1. Enter Your Daily Energy Consumption
List every device you plan to run with its quantity, watts, and hours used per day. These devices are shared across every power station, and the totals drive all runtime estimates.
Device Wh = Watts × Qty × Hours · Total Load (W) = sum of Watts × Qty
2. Check the Shared Settings
Pick the currency used for station prices, and adjust the derate factors if you want more optimistic or conservative recharge estimates. Typical values: solar 1.15–1.25, AC ~1.1.
3. Add Power Stations
Click “+ Add Power Station” beside the station tabs. Choose “From Catalog” to pick a brand, then search or scroll its listed models — the published specs are filled in for you and stay editable. Where a listing does not state a figure, that field is left for you to enter and the form says which ones. Choose “Custom” to enter every spec yourself. Required fields are marked with an asterisk (*). The station is added when you press “Add Station”; “Cancel” closes the form and clears it. To change a station later, press “Edit Specs” in its summary — the same form opens filled in, and “Save Changes” updates it in place, keeping its position in the comparison.
4. Read the Results
Each station tab shows its specs and three results that update automatically as you type:
Runtime (h) ≈ (Capacity Wh × 0.85) ÷ Total Load W
Solar Recharge (h) ≈ (Capacity Wh ÷ Solar Input W) × Solar Derate Factor
AC Recharge (h) ≈ (Capacity Wh ÷ AC Input W) × AC Derate Factor
0.85 is the inverter efficiency factor for AC output; DC loads may run longer. The derate factors cover real-world losses such as sun angle, panel temperature, and charging losses. A warning is shown if your total load exceeds a station's continuous AC output.
5. Compare and Download the PDF
Once every station's inputs are complete, the comparison builds a side-by-side table — your daily energy need is stated once above it, since it is the same for every station. Click any column heading to rank by it, and click again to reverse the order; the grey bars show how much more or less a station offers. The longest runtime and the shortest solar and AC recharge times are highlighted with a green Best badge. Two figures are derived for you: Coverage is how many days one charge covers your daily need, and Price / Wh is the value per watt-hour. Untick “Include in comparison” on a station to keep it on the page without it taking part in the table. Switch between “Ranked” and “All Specs” at any screen size: Ranked lists the stations best-first for whichever metric you pick, and All Specs is the full table. On a phone the table becomes one card per station, and Ranked leads by default because a stack of cards cannot be compared.
“Download PDF” opens the print dialog — choose “Save as PDF” to get a report with your daily consumption, each station's summary, and the comparison table.
Your data is saved in this browser's local storage and restored when you return. “Clear All” in the navbar resets everything.