Editorial policy

Accuracy first

Numbers carry a data class, a source, and a date. We prefer ranges over false precision, and “we don’t know” over a guess. Estimates are labeled estimates.

Corrections

Found an error? Tell us. We correct promptly and note the correction date on the affected record. Substantive errors get a changelog entry on the relevant page.

Independence

Analysis is produced independently of commercial relationships. See disclosures. Paid placement is always labeled and can never influence data or rankings.

What we will not publish

• Claims that a specific installer or lender is fraudulent without evidence.
• Guaranteed savings, payback, or home-value increases.
• “Free solar” framing without explaining the financial structure.
• Tax, legal, or investment advice (we provide general information and point to professionals).
• Invented ZIP-level price data.

Diversity of data

Where sources conflict (e.g., marketplace vs NREL medians), we show the spread and explain it rather than hiding it.