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WattWise — Your Pro Power Runtime Estimator

WattWise — Your Pro Power Runtime Estimator. Shows a house with solar panels, a fuel generator, and a battery station alongside the WattWise app displaying a 4h 30m runtime estimate.
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Battery Station

  1. Select your power station or enter a custom capacity.
  2. Open the Appliances panel and add what you plan to run.
  3. Use the +/− controls to set quantities per appliance.
  4. Optionally enable Solar Input and enter your panel details to see how solar reduces battery draw.
  5. Your estimated runtime until battery depletion updates in real time at the top.

Fuel Generator

  1. Select your generator size from the preset list.
  2. Enter the fuel tank capacity.
  3. Adjust the fuel burn rate if it differs from the preset default.
  4. Open the Appliances panel to track load against rated capacity. Use the +/− controls to set quantities per appliance.
  5. Your estimated runtime appears instantly at the top.

💡 Tip: Petrol generators burn near-rated fuel at any load. Running at low load wastes fuel — aim to fill your rated capacity with appliances for the best cost-per-kWh.

Estimated Runtime

Add appliances below to calculate runtime

🔋 Battery Settings

Wh
500 W
%

Estimates only. Actual runtime varies with load, temperature, and equipment condition. Settings and Custom Appliances are saved in your browser.