Solar Recharge Calculator
How fast can you solar-charge your power station? Enter your panel size, station's solar input limit, and sun conditions. Real-world output is always lower than the panel's rated wattage — this calculator accounts for that.
Time to Full Charge
6
hours of direct sun
819Wh to charge (20% → 100%)
Won't fully charge in one day
Daily recovery: ~696Wh (5 peak sun hours)
You'll recover 85% per day. Consider a larger panel or supplementing with wall charging.
Real-world solar output
200W
160W
139W
200W
Assumptions
- Sun condition factor: 80% of rated panel output
- MPPT charging efficiency: 87%
- Peak sun hours: 5h/day
- Station solar input cap: 200W
Real solar charging varies with panel angle, shade, temperature, and time of year. These estimates assume the panel is reasonably aimed at the sun. Partial shade can cut output dramatically.
Solar Recharge
6h
139W real output
696Wh/day
FAQ
How long does it take to solar charge a portable power station?
With a 200W panel in full sun, a 1000Wh station charges from 20% to full in about 6-7 hours. Cloudy conditions, small panels, or low station solar input limits can double or triple that time.
Does my panel's rated wattage match real-world output?
No. A '200W' panel typically produces 140-170W in good direct sun (70-85% of rated). In partly cloudy conditions, expect 100-120W. Overcast drops it to 40-70W.
What if my panel is bigger than my station's solar input?
The station's solar input is the bottleneck. A 400W panel paired with a station that accepts 200W max will only charge at 200W. Check your station's solar input spec before buying a panel.
Can I solar charge while using the power station?
Yes — most stations support pass-through charging. But your net charge rate equals solar input minus device load. If your panel provides 100W and your devices use 60W, the battery gains only 40W.
How many peak sun hours does my area get?
The US averages 3-7 peak sun hours per day. Southern states (AZ, TX, FL) get 5-7. Northern states (WA, MN, NY) get 3-4. Winter reduces peak hours everywhere. Check NREL's solar resource maps for your specific location.