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☀️ How long until the sun fills your battery? Pick your power station, slide in your panels and sky, and get an instant estimate.
Next steps: see which panels fit your unit in the panel pairing guide, compare solar generator kits, read how long to charge with solar, size your loads with the runtime calculator, or test yourself in the Blackout Survival Challenge.
How it works: hours ≈ Wh needed ÷ (min(panel W, unit’s max solar input) × 0.7 × weather factor). The 0.7 planning factor and the weather factors (sunny 1.0, partly cloudy 0.6, overcast 0.25, rain 0.1) are rough assumptions, not measurements. Real results depend on panel angle, temperature, shade, the unit’s voltage and current limits and its per-port caps. Max solar input from manufacturer pages, checked Oct 16, 2026. Estimates only. Wiring solar into your home needs a licensed electrician; never backfeed through a wall outlet.