Calculadora de Retorno de Inversión Solar — Fórmula

How to Calculate Solar Payback Period

The solar payback period tells you how many years until your solar investment pays for itself.

Formula

Net Cost = System Cost * (1 - Tax Credit %)

Payback Period = Net Cost / Annual Savings

The US federal Investment Tax Credit (ITC) is currently 30% through 2032, significantly reducing the effective cost.

Ejemplo Resuelto

A $20,000 solar system with 30% tax credit saving $1,800/year on electricity.

  1. Tax credit: $20,000 * 30% = $6,000
  2. Net cost: $20,000 - $6,000 = $14,000
  3. Simple payback: $14,000 / $1,800 = 7.8 years
  4. 25-year savings: $1,800 * 25 - $14,000 = $31,000