Actual Cash Value (ACV)
The depreciated value of your solar equipment at the time of a loss. ACV = replacement cost minus depreciation. For a 5-year-old solar system, ACV may be 20–30% less than what it costs to replace. Always choose RCV over ACV if possible.
Agreed Value
A settlement basis where you and the insurer pre-agree on the value of your solar system. If it's destroyed, you receive that agreed amount — no depreciation, no dispute. Available from Liberty Mutual for premium systems.
Battery Storage System
Energy storage equipment (Tesla Powerwall, Enphase IQ Battery, LG Chem RESU) that stores excess solar energy. Requires explicit declaration to your insurer — not automatically covered by most homeowners policies.
Coverage A (Dwelling)
The section of a homeowners policy covering the structure of your home. Solar panels should be covered here, not under Coverage C (personal property). Coverage A typically has higher limits and better terms.
Dwelling Coverage Limit
The maximum your insurer will pay to rebuild your home. This limit should include your solar system's replacement cost value — if it doesn't, you're underinsured.
Endorsement / Rider
An addition to your standard homeowners policy that expands coverage — for example, a solar panel rider that explicitly covers your system. The most common way residential solar homeowners add comprehensive solar coverage.
Equipment Breakdown Coverage
Insurance covering mechanical or electrical failure of solar equipment — inverters, control boards, optimizers — from non-external causes. Almost always excluded from standard homeowners policies; often available as a commercial add-on.
High Fire Hazard Severity Zone (HFHSZ)
A California state designation for areas at elevated wildfire risk. Solar panels in HFHSZs may face wildfire exclusions from standard insurers. Allstate offers the most comprehensive HFHSZ solar coverage. See our California guide.
Hurricane Deductible
A separate deductible for hurricane or wind damage, expressed as a percentage of your home's insured value (typically 1–5% in coastal states). Can be $8,000–$25,000 on a typical coastal home — understand this before storm season.
Inland Marine Floater
A type of commercial insurance policy covering movable or specialized equipment. Often used for commercial solar installations. Covers solar equipment on an all-risk basis with values agreed at policy inception.
Lost Energy Production Reimbursement
A premium coverage feature (offered by Allstate and some specialty insurers) that pays for the energy value your system can't generate while under repair. Typically $0.10–$0.15 per kWh of lost production.
NEM 3.0
California's Net Energy Metering 3.0 policy (effective 2023), which changed solar export compensation and pushed homeowners toward battery storage. NEM 3.0 systems with batteries have higher insurance needs. See California guide.
Replacement Cost Value (RCV)
Pays what it costs to replace your solar panels with equivalent new equipment at current market prices — with no deduction for depreciation. The best settlement basis for solar insurance. Always choose RCV over ACV.
Solar Equipment Floater
A residential or commercial policy that covers solar equipment separately from your homeowners policy. Useful if your homeowners insurer won't provide adequate coverage, or for commercial installations.
Sub-limit
A coverage cap for a specific category within a policy. Example: a homeowners policy may have a $500,000 dwelling limit but a $25,000 sub-limit for solar equipment. Ensure your solar sub-limit covers your system's full replacement cost.
Thermal Runaway
A dangerous condition in lithium battery cells where heat generates more heat, potentially causing fire. Battery fires from thermal runaway are typically excluded from standard homeowners policies as 'equipment failure' rather than external fire damage.
Wildland-Urban Interface (WUI)
The zone where developed land meets undeveloped wildland — highest wildfire risk for homeowners. Colorado WUI communities include Boulder, Jefferson, and Larimer county foothills. Insurance availability and wildfire coverage vary significantly in WUI zones.
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