Capacity guide
Usable Capacity vs Rated Capacity
Learn why rated watt-hours are not the same as usable watt-hours after inverter losses, reserve, battery health, and temperature.
portable power station guides
Portable Power Station Guides
Use these short explainers when you want to understand why a runtime estimate changes before trusting it for an outage, trip, or device plan.
Why These Guides Exist
A runtime result changes when efficiency, reserve, duty cycle, battery health, temperature, or output path changes. These guides explain those inputs and send you back to the calculator with the right knob to adjust.
Guide Library
Learn the assumptions behind the calculators before you trust a runtime estimate for an outage, trip, CPAP night, Starlink setup, or refrigerator backup.
Efficiency guide
Inverter Efficiency Losses
Understand why AC inverter output usually delivers less usable energy than DC or USB-C paths in portable power station runtime estimates.
Load behavior guide
Duty Cycle Explained
Learn how cycling loads such as refrigerators change average watts and portable power station runtime estimates.
Margin guide
Reserve and Battery Health
Plan portable power station runtime with reserve, aging, cold-weather loss, and margin instead of draining the battery to zero on paper.