miklosbagi/sigennut repository overview

A Network UPS Tools (NUT) driver that lets a Sigenergy SigenStor hybrid inverter/battery system be monitored as a UPS over its Modbus TCP interface — battery.charge, ups.status (OL/OB/LB/CHRG/DISCHRG), input.voltage, input.frequency, ups.realpower, and device identity, straight from the plant and inverter Modbus registers.

Look at github/miklosbagi/sigennut for details.