Solar Panel Sizer PV kW

Solar Panel Sizer — PV System Sizing by Peak Sun Hours

# What it does
Calculates the number of panels, system size in kW, annual & monthly production, and roof area requirements for residential and commercial photovoltaic systems.

# Features
- Daily energy consumption (kWh) input
- Peak sun hours by location
- 7 panel presets: mono 250-500 W and bifacial 600 W
- Grid-tied, off-grid, hybrid system types
- System loss factor (10%-25%)
- Roof area sufficiency check (sq ft)
- Annual & monthly kWh production estimate
- Peak-sun-hours method with NREL TMY-derived state data

# Made for
Solar installers, PV system designers, electrical contractors, EPC engineers, NABCEP exam candidates.

# Optional Pro Upgrade — $2.99 one-time
The following features require a separate one-time in-app purchase. They are not required to use the calculator:
- Calculation history (saved & searchable)
- PDF report export with NEC references
- Dark theme
- Ad-free experience