Battery charge time
Enter battery capacity, panel wattage, station input cap, and sun hours. See how many hours/days a full recharge takes.
Formulahours = missing Wh / (min(panels, input cap) × 0.75)
Your inputs
Effective charging power
300 W
Below station cap
Total time (direct sun)
2.7 h
Typical days
0.7 days
4h sun/day
Methodology and assumptions
Real charging power is capped at min(panel wattage, station input). We apply 25% standard losses (cabling, MPPT controller, temperature, angle). Recharge time = missing Wh / real power.
"Direct sun" figures assume peak sunlight the whole time. In practice, peak sun hours per day are 2.8-4.5 across Europe; dividing by sun hours approximates real-world days better.
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