The system
A 40 kW PV array, a 200 kWh / 30 kW battery, the building and the utility share one AC bus. The building has an evening peak and an optional 11 kW EV charger. A simulated day lasts six minutes.
Three operating modes
| Mode | What it does |
|---|---|
| Grid-tie | The battery stores PV surplus and covers the deficit while keeping its backup reserve. The grid takes the rest |
| Island | The grid breaker opens and the battery alone balances the bus, down to 5 %. When it can't, load is shed or PV is curtailed |
| Shutdown | The PV and battery breakers open, and the building runs from the grid |
Battery protection
The fan starts at 40 °C. Above 45 °C the power is derated, reaching zero at 65 °C, and at 50 °C the battery trips and its breaker opens. You can inject a fan fault from the dashboard and watch it happen.
Built from library blocks
The dispatch logic is wired from MACS Studio's library blocks, and the dashboard draws the result: breakers open and close, lines flow with the power, and the battery fills. Cell voltages, temperature, today's energy and an event log sit alongside it.
This is a simulation, built to show what MACS can do.