FoxESS Community - Owners & Installers Forum

Posted: **Mon Aug 04, 2025 3:47 pm**

Hi All,

I'm trying to wrap my head around what I need to get HA/Modbus up and running. I have my HA setup already running and would like to add Modbus to the fold but I'm falling over on what I need to purchase.

I have read the Github FAQ over a few times but I think my setup complicates things (or could just be me overthinking)

All my equipment is external, I have a KH10 Inverter. There is power on the other side of the wall to where the install is so can drill a hole for that but what cables should I be running?

Here is where my knowledge is failing.

Outside (Inverter -> Wiring??) Inside ( -> USR-TCP-410s -> ethernet to homeplug -> HA Box )

As the wiring would be going external should I use a certain cable? For this it could also need to be upto 3M in length as might want to locate in a nearby cupboard. Router is on the other side of the house so no easy to just run an ethernet cable.
I like the USR-TCP-410s as it can just be plugged in without exposed wires like the Elfin unless I am missing something with this?

Picture is of the inverter.

All help much appreciated.

Cheers

Posted: **Tue Aug 05, 2025 12:30 pm**

The cable from the inverter to the adaptor is RS485, which can run over twisted pair cable - the more distance you run the more you should consider a better quality of cable but for 3 metres you can comfortably use bell wire, speaker cable or similar - ideally over very long distance or (electrically) noisy environments it should be cat 5/6 cable and you cut the ends off and use 1 of the twisted pairs within but the cores are fiddly to handle.

Posted: **Wed Aug 06, 2025 10:30 am**

dnaddison wrote: ↑Mon Aug 04, 2025 3:47 pm Hi All,

I'm trying to wrap my head around what I need to get HA/Modbus up and running. I have my HA setup already running and would like to add Modbus to the fold but I'm falling over on what I need to purchase.

I have read the Github FAQ over a few times but I think my setup complicates things (or could just be me overthinking)

All my equipment is external, I have a KH10 Inverter. There is power on the other side of the wall to where the install is so can drill a hole for that but what cables should I be running?

Here is where my knowledge is failing.

Outside (Inverter -> Wiring??) Inside ( -> USR-TCP-410s -> ethernet to homeplug -> HA Box )

As the wiring would be going external should I use a certain cable? For this it could also need to be upto 3M in length as might want to locate in a nearby cupboard. Router is on the other side of the house so no easy to just run an ethernet cable.
I like the USR-TCP-410s as it can just be plugged in without exposed wires like the Elfin unless I am missing something with this?

Picture is of the inverter.

All help much appreciated.

Cheers

I have a set-up where the inverter and battery are both outside. I've recently connected a Modbus Waveshare RS485 TO POE ETH (B) adapter. I used Cat6 ethernet cable. It was really simple to wire a twisted pair into the inverter connector, run the cable up the external wall, through the soffit, and into the left where my network switch is located.

FoxESS Community - Owners & Installers Forum

New Setup, External Equipment, Where to start?

New Setup, External Equipment, Where to start?

Re: New Setup, External Equipment, Where to start?

Re: New Setup, External Equipment, Where to start?