question

sysprog avatar image
sysprog asked

Why are there two Modbus spreadsheets that contain EV Charger values ?

In the technical area https://www.victronenergy.com/support-and-downloads/technical-information

There are two spreadsheets which contain EV Modbus values for the EV charger

Modbus-TCP register list --> start at address 3800

Modbus-TCP register list EVCS --> Start at address 5000

I seem only be able to address the 3800 range on my system, is the 5000 range only used in a specific configuration ?

Also address 3827 (EV Position) states "0=AC input 1;1=AC output;2=AC input 2"

But address 5026 states "0 - Inverter Ac Out, 1 - Inverter Ac Input"

On my setup the EV charger is physically connected to AC input however address 3827 reports "1" which would be correct for address 5026 but not 3827


ev charging stationev charger
2 |3000
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2 Answers
matt1309 avatar image
matt1309 answered ·

Hi @sysprog

The 5000's are the modbus registers for the modbus server running on the EVCS I believe. Whereas the 3000s you refer to are on the GX device modbus server.


So one on the charger one on the gx device.


So my guess is if you need the 5000's you should be querying EVCS IP address and not the gx devices IP

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sysprog avatar image
sysprog answered ·

Hi @matt1309

Many thanks for your reply, you are correct, I did not realise the EVCS had a modbus server, makes sense though now I think about it.

If I query my GX device I get a value of 1 for address 3827 and if I query the EVCS I get 1 for address 5026 so at least it is consistent, therefore it appears the MODBUS-TCP Register list v3.20 is incorrect which is what I suspected.

I will raise another ticket for the spreadsheet error.

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