System Configuration
- Venus OS Version: 3.60 on MultiPlus II 5000 GX (problem exists with v3.55 too)
- Grid Meter: VM-3P75CT measuring three-phase grid import/export
PV Systems:
- SMA STP X 20 (recognized natively by Venus OS via sunspec)
- Third-party Hybrid Inverter (PV yield published over D-Bus via venus-os_dbus-mqtt-pv, single-phase on L3 only)
Problem Description
Grid Export Errors:
The VM-3P75CT reports import/export correctly live, yet VRM Portal shows inconsistent grid export values (“To Grid” sum on dashboard). The export sum by day is to low (e.g. 62.1 kWh in VRM to 73.9 kWh by difference daily logged meter reading)
PV Generation Miscalculation:
The sum of the PV yield in the VRM portal does not match the sum of the individual inverters or deviates significantly (“Solar” sum on dashboard). For example, 79.3 kWh in VRM and 109.9 kWh as the sum of both PV systems Apps/API.
It appears that only the yield of the natively integrated SMA inverter is recorded here.
Are these problems already known or are there already possible solutions?