Start with what you need to power
A dependable system begins with daily energy use—not a panel count. Use the sizing guide to build an estimate, then continue through each decision below.
- Estimate daily energy use
- Estimate solar panel output
- Size a battery bank
- Choose system voltage
- Size the inverter
- Choose wiring and protection
System boundary
Your final design depends on the loads, location, seasonal production, desired backup time, equipment specifications, local rules, and installation conditions. Treat online calculations as a planning starting point, then verify the final design for your actual system.