Max power (W)
The maximum power your inverter can handle in either direction — charging the battery from solar / grid, or discharging the battery to load / grid. Modern hybrid inverters have a single rating that applies symmetrically both ways.
How the simulator uses it
On every step, this value caps how much power can flow into the battery (limiting how fast surplus solar can charge) and how much can flow out (limiting how fast the battery can cover load). When the requested power exceeds the cap, the simulator splits the deficit: excess load comes from grid, excess solar exports or curtails.
Typical values
- Single-phase residential hybrid: 5,000 W
- Three-phase residential hybrid: 10,000 W
- Tesla Powerwall 2: 5,000 W
- Tesla Powerwall 3: 11,500 W
- Small caravan inverter/charger: 1,500–3,000 W
Check your inverter’s data sheet — the number is usually labelled “rated AC power”, “maximum apparent power”, or just the headline kW spec.
Related
The Export limit is a separate cap — set by your distributor (DNSP) on how much you’re allowed to send back to the grid. Max power is your inverter’s hardware ceiling; export limit is a regulatory ceiling that bites only on the grid-export channel.
Closes this tab and returns to the calculator.