Frequently Asked Questions
Your Questions Answered.
Whether you're managing a commercial or utility-scale solar asset that's underperforming, dealing with storm damage, or planning for end-of-life decommissioning, this FAQ covers the questions we hear most from system owners, asset managers, and O&M providers.
Feel free to browse answers below across six categories:
> System Repowering & Upgrades
> Severe Weather & Emergency Response
> Decommissioning & Special Projects
> Working with Rural Solar Restoration
> Industry & Technical Knowledge
If your question isn't covered here, our team is available to discuss your specific situation — call us at (720) 744-0493 or submit a project inquiry.
System Repowering & Upgrades
How do I know when my commercial solar system needs to be repowered rather than repaired?
If your system is experiencing chronic underperformance across multiple components — not just a failed inverter or a handful of damaged panels — repowering is likely the smarter path. The key indicators are cumulative production losses that repair alone won't recover, widespread module degradation beyond the expected rate, serial defects affecting a significant portion of the array, or aging inverter technology that no longer integrates well with modern monitoring and grid requirements. We typically recommend a professional assessment first to quantify production loss and model the economics of repair versus repower. In many cases, a full or partial repower also creates an opportunity to extend the system's useful life by 15–20 years.
What's the difference between a solar repower and a full system replacement?
A solar repower typically involves replacing one or more major system components — most often the modules, inverters, or racking — while retaining other parts of the infrastructure that are still serviceable. A full system replacement tears out everything, including the electrical balance-of-system and often the site preparation. Repowering is almost always more cost-effective when the racking, wiring infrastructure, or interconnection equipment is still in good condition. It also tends to have a faster execution timeline. We help clients determine which components are worth preserving and which need to go, making that determination based on field inspection data rather than assumptions.
Can solar panels be replaced without replacing the inverters and racking?
Yes, and it's one of the most common scopes we execute. Module-only replacements make sense when the inverters have remaining useful life, the racking is structurally sound, and the primary issue is panel-level degradation or damage. That said, there are compatibility considerations — newer modules may have different voltage and current characteristics that need to be evaluated against the existing inverter's input parameters. We perform that compatibility analysis before any replacement to ensure the new modules will operate within spec and won't void inverter warranties or create performance mismatches.
How long does a commercial solar repower take from assessment to completion?
Timeline varies by system size, component availability, and permitting requirements, but a realistic range for a mid-size commercial system (250 kW to 1 MW) is 6 to 16 weeks from executed contract to energization. Assessment and engineering typically take 2 to 4 weeks. Procurement lead times for modules and inverters are the most variable factor — current market conditions can put quality equipment 4 to 10 weeks out. Installation itself is often the shortest phase. We provide project-specific schedule estimates after the assessment phase and manage procurement proactively to avoid avoidable delays.
What happens to the old panels when a commercial solar system is repowered?
Disposition of removed panels depends on their condition and the owner's priorities. Panels that retain functional output are sometimes resold to secondary markets, donated to community solar programs, or repurposed for lower-demand applications. Panels that are damaged beyond usefulness need to be recycled responsibly — solar panels contain materials including lead, cadmium, and glass that should not go to general landfill. We work with certified recycling partners and can manage the full removal-to-recycling chain as part of our repower scope. State regulations on solar panel disposal vary and are evolving; we help clients navigate applicable requirements.
Severe Weather & Emergency Response
How quickly can you mobilize for emergency solar repairs after a hail storm?
Our nationwide team can quickly have a crew on-site. Early contact is important: the sooner you reach us after a storm event, the more scheduling flexibility we have. We also recommend engaging us for a rapid drone assessment before committing to a repair scope, as this ensures you're not repairing panels that should be replaced and helps document losses for insurance purposes.
What types of solar damage are typically covered by insurance after a severe weather event?
Most commercial property insurance policies cover physical damage to solar equipment caused by named perils including hail, wind, flooding, and fire. However, coverage for lost production — the revenue lost while the system is offline or underperforming — typically requires a separate business interruption or energy production endorsement. We strongly recommend reviewing your policy's solar-specific language before an event occurs, not after. We work regularly with insurance adjusters and can provide documentation, drone imagery, and repair cost estimates in formats that facilitate claims processing. Getting the right documentation early makes a meaningful difference in claim outcomes.
How do I know if my solar panels have hail damage if they're still producing power?
This is one of the most common and costly misunderstandings in commercial solar operations. Hail-damaged panels frequently continue producing power at or near normal levels in the short term, because the photovoltaic cells can remain functional even when the glass is cracked, the encapsulant is compromised, or the junction box is damaged. The real risk is that compromised panels degrade much faster, are more vulnerable to moisture ingress leading to delamination and cell corrosion, and create fire or arc fault hazards. Thermal imaging and drone assessment can identify damaged panels that aren't yet showing measurable production losses — this is the most reliable way to understand your actual exposure after a hail event.
