VoltSolarGuide is an independent educational website for people exploring off-grid solar, battery systems, and solar-powered water pumping in the United States.
What you can use here
Use our solar tilt calculator to estimate panel angles, our voltage drop calculator to compare wiring options, and our refrigerator battery calculator to estimate backup time. The warranty and repair guide helps organize questions when an installer closes. Our well-pump guide explains the information to gather before comparing equipment.
How to use our information
Calculators provide estimates using the assumptions described on each tool page. They do not replace site-specific engineering, manufacturer instructions, permits, or advice from a licensed professional. VoltSolarGuide is not a solar installer, warranty administrator, or emergency repair service.
Sources and corrections
We link to sources so readers can check assumptions and follow up with original organizations. If you find a mistake or a broken link, please use our contact page and include the page URL and the correction you suggest.