What is solar panel replacement?
Solar panel replacement and reinstallation (often referred to as an “R&R”) is a specialized service involving the careful detachment, secure storage, and subsequent remounting of an existing photovoltaic array. The primary driver for this service is home maintenance; because a high-quality solar system can outlast a standard asphalt shingle roof, homeowners frequently need the panels moved out of the way so a roofing contractor can perform a tear-off and replacement. Additionally, this service covers the upgrading of outdated, degrading solar arrays. If you have older panels producing a fraction of modern wattages, a solar upgrade can drastically revitalize your home’s energy production.
Engaging professionals to remove and reinstall solar panels is absolutely critical. Solar equipment is fragile, heavy, and involves high-voltage live wires that pose a severe safety hazard if handled improperly. A competent crew documents the exact layout and wiring before dismantling the array, caps all electrical conduits, unbolts the racking and stores the panels securely on your property. Once your new roof is completed, they install new waterproof flashing and mounting hardware, reattach the panels, and perform a full system diagnostic to ensure your investment is producing power just as efficiently as the day it was first installed.
Why more systems need this every year
Home solar grew fast after 2012, so a large number of systems are now reaching the age when roofs and inverters need attention. In the public installation records (Tracking the Sun, Lawrence Berkeley National Laboratory), about 688,000 home systems, 23% of those on record, were installed before 2016, so they are now more than ten years old. That is when many central inverters reach the end of their 10- to 12-year warranty and when asphalt roofs installed at the same time start to need replacing.
Many of those systems were installed by companies that no longer exist: SunPower, Titan Solar, Verengo, Sungevity and dozens of regional installers. If that’s your case, the panel and inverter warranties still come from the manufacturers, but you’ll need a different company for the removal and reinstallation. Ask whether it will take responsibility for leaks at the new mounting points, and for how long.
How solar panel replacement works
- System Audit and Documentation: Technicians arrive on-site, turn off the system at the main breaker, test the voltage, and photograph the array’s layout and wiring configuration.
- Safe Detachment: The panels are carefully unbolted from the rails, disconnected from their microinverters or optimizers, and lowered to the ground.
- Racking Removal: The aluminum rails and mounting stanchions are removed, leaving the roof bare for your roofing contractor to begin their work.
- Secure Storage: The panels and sensitive electronic components are stacked safely on-site, covered, and secured against weather and damage.
- New Hardware Installation: Once the new roof is finished, the solar crew returns to install new mounting stanchions, utilizing fresh waterproof sealants and heavy-duty flashing.
- Reinstallation and Testing: The original panels (or upgraded replacements) are mounted to the rails, re-wired, and the system is turned back on and tested for proper voltage and communication.
Cost factors
The cost of an R&R service is primarily driven by labor and the complexity of the original installation.
| Factor | Impact on cost |
|---|---|
| System size | More panels require more labor hours to detach, lower to the ground, and remount, directly increasing the cost. |
| New mounting hardware | Even if the panels are reused, the old flashing and mounting feet must be discarded. Purchasing new, watertight hardware adds to the material costs. |
| Roof pitch and height | Steep roofs or two-story homes require extensive safety rigging and slower movement, increasing labor time. |
| Equipment upgrades | If you choose to replace old panels or failing inverters during the reinstallation process, equipment costs will be added. |
When this service is the right fit
- Roof replacements: You are hiring a roofer to replace the shingles under your existing solar array.
- Major roof repairs: You have a leak or structural damage directly beneath the solar panels that needs immediate attention.
- System upgrades: Your current panels are 15+ years old, severely degraded, and you want to swap them for high-efficiency modern modules.
- Selling the home: You need to repair the roof to pass a buyer’s inspection but want to keep the solar system operational for the sale.
Questions to ask your installer
- Do you provide the new flashing and mounting hardware, or do I need to pay for that separately?
- How and where will the panels be stored while the roofers are working?
- Who is responsible for coordinating the timeline with my roofing contractor?
- Will this process void any existing warranties on my solar equipment?
- Do you perform a full system diagnostic before removal to establish a baseline for performance?
- What happens if a panel is accidentally broken during the removal or reinstallation process?
What to watch out for
When hiring a company for solar panel replacement, the biggest mistake is letting your roofing contractor remove the panels. Most roofers are not licensed electricians and lack the training to safely handle high-voltage DC wiring or delicate microinverters, often resulting in voided warranties or electrocution hazards. Watch out for solar companies that try to reuse the old flashing or mounting feet; these components suffer metal fatigue and must be replaced to ensure the new roof won’t leak. Finally, ensure the solar company performs a pre-removal inspection. If a panel is already dead before they touch it, you need to know, so you don’t blame them for the failure after reinstallation.