Live values
| Group | Values |
|---|---|
| Solar (PV) | PV input voltage, PV charging power |
| Output | AC output voltage and frequency, active power, apparent power, load percentage |
| Grid | Grid voltage and frequency |
| Battery | Voltage, charging current, discharge current, capacity percentage as seen by the inverter |
| Inverter | Heat-sink temperature, bus voltage, operating mode |
| Warnings and faults | Current warning flags and fault codes, translated into readable text |
Exact values depend on the model and its firmware: single-tracker, dual-tracker and parallel-capable versions report slightly different sets. Tell us your model and we test it before shipping.
Daily totals
From the live values the box computes daily solar energy, energy used by the house and energy drawn from the grid, so you can follow each day without a separate meter.
Where it appears
- Screen on the box: solar power, load, battery level and mode.
- Local dashboard at
http://moniwatt.local, password protected. - Home Assistant via MQTT discovery.
- JSON API for Node-RED, Grafana, scripts.
- Remote dashboard, optional, with history and alerts.
Read-only
The box only asks the inverter for its status. It does not change output priority, charge current, battery type or any other setting.
Only one device on the port
The RS232 port serves one device at a time. If a Wi-Fi dongle or a computer already uses it, unplug that one: MoniWatt for Axpert replaces it.