confused and just need a few pointers in the right direction please. My mission is to automate some of the functions of the inverter with Home Assistant, such as:

1) If it's going to be a rubbish solar day, charge the battery a bit more than normal at 2am so I don't end up running out at Peak times (and of course visa-versa)
2) If Octopus is giving away free electricity, charge the battery fully
3) Predict when we will run out of battery at any given point.

I can probably sort the programming parts, but confused what to buy to connect the inverter to my LAN (or Pi) and get that data into HA.

Thanks in advance.

H3-10 and EP11 battery

Re: Smarter control of the Inverter

Posted: Tue Nov 04, 2025 3:24 pm
by Dave Foster
Yes all of that is no problem and once you get it running you'll discover more and more ways to keep you amused ;)

You need to connect to the inverter over modbus and there's a guide here that shows how the modbus adapter is wired https://github.com/nathanmarlor/foxess_ ... ring-Guide

Basically you'll need a running home assistant, a raspberry Pi 4B is perfect but it really needs to have 4GB Ram and an SSD drive to run 24/7/365 - pretty much everything you can buy is now faster than that now.

For a modbus adaptor i'd recommend something like this https://www.amazon.co.uk/DSD-TECH-SH-U1 ... B078X5H8H7 but I also use a waveshare device you'll see mentioned in the wiring guide.

You can use a windows machine as well, this is a link to Tony M's description of setting it up on a small form factor windows box https://github.com/TonyM1958/HA-FoxESS- ... -a-USFF-PC

Finally this is a pretty good video (By William... naturally :) )that shows the steps to set up a home assistant https://www.youtube.com/watch?v=kE_6HtzcyXg

Re: Smarter control of the Inverter

Posted: Tue Nov 04, 2025 3:33 pm
by jonmjones
thanks, will do some more reading...