Levelized Cost of Energy (LCOE) is the total lifecycle cost of an energy system divided by total energy production, expressed as cost per kilowatt-hour (kWh). LCOE enables fair comparison between energy sources with different capital costs, lifespans, and operating expenses.
LCOE Calculation
LCOE equals total system costs (installation, maintenance, financing) divided by lifetime energy generation in kWh. Solar LCOE typically ranges from $0.05 to $0.15 per kWh depending on location, system size, and financing. Residential systems average $0.10 to $0.12 per kWh, while utility-scale systems achieve $0.04 to $0.08 per kWh due to economies of scale. LCOE includes 25 to 30 year system lifespan and accounts for degradation at approximately 0.5 percent annually.
Energy Source Comparison
Solar LCOE increasingly competes with fossil fuels: natural gas averages $0.06 to $0.10 per kWh, coal $0.08 to $0.15 per kWh, and wind $0.04 to $0.08 per kWh. Grid electricity rates average $0.12 to $0.16 per kWh nationally, making solar LCOE highly competitive. High-sun regions and financed systems further reduce LCOE below grid rates.
Strategic Planning
Utilities and corporations use LCOE to select cost-effective energy sources and evaluate long-term procurement strategies. LCOE projections showing continued solar cost declines (declining 3 to 5 percent annually) support aggressive renewable energy adoption. This metric guides energy policy and investment decisions globally.