Translate your schedule into a percentage
Four hours of lighting during a 24-hour window is about 17% usage, not 100%. Two hours of phone charging is about 8%. The starter keeps the shared camping preset visible so you can change each assumption rather than hide it inside a recommendation.
Treat cooler demand as a variable
Ambient temperature, the set temperature, insulation and how often the lid opens affect compressor runtime. The 40% sample is not a measured figure for your cooler. Check consumption over a representative day and confirm the output and startup requirements.
Do one calculation without the sun
The planner includes no solar recharge. That gives you a baseline for how long stored energy lasts. Panel wattage is an input ceiling under suitable conditions, not a promise of daily harvest; weather, shade, orientation and the station’s input limits all matter.
Account for the ports you will actually use
The default 80% usable-capacity and 10W idle allowances are general planning assumptions. A cooler on DC and phone on USB can behave differently from an AC load. Confirm connector compatibility and replace allowances with measured values when available.
Example prepared October 14, 2026. No hands-on product tests are claimed.