A solar panel inspection when buying a San Diego home means two separate checks: the ownership/financing status of the system (owned, leased, or PPA), and the physical condition of the array, roof penetrations, and inverter. A general home inspection assesses visible condition and how the panels affect the roof – but a dedicated solar evaluation confirms production and electrical performance.
Why Solar Changes the Math on a San Diego Home Purchase
San Diego has one of the highest rooftop-solar adoption rates in the country. Between strong sun, high SDG&E rates, and years of generous incentives, a huge share of resale homes here come with panels already on the roof. That is generally good news for a buyer – but only if you understand what you are actually buying. Solar is not a simple “it conveys with the house” feature. The contract behind those panels can be owned outright, leased, or tied to a power purchase agreement (PPA), and each one carries very different obligations.
The panels also sit on top of one of the most expensive components of the home: the roof. Every mounting bracket is a penetration through the roof covering, and how those penetrations were flashed and sealed has a direct bearing on leaks, decking moisture, and future repair costs. That is why a solar evaluation overlaps so closely with a roof inspection and should be part of your overall buyer’s inspection planning.
Owned vs Leased vs PPA: Know What Conveys
Before you worry about the hardware, find out who owns it. This single fact shapes price, financing, and your monthly costs for years. Ask the seller and your agent for the original solar contract early in escrow – do not wait until the inspection.
Owned (Cash or Paid-Off Loan)
Owned systems are the cleanest scenario. The panels are part of the real property, they add value, and there is no third party to deal with. If the system was financed and the loan is paid off, ask for documentation. If a solar loan is still outstanding, find out whether it is a standard loan or a PACE/HERO assessment attached to the property tax bill – PACE financing can complicate lending and sometimes must be paid off at sale.
Leased
With a lease, a solar company owns the panels and you pay a fixed (often escalating) monthly amount to use them. To buy the home you usually must assume the lease, which means qualifying with the solar provider and agreeing to the remaining term – frequently 15 to 20 years from original install. Read the escalator clause: many leases raise the payment a few percent every year, so a payment that looks reasonable today can climb meaningfully over the life of the agreement.
PPA (Power Purchase Agreement)
A PPA is similar to a lease, but instead of a fixed equipment payment you pay a per-kilowatt-hour rate for the power the system produces. You are buying electricity, not renting hardware. Like a lease, a PPA generally must be transferred and assumed at sale, and it usually has an annual rate escalator. The key question is whether that contracted rate still beats SDG&E – if rates have shifted, an older PPA may no longer be the bargain it once was.
For any leased or PPA system, confirm three things in writing: the transfer/assumption process and any fees, the remaining term, and the buyout option if you would rather own the system outright. Your lender will also want to see this, because lease and PPA obligations can affect your debt-to-income calculation.
What a Home Inspection Covers on a Solar System
A general home inspection in California is a visual, non-invasive assessment of readily accessible components. On a solar installation, that means an InterNACHI Certified Professional Inspector can typically observe and report on:
- Roof penetrations and flashing – how the mounts attach, visible sealant condition, staining, and signs of past leakage around the array
- Panel and racking condition – visible cracking, delamination, loose or corroded hardware, and obvious physical damage from the ground or accessible roof areas
- Inverter presence and apparent age – location, type (string vs microinverter), visible labeling, and whether it is powering on / showing fault lights
- Electrical connections and conduit – the visible run from the array to the main panel, disconnects, and obvious wiring concerns
- Roof loading and general suitability – whether the roof surface under and around the panels shows wear that may need attention
What a home inspection does not do is verify electrical production or test system output. A standard inspection will not climb the array to lift every panel, measure kilowatt output, or certify that the system is performing to spec. Those are the boundaries of a general inspection, and a good inspector will tell you plainly when something is outside that scope.
When to Bring in a Solar Specialist
If the system is a major part of why you are buying the home – or if anything looks off – a dedicated solar contractor or electrician can take the evaluation further than a visual inspection allows. Consider a specialist when:
- The inverter is approaching the end of its service life. String inverters often last roughly 10 to 15 years, while microinverters and panels typically carry longer warranties. A replacement inverter is a real cost you want to anticipate, not discover later.
- You want verified production data. A specialist can pull monitoring history or run testing to confirm the array is actually generating what the seller claims.
- The roof is older than the panels. If the roof covering is near end-of-life, panels may need to be removed and reset to re-roof – an added expense many buyers overlook.
- The disclosed contract terms are unclear, or there is a battery storage system that needs its own evaluation.
Roof Penetrations: The Hidden Cost San Diego Buyers Miss
Coastal and inland San Diego roofs both take a beating – salt air near the coast, intense UV inland, and concentrated rain during a short wet season. Solar mounts add dozens of penetrations to that surface. When flashing is done well, it is a non-issue for decades. When it is done poorly, water can track under the covering and into the decking, where it goes unnoticed because the panels hide the evidence.
This is exactly why pairing your solar review with a thorough roof assessment matters. If you are buying in a wetter or coastal pocket of the county, our guide on getting a roof inspection before the rain walks through what to look for, and thermal imaging for coastal moisture explains how infrared can flag damp decking that the eye cannot see. Both are useful context when an array is covering a large portion of the roof.
How This Fits Your Overall Inspection
For most buyers, the smart sequence is straightforward: order a comprehensive buyer’s inspection that includes a close look at the roof and the visible solar components, get the ownership/financing documents from the seller during escrow, and then decide whether a solar specialist is warranted based on what surfaces. If you are early in the process, our first-time home buyer inspection guide lays out the full timeline, and the home inspection cost guide for San Diego explains how pricing depends on square footage, age and access. Solar-equipped homes in communities like Carlsbad are common, so this comes up constantly in our coastal North County inspections.
The Real Estate Inspection Company is led by Joseph Romeo, an InterNACHI Certified Professional Inspector and CSLB licensed General Contractor (License #1113143), serving all of San Diego County from San Marcos. Pricing depends on the home’s square footage, age and access – see our fee schedule or call (619) 752-4399 to discuss your inspection on a solar-equipped home.