What's the difference between cosmetic and functional hail damage to solar panels?
Cosmetic hail damage — surface marks on the glass that don't penetrate the cell layer or compromise the laminate — may not have a meaningful impact on near-term performance or longevity. Functional damage is a different matter: cracked glass that allows moisture into the cell stack, micro-cracks in the silicon cells that reduce output under certain irradiance conditions, damage to the back sheet, or compromised junction box seals all represent functional damage with real performance and safety implications. The distinction matters enormously for insurance claims and repair scoping. We assess damage systematically and help clients make that distinction rather than assuming all visible damage is equal or, conversely, that surviving production means there's no damage.
Can wind-damaged solar racking be repaired, or does it always need to be fully replaced?
It depends on the nature and extent of the damage. Racking systems that have experienced localized damage — a failed clamp, a bent rail segment, or a single post anchor failure — are often repairable. Racking that has experienced significant structural deformation, especially in systems that have shifted or buckled under extreme wind load, typically needs replacement because the original engineering assumptions about load distribution are no longer valid. Using repaired but structurally compromised racking creates ongoing risk and can void manufacturer warranties. We assess racking damage from both a physical and engineering standpoint and are conservative when it comes to structural integrity — the cost of a repair that fails is always higher than the cost of a proper replacement.
What should I do in the first 24 hours after a storm damages my solar installation?
First, prioritize safety — do not approach or enter damaged areas of a solar installation without qualified personnel, as downed panels, exposed wiring, and compromised inverters present real electrical and physical hazards. Notify your O&M provider and insurance carrier as soon as possible, as most policies have prompt notification requirements. Document visible damage with photos and video from a safe distance. If your monitoring system is functional, capture current production data as a baseline for loss calculations. Then contact us for a rapid assessment — ideally a drone survey before any debris is cleared or emergency tarping is applied, since that initial condition documentation is often critical for insurance claims.
What happens to solar panels and equipment damaged by brushfire, and can a fire-affected system be restored?
Brushfire damage to solar installations presents a distinct set of challenges compared to hail or wind events. Direct flame exposure typically destroys panels completely — the laminate, encapsulant, and back sheet are combustible, and fire-exposed panels are not repairable or safely reusable. However, systems adjacent to a fire zone may have sustained heat damage, smoke contamination of inverter components, melted wiring insulation, or compromised junction box seals without visible flame damage to the panels. These require careful component-by-component assessment before the system is re-energized. Racking in fire-affected areas should also be inspected for thermal stress and anchor integrity. For insured losses, fire damage is typically a covered peril, and our documentation process supports the claims workflow. We have experience working in post-fire environments and understand the site safety protocols required for assessments in these conditions.
Assessments & Inspections
What does a commercial solar drone assessment include, and what can it detect that a ground inspection can't?
A commercial drone assessment uses aerial photography combined with thermal infrared imaging to evaluate the full array from above. The thermal imaging component is what makes it particularly valuable — it reveals hotspots caused by cell-level defects, bypass diode failures, soiling patterns, shading anomalies, and delamination that are invisible to the naked eye and nearly impossible to identify systematically at ground level. A drone assessment also captures the physical condition of racking, module framing, and string layout, and produces georeferenced documentation of the entire system. For large commercial and utility-scale sites, it provides comprehensive coverage in a fraction of the time that a full ground inspection would require.
How often should a commercial or utility-scale solar system be professionally inspected?
As a baseline, we recommend a comprehensive inspection every 12 to 18 months for commercial systems, with drone-based thermal assessments annually. Systems that have experienced weather events, are showing production anomalies in monitoring data, or are approaching major warranty milestones (5-year, 10-year, 12-year) should be inspected regardless of schedule. Many asset managers and O&M providers conduct annual ground inspections as part of their standard service but don't include thermal imaging — adding aerial thermal assessment to that program significantly increases the diagnostic value. For utility-scale assets, more frequent assessment cadences tied to production monitoring data thresholds are common.
What is a solar system commissioning, and why does it matter for new and repowered installations?
Commissioning is the process of systematically verifying that a newly installed or repowered solar system is operating in accordance with its design specifications before it is handed over to the owner or O&M provider. It includes electrical testing of strings and combiners, inverter configuration verification, monitoring system integration checks, and documentation of baseline performance metrics. Commissioning matters because installation errors — miswired strings, misconfigured inverters, improperly grounded equipment — are far easier and cheaper to correct at startup than after months of suboptimal operation. For repowers, commissioning also creates a documented baseline that makes future performance comparisons meaningful.
What are the most common defects found during commercial solar site inspections?
