Long-form, source-cited explainers on the parts of residential solar that a calculator can't fit into a single number. Written for an intelligent reader who isn't a domain expert.
Current IRS Section 25D guidance, including the post-2025 cutoff and carryforward notes for older qualifying installations.
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How utilities compensate rooftop solar exports — and why California's NEM 3.0 transition is a leading indicator for the rest of the country.
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Annual kWh, peak sun hours, performance ratio, and why "more panels" is not always the right answer — even in sunny markets.
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A practical decoder for residential rate structures, and how each one changes the economics of going solar.
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Four inputs. Sixty seconds. Every number traceable to a public source.