I have a small control unit that I am powering with a 12Ah 12VDC LiFePo4 battery, a 20W 12VDC solar panel, and a Victron smart solar 100/15 charge controller. This project is on a tight budget. I would like to connect to the Smart solar charger to read my battery voltage, solar input, and load output. I have remote cellular comms with this project so being able to read that data over a modbus connection would let me see it remotely. It would really help in power tracking and troubleshooting. Is there a way to accomplish this with out adding another piece of equipment? My control unit is programmed in micropython if that helps.
If you can program up one of the UART’s then you can use the VE-Direct protocol for the MPPT and get your controller to read the data and put that in modbus registers. I have something similar on my BMS and use that with a modbus register set. code is on Github: Victron-Interfaces-code/VE7_0.py at main · MikeD2-mnb/Victron-Interfaces-code · GitHub
I will give that a try. Thank you