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Frequently Asked Questions

What are the most important publications for homeowners researching solar? The DOE’s Homeowner’s Guide to Going Solar, NREL’s annual U.S. Solar Photovoltaic System Cost Benchmark, and SEIA’s residential solar buyer’s guide are the three most accessible and authoritative starting points. These cover the decision process, cost expectations, and policy landscape with data that is updated annually.

What is NREL’s Tracking the Sun publication? Tracking the Sun is NREL’s annual data product documenting the characteristics, costs, and performance of over 3 million residential and small commercial solar installations across the United States. It is the primary source for understanding how residential solar costs, system sizes, and technology choices have evolved over time.

Where can homeowners find solar publications specific to their state? State energy offices publish solar guides specific to local incentives, utility policy, and installer licensing requirements. DSIRE maintains links to state energy office resources alongside its incentive database. SEIA also publishes state-specific solar market fact sheets updated annually.

Are there peer-reviewed publications on residential solar system performance? Yes. NREL and Lawrence Berkeley National Lab publish peer-reviewed research on residential solar performance, cost trends, and policy impacts in journals including Progress in Photovoltaics and Energy Policy. These publications underpin the benchmark figures — $2.85/watt median installed cost, 0.5 percent annual degradation — used throughout industry guidance for homeowners.

Further Reading from Authoritative Sources