Typical wattage range
10-35 W. Use a measured average when the device matters.
Small electronics
Tablet charging Runtime Estimate
USB-C charging efficiency is usually better than AC inverter charging, but charger and cable limits still matter.
Planning default
20 W at 100% duty cycle.
Confidence label
estimated. Treat the result as a planning estimate, not a lab measurement.
How to use this scenario
- Start with 20 W if you do not have a watt-meter reading yet.
- Tablet charging is treated as a continuous load, so runtime is sensitive to the real wattage you enter.
- Keep at least a planning reserve because battery age, temperature, output path, and device settings can move the result.
Watch-outs
- The scenario wattage is an estimate. Measure the real load before relying on it for outage, travel, or critical planning.
Sources
- U.S. Department of Energy appliance energy estimation guide (official) - Explains how to calculate energy use from wattage, hours, and nameplate current.