RV Solar Calculator
Free RV solar sizing calculator - find out if your solar panels can keep up with your power needs. Calculate watts needed for off-grid camping and boondocking.
SOLAR CALC
Your Solar Setup
W
Add up all your panels (e.g., 2x 200W = 400W)
hrs
Peak sun hours per day (US avg: 4-6)
Ah
Daily Power Needs
Ah
Use the Electrical Load Planner to calculate this
Solar Analysis
Daily Solar Harvest
-- Ah
Daily Balance
-- Ah
Usable Battery
-- Ah
Solar Sizing Guide
Rule of Thumb
You need roughly 2-3 watts of solar per 1 Ah of daily usage in average conditions.
Sun Hours by Region
- Southwest US (summer): 6-7 hours
- Midwest/South: 4-5 hours
- Pacific Northwest: 3-4 hours
- Winter anywhere: Reduce by 30-50%
Efficiency Losses
Real-world solar harvest is ~75-85% of theoretical due to heat, angle, shading, and controller losses. This calculator uses 80% efficiency.
For educational purposes only — full disclaimer ↓