☀️ Solar Panel Calculator

Calculate your solar panel requirements, installation costs, energy savings, and return on investment.

Monthly Electricity Bill ($)

OR Monthly Usage (kWh)

Electricity Rate ($/kWh)

Annual Rate Increase (%)

Your Location

Peak Sun Hours/Day

System Efficiency (%) Account for losses (shading, dust, temperature)

Roof Orientation

Desired System Coverage (%) 100% = cover all usage, >100% = excess energy

Panel Wattage (W)

Panel Cost per Watt ($) Typical range: $2.00 - $3.50/W

Installation Cost ($)

Federal Tax Credit (%) ITC: 30% through 2032

State/Local Incentives ($)

Net Metering Available?

Excess Energy Rate ($/kWh) Rate paid for excess energy sold

Add Battery Storage?

Battery Capacity (kWh)

Battery Cost ($)

Updated on February 12, 2026