question

hesam-m-atsys avatar image
hesam-m-atsys asked

How to read BMV-712 SOC from MPPT100/20 via Bluetooth?

We have a control system (PLC) which reads the MPPT 100/20 parameters via VE. Direct 232 (Hex) protocol. Our system is comprised of:

  1. 1 x MPPT100/20
  2. 1 x BMV 712 Smart Bluetooth
  3. 1 x Smart Battery Sense
  4. These are connected and working smoothly together

We require to monitor the SOC, Battery Voltage and Temperature. We can read last two parameters (Temperature and Batt. Voltage) from the MPPT registers. So the smart Battery Sense fills the data registries in MPPT 100/20 and we can read them. Following the same approach, we wish to read the SOC from from MPPT registers (MPPT to perform be as our communication interface with PLC).

We don't want to implementing two VE. Direct 232 (Hex) protocol. in other words utilising one VE. direct connection to MPPT and capturing all the information that we can see on the mobile app.

P.S: We have tried and established a separate VE. Direct connection with BMV-712 and managed to read the SOC directly from there, but we can't have two serial connection to PLC.

Can anyone assist or provide some suggestion?

MPPT SmartSolarBMV Battery Monitormppt charging
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1 Answer
mvader (Victron Energy) avatar image
mvader (Victron Energy) answered ·

Hi, sorry - but that is not possible.

The only solution to have one port/interface to the full system would be to install a gateway, ie a GX device like the Cerbo. And then switch from rs232 to modbustcp.

But that is probably overkill for your system.


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