Hi, I am setting up a Waveshare RS485 to Modbus adapter to connect my KH10 inverter to Home Assistant. The inverter is not installed yet - fingers crossed, it will be by next Tuesday - so I can't test anything but I have read as much as I can about the process. My main questions at the moment are about configuring the Waveshare device. I am trying to follow Nathan Marlor's very helpful wiki on Github, https://github.com/nathanmarlor/foxess_ ... TH-%28B%29 but I am confused about what baud rate to set. I have seen several quoted values, 9600, 19200, etc so my questions are:
Can you set the RS485 baud rate in the KH10 inverter and if yes, then how to do this?
If the KH10 has a fixed baud rate what is it?
Thank you in advance and also apologies in advance as I just know there will be loads more questions as I try and get HA to work with my setup.
Regards, Hugh
KH10 with 4 off ECS4800 batteries.
20 Jinko 435W panels in 2 strings. 10 on house, south facing, 10 on barn, east facing.
Solar installation active on 27/11/2024. Export MPAN active on 30.12/2024.
Zappi V2 charger and 2 EVs.
Currently on Octopus Intelligent Go tariff.
Home Assistant modbus integration (Now working - ish)
20 Jinko 435W panels in 2 strings. 10 on house, south facing, 10 on barn, east facing.
Solar installation active on 27/11/2024. Export MPAN active on 30.12/2024.
Zappi V2 charger and 2 EVs.
Currently on Octopus Intelligent Go tariff.
Home Assistant modbus integration (Now working - ish)
You can’t set the inverters baud rate it is fixed, the waveshare should be set to 9600, N, 8, 1
See here for full settings https://github.com/nathanmarlor/foxess ... TH-%28B%29 approx half way down the page it says Now, copy these settings (obviously ignore the IP address that should be yours)
See here for full settings https://github.com/nathanmarlor/foxess ... TH-%28B%29 approx half way down the page it says Now, copy these settings (obviously ignore the IP address that should be yours)
Thanks for that. 9600 baud it is. Or will be, scaffolding for panel installation put up today so getting close!
KH10 with 4 off ECS4800 batteries.
20 Jinko 435W panels in 2 strings. 10 on house, south facing, 10 on barn, east facing.
Solar installation active on 27/11/2024. Export MPAN active on 30.12/2024.
Zappi V2 charger and 2 EVs.
Currently on Octopus Intelligent Go tariff.
Home Assistant modbus integration (Now working - ish)
20 Jinko 435W panels in 2 strings. 10 on house, south facing, 10 on barn, east facing.
Solar installation active on 27/11/2024. Export MPAN active on 30.12/2024.
Zappi V2 charger and 2 EVs.
Currently on Octopus Intelligent Go tariff.
Home Assistant modbus integration (Now working - ish)
Hi, I am in the same situation. My installation will hopefully be done end of next week.
Can you give me some details on the Waveshare RS485 to Modbus adapter, model etc.
Thanks, Brian
Can you give me some details on the Waveshare RS485 to Modbus adapter, model etc.
Thanks, Brian
Slightly off topic - woud you be able to share a photograph of the location where you added the modbus to the KH10.
On my unit there is a metal plate currently covering the location where the modbus needs to be connected. I was hoping to see a photo of the location to ascertain whether the wiring needed is something I can try myself.
I'm yet to purchase the modbus.
Thanks in advance.
On my unit there is a metal plate currently covering the location where the modbus needs to be connected. I was hoping to see a photo of the location to ascertain whether the wiring needed is something I can try myself.
I'm yet to purchase the modbus.
Thanks in advance.
Site Admin
It goes in the same port as the current ct cable. You’re likely getting it mixed up with the parallel ports.Carson wrote: ↑Sun Oct 12, 2025 1:12 am Slightly off topic - woud you be able to share a photograph of the location where you added the modbus to the KH10.
On my unit there is a metal plate currently covering the location where the modbus needs to be connected. I was hoping to see a photo of the location to ascertain whether the wiring needed is something I can try myself.
I'm yet to purchase the modbus.
Thanks in advance.
If you post a photo of the bottom of your inverter I can circle it for you.
Community Admin / FoxESS Elite Professional
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Fox ESS Tri Inverter Installation
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Did I help you? Feel free to leave me a tip Book a zoom meeting for remote consultancy or help Switch to Octopus and earn £50 Get a heatpump from Octopus and earn £100 Subscribe to my YouTube channelFox ESS Tri Inverter Installation
2 x KH Hybird Inverters (Parallel Mode)
1 x H1 Gen1
24 x HV2600 (62.4kWh)
32 x 490w across 4 arrays
Dual Tesla Household
Heatpump & Low Carbon Housebuild
Thank you, Will.
You are correct - I was confused with the paralell ports panel.
The way I understand it now, I will have to remove the 'Meter/CT/RS485' plug. I will then need to add two wires to pin 3 and 4 within the plug and then reconnect it. The other two ends of the wire connected to pins 3 and 4 will go to the relevant location on the EW11 RS485 module that i'm planning on using.
This is the point where I hit my next snag, i'm using the EW11 RS485 wifi module. The reason for this is, I don't have the ability to run an ethernet cable to the KH10 (which sits outside the house). I also don't have any power plugs nearby to externally power the EW11.
On my reading of the user manual for KH10, it appears there is no place on the inverter where I can tap in and borrow the power to run the EW11. Is this correct?
Options i'm considering so far:
1. pay someone to do a cable run of ethernet (imagine this will be expensive for a single cable run). However, I understand if a cable is run, then power to the EW11 is not required as the LAN version doesn't require it;
2. paying someone to install a powerplug to the outside of the house near the inverter;
3. setup a small solar panel with a controller charging a small powerbank, and also using the powerbank to run the EW11;
I think option 3 is doable for under $100. Please let me know if you have any other creative solutions.
You are correct - I was confused with the paralell ports panel.
The way I understand it now, I will have to remove the 'Meter/CT/RS485' plug. I will then need to add two wires to pin 3 and 4 within the plug and then reconnect it. The other two ends of the wire connected to pins 3 and 4 will go to the relevant location on the EW11 RS485 module that i'm planning on using.
This is the point where I hit my next snag, i'm using the EW11 RS485 wifi module. The reason for this is, I don't have the ability to run an ethernet cable to the KH10 (which sits outside the house). I also don't have any power plugs nearby to externally power the EW11.
On my reading of the user manual for KH10, it appears there is no place on the inverter where I can tap in and borrow the power to run the EW11. Is this correct?
Options i'm considering so far:
1. pay someone to do a cable run of ethernet (imagine this will be expensive for a single cable run). However, I understand if a cable is run, then power to the EW11 is not required as the LAN version doesn't require it;
2. paying someone to install a powerplug to the outside of the house near the inverter;
3. setup a small solar panel with a controller charging a small powerbank, and also using the powerbank to run the EW11;
I think option 3 is doable for under $100. Please let me know if you have any other creative solutions.