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So, the LGC value for year X = (LGC price per certificate) * (energy produced in year X) * ((1 - regression rate)^(X-1))
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STCs and LGCs combined
While STCs only apply on systems <100kW, it is common to combine a 99kW system with another system and present them in the same proposal so that the client can take into consideration both the STC point of sale discount on the first 99kW, and the LGC income on the additional system. This is done in SolarPlus on the Pricing > Tax and Rebates page as follows:
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