Solar Savings Calculator — Formula

## How Solar Savings Are Calculated

Solar panels produce electricity based on system size, sunlight hours, and system efficiency (typically ~80%).

### Formula

**Daily Production = System kW x Sun Hours x 0.80 (efficiency)**

**Annual Savings = Daily Production x 365 x Electricity Rate**

**Break-Even = System Cost / Annual Savings**

Exemplo Resolvido

6 kW system, 5 sun hours/day, $0.14/kWh, $15,000 cost after incentives.

  1. Daily production = 6 x 5 x 0.80 = 24 kWh
  2. Annual production = 24 x 365 = 8,760 kWh
  3. Annual savings = 8,760 x $0.14 = $1,226
  4. Break-even = $15,000 / $1,226 = 12.2 years