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
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
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