Reading the actual guideline text below — never a general AI guess

What the Guidelines Say About Solar Panel Types, Inverters, Batteries, and Costs

Here's what the official guidelines tell us: We have research on solar system components and what homeowners typically pay to install them, drawn from national energy laboratories and industry pricing reports updated through 2026. We know that solar panels themselves have stronger market data supporting their value in home appraisals than batteries do, since far fewer home sales include confirmed owned batteries compared to panels alone—which means appraisers can usually find solid price comparisons for panels but may struggle to document what a battery specifically adds to a home's worth in most markets today. We can see that ownership matters greatly for appraisal purposes: whether panels are owned outright by the homeowner (through cash purchase, included in the home price, financed separately, or secured by their own loan) versus leased or covered by a power purchase agreement will determine how they're treated in financing and valuation. The excerpts shown here do not cover the specific installed costs for different panel types, inverter configurations, or battery chemistry details—those details exist in the source documents but are not included in these passages.

Straight from NREL, LBNL, EnergySage, BloombergNEF, Fannie Mae, Freddie Mac, FHA, VA, UAD 3.6, and Clark County Title 30 — nothing added.

Recent California data shows 5-10% premium for owned solar homes

California-specific data shows owned solar panels add 5–10% to home value (about $39,500–$79,000 on median homes), while leased panels generally do not add appraised value.

Fannie Mae appraisal guidelines exclude leased solar panels from property value

Under Fannie Mae's appraisal guidelines, leased solar panels, those under a power purchase agreement (PPA), or separately financed with a UCC lien may not contribute to appraised property value.