Chief Appraiser Says
Reading the actual guideline text below — never a general AI guess
What "Solar Rapid Shutdown Switch" Actually Means
Here's what that switch or label is really about: When solar panels are installed on a building, the National Electrical Code requires a rapid shutdown function so firefighters can quickly turn off the high-voltage electrical current running through the roof during an emergency — they need to be able to de-energize those lines fast rather than working around live power. It's purely a life-safety requirement for first responders, not something related to how much electricity your system produces or how big it is. Buyers and sellers sometimes see that shutdown switch or placard near the main electrical panel or utility meter and mistakenly think it affects system performance or sizing, but it doesn't — it's just a safety code mandate.
Straight from Solar PV: Kilowatt & System Basics Reference (EIA/NREL, NEC 690.12) — nothing added.
Here's what that switch or label is really about: When solar panels are installed on a building, the National Electrical Code requires a rapid shutdown function so firefighters can quickly turn off the high-voltage electrical current running through the roof during an emergency — they need to be able to de-energize those lines fast rather than working around live power. It's purely a life-safety requirement for first responders, not something related to how much electricity your system produces or how big it is. Buyers and sellers sometimes see that shutdown switch or placard near the main electrical panel or utility meter and mistakenly think it affects system performance or sizing, but it doesn't — it's just a safety code mandate.
Straight from Solar PV: Kilowatt & System Basics Reference (EIA/NREL, NEC 690.12) — nothing added.
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→ Solar PV Kilowatt and Capacity Reference (Chief Appraiser Document Library)
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© Copyright Notice: © 2026 Fannie Mae. Excerpts shown for research and reference only. Full document available at selling-guide.fanniemae.com. Reproduction restricted to Fannie Mae-approved lenders.
© Copyright Notice: © Fannie Mae. UAD 3.6 / URAR reference materials shown for research and reference only. Full documents available at fanniemae.com/uad. Reproduction restricted per Fannie Mae copyright policy.
© Copyright Notice: © Freddie Mac. Excerpts shown for research and reference only. Full document available at guide.freddiemac.com. Reproduction restricted per Freddie Mac copyright policy.
Relevant News
Recent public coverage related to this topic — cited, not reproduced
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.
Read full story at Open Door →
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.
Read full story at Effective Agents / Fannie Mae guidelines →
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produce" for a specific listing, rather than relying on a rule-of-thumb number pulled from a different climate or roof. The rapid shutdown switch or label — a real, unrelated code…
Solar PV: Kilowatt & System Basics Reference (EIA/NREL, NEC 690.12) · Solar_PV_Kilowatt_and_Capacity_Reference.txt · Page 11
produce" for a specific listing, rather than relying on a rule-of-thumb number pulled from a different climate or roof. The rapid shutdown switch or label — a real, unrelated code requirement. Sellers and buyers sometimes notice a labeled shutdown switch or placard near the main electrical panel or the utility meter and assume it's related to system sizing or production — it isn't. It's a life-safety requirement. The National Electrical Code, in the model language most states and jurisdictions have adopted (2023 NEC Section 690.12), requires PV system circuits installed on or in a building to include a rapid shutdown function, so firefighters can de-energize the high-voltage DC conductors on a roof quickly during an emergency rather than working around
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[Excerpt withheld: the fair-use viewing limit for this document has been reached for this session. See the source document itself for more.]
Solar PV: Kilowatt & System Basics Reference (EIA/NREL, NEC 690.12) · Solar_PV_Kilowatt_and_Capacity_Reference.txt · Page 14
[Excerpt withheld: the fair-use viewing limit for this document has been reached for this session. See the source document itself for more.]
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✓ Lender Requirements for Properties with Solar Panels that are Leased or Covered by a Power Purchase Agreement The property must maintain access to an alternate source of…
Fannie Mae Selling Guide · Selling Guide - 06-03-2026.pdf · Page 281
· View at official source (selling-guide.fanniemae.com) →
✓ Lender Requirements for Properties with Solar Panels that are Leased or Covered by a Power Purchase Agreement The property must maintain access to an alternate source of electric power that meets community standards. The lease or power purchase agreement must indicate that • any damage that occurs as a result of installation, malfunction, manufacturing defect, or the removal of the solar panels is the responsibility of the owner of the equipment and the owner must be obligated to repair the damage and return the improvements to their original or prior condition (for example, sound and watertight conditions that are architecturally consistent with the home); • the owner of the solar panels agrees not to be named loss payee (or