Grid Parity Rechner — Formel

What Is Grid Parity?

Grid parity occurs when the cost of renewable energy equals or falls below the retail price of grid electricity. Beyond grid parity, renewables save money compared to buying from the utility.

Formula

Savings per kWh = Grid Price - Renewable LCOE

Annual Savings = Savings per kWh x Annual Usage

If the savings per kWh is positive, the renewable source has achieved grid parity. The parity ratio shows how much cheaper (or more expensive) the renewable source is relative to grid power.

Lösungsbeispiel

Solar LCOE of $0.10/kWh vs grid price of $0.15/kWh for a home using 10,000 kWh/year.

  1. Savings per kWh = $0.15 - $0.10 = $0.05
  2. Annual savings = $0.05 x 10,000 = $500/year
  3. Parity ratio = 0.15 / 0.10 = 1.50 (grid is 50% more expensive)