May ’20: Installed 2x100Ah 12v TN Power LiFePO4 batteries.

Checking the resting voltage and the charging current/voltage doesn’t cut the mustard for these batteries, so I created a monitoring system for the batteries (and the solar controller).

The MPPT is an Epever XTRA4150.

The V/Wh/A and shunts are Peacefair PZEM017’s with (300A shunts), and the wifi stations are Elfin EW11’s. Both are available online from EBay/Alibaba etc.

There are two EW11’s because although the PZEM’s and Epever both talk MODBUS over RS485, they have different baud rates which aren’t changeable.