GetSunScore Analysis: Levelized Cost of Energy (LCOE)
Definition and Solar Context
Levelized Cost of Energy (LCOE) is a standardized measure of the average net present cost of electricity generation for a generating plant over its operational life. In residential solar analysis, LCOE represents the all-in cost of a solar system per kilowatt-hour produced.
LCOE can help compare lifetime generation costs. The current GetSunScore calculator does not produce an LCOE figure; it provides screening ranges for system cost, savings, and simple payback.
What Does LCOE Mean?
LCOE is calculated by dividing the cumulative lifecycle costs of an energy system (including capital, installation, operation, and maintenance) by its total estimated energy output. The result is expressed as a cost per unit of energy (Typically cents/kWh).
By normalizing costs across the systems' lifetime, LCOE provides a metric for evaluating energy projects with divergent cost structures — such as solar (high upfront capital, low operating cost) versus traditional grid power.
Why LCOE Matters in Modeling
LCOE is a separate economic comparison metric, not the basis of the current SunScore. A household's electricity bill also includes plan and delivery terms that an LCOE comparison alone cannot capture.
A rigorous LCOE calculation would need explicit cost, operating-expense, lifetime-production, and discount-rate assumptions. No federal credit is automatically applied to current GetSunScore estimates. See the calculator methodology for the inputs actually used.
How LCOE Applies in Texas
Texas solar output varies by location, and retail electricity terms vary by household. Current GetSunScore city estimates use representative PVWatts production yields and documented cost scenarios; they are not territory-specific LCOE calculations.
A retail-rate comparison is only one part of the economics. Self-used energy can offset purchases, while exported energy may earn a different, plan-dependent credit. Neither a low LCOE nor grid parity guarantees a lower bill.
Frequently Asked Questions
LCOE represents the per-kilowatt-hour cost of electricity generation over a system's life. It allows for direct cost comparison between different energy technologies, such as solar versus grid-supplied electricity.
GetSunScore's current calculator does not report LCOE. It estimates production, cost, savings, and simple payback ranges. LCOE is a separate lifetime-cost metric that would require additional assumptions about operating costs and financing.
LCOE for residential solar in Texas varies based on installation cost, system size, and local irradiance. High-irradiance areas in Western Texas Typically achieve lower modeled LCOE figures than areas with less annual sunlight.
A qualifying credit can affect an owner's net cost in a historical analysis, but GetSunScore does not deduct incentives or calculate LCOE. Under current IRS guidance, the federal residential clean energy credit is unavailable for expenditures after December 31, 2025.
Comparing a solar LCOE with a retail rate can be informative, but it does not by itself establish bill savings: self-consumption, export credits, fixed charges, and plan terms also matter.
This page defines LCOE; GetSunScore does not publish an LCOE result for each city or visitor. Current calculator assumptions and source dates are documented in the methodology.