RV Battery and Solar Calculator
Enter how much 12V energy you use per day. We size the battery bank and the solar array needed to refill it.
Result
- Battery bank
- 200 Ah
- Solar array
- 350 W
- Daily energy
- 1,024 Wh
Real solar output is usually 70-80% of panel rating after heat, angle and wiring losses, which this estimate includes.
How this calculator works
Battery capacity = daily Ah x days / usable fraction. Solar watts = daily Ah x 12.8 V / (peak sun hours x 0.75 system efficiency), so the array refills one day's use on a typical sunny day.
Add this calculator to your site
Free to use on your blog, shop, forum or class page. Paste the code into any HTML block. Please keep the credit link.