Solar Power Calculator

Estimate solar panel count, usable battery storage, roof space, and equipment costs for backup power planning.

☀️

Solar Power Calculator

Estimate your off-grid solar and battery needs.

Uses a PVWatts-style 86% system derate for typical solar losses and sizes batteries for roughly 90% usable lithium capacity. Verify final designs with an installer, local code, and site-specific shading.

⚡ Daily Energy Usage (kWh)

Check your utility bill or estimate: Small Home (10-20 kWh), Average (20-40 kWh), Large (40+ kWh).

📍 Your Location

Planning Sun Hours: 4.5 hrs/day

🔋 Backup Days (Battery Storage)