SOLAR
How to evaluate solar savings claims
Savings estimates are projections built from assumptions. Understand those assumptions before treating the projection as a promise.
Production assumptions
Ask what weather data, shading, orientation, equipment performance and degradation assumptions were used.
Utility assumptions
Rates, fixed charges, export compensation and policy can change. Ask which current utility rules are reflected.
Separate guarantees from projections
Clarify whether any production figure is contractually guaranteed or simply modeled.
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