In our field experience, the most frequently identified issues are: hotspots caused by cell cracks or bypass diode failures (often from undetected hail or manufacturing defects); soiling and shading losses that have gone unmeasured because monitoring granularity is insufficient; inverter faults that have been cleared automatically without being investigated; racking corrosion or fastener loosening in older ground-mount systems; and wiring degradation at conduit penetrations and junction box seals. On systems over 7 to 10 years old, delamination and encapsulant discoloration become increasingly common. Many of these issues are invisible in production data until they have caused significant cumulative losses.
Can thermal imaging detect underperforming panels before they cause measurable production loss?
Yes, and this is one of the strongest arguments for regular thermal assessment as a proactive tool rather than a reactive one. Thermal imaging can identify cell-level anomalies — hotspots, inactive cell strings, early-stage delamination — that are reducing individual panel efficiency without yet generating a measurable signal at the string or inverter level. A single underperforming panel in a series string may reduce that string's output by 5 to 15 percent, but if you're monitoring at the inverter level, that loss can be easily masked by normal weather variability. Catching these issues early through thermal imaging allows targeted replacement of problem panels before losses compound and before defective panels create fire or arc fault risks.
Decommissioning & Special Projects
What is involved in decommissioning a commercial solar system at end of life?
A complete decommissioning involves safe disconnection and de-energization of all electrical components, removal of panels, inverters, and racking, removal or abandonment in place of underground conduit and wiring (depending on site requirements), and restoration of the site to the condition specified in the original land lease or permit. For ground-mount systems, this often includes concrete anchor removal and grading. For rooftop systems, it includes verification that the roof surface is intact and waterproofed. Proper documentation — including final electrical signoff and waste disposition records — is typically required to close out permits and satisfy lease obligations. We manage the full scope and can coordinate with recycling and resale partners for equipment disposition.
Are solar panel disposal and recycling requirements different by state?
Yes, and this is a rapidly evolving area of environmental regulation. Washington State has the most established solar panel recycling program in the U.S., with a producer responsibility framework that requires manufacturers to fund end-of-life recycling. Several other states have pending or recently enacted legislation moving in a similar direction. Regardless of state law, commercial solar owners should be cautious about landfill disposal of panels that contain hazardous materials — depending on panel composition, they may qualify as hazardous waste under EPA RCRA regulations, which carries significant liability. We track applicable requirements by state and help clients disposition removed panels in a compliant, documented manner.
What are the risks of improper solar system decommissioning, and how can they be avoided?
The most significant risks are: electrical safety incidents during removal if systems are not properly de-energized and isolated; environmental liability from improper disposal of hazardous panel materials; contractual default if land lease restoration requirements are not met; and permit closeout issues that can affect the landowner's ability to use the site for future development. Less obvious but equally real is the risk of damage to underlying infrastructure — roofing membranes, ground anchors, and underground conduit — if removal is done by crews without specific solar decommissioning experience. We approach decommissioning with the same engineering discipline as new installation and maintain documentation through every phase.
Why would an owner need module removal and reinstallation without full decommissioning?
There are several common scenarios: roof replacement or repair requiring temporary removal of rooftop panels; structural modifications to a building that affect the mounting surface; installation of additional rooftop equipment that requires reconfiguring the array layout; or relocation of a system from one site to another. Module removal and reinstall is more complex than it sounds — modules need to be properly documented by position for reinstallation, string configurations need to be restored accurately, and reinstalled systems need to be recommissioned before being returned to service. We handle these projects regularly and have the documentation and logistics systems to manage large-scale temporary removal and reinstall efficiently.
What causes ballast block failure in ballasted rooftop solar systems, and when do they need to be replaced?
Ballasted rooftop systems use concrete blocks rather than roof penetrations to hold racking in place, relying on weight and wind engineering calculations to keep the array stable. Ballast block failure can occur due to block deterioration from freeze-thaw cycling, spalling from moisture infiltration, or simply blocks that have shifted over time and no longer meet the original wind load design. In some cases, original ballast calculations were done for lower wind speed assumptions than current building codes require — meaning the system is technically out of compliance even if the blocks appear intact. We inspect ballast systems for physical deterioration, verify positioning against original layout drawings, and assess structural adequacy relative to current local wind requirements.
Working With Rural Solar Restoration
What geographic areas do you serve for commercial solar repair and restoration?
We operate nationwide. Our team is based in Colorado and deploys to projects across the country, with crew mobilization capability to all continental U.S. states. We're particularly experienced in markets with high solar density and active severe weather exposure — the Mountain West, Midwest, Southeast, and Mid-Atlantic regions — but we regularly work on the coasts and in other regions as well. For utility-scale projects in less common geographies, we conduct a logistics assessment as part of scoping to ensure we can staff and execute effectively. Our supplier network is national, which means we're not dependent on regional distributors for component sourcing.
Can you work alongside an existing O&M provider, or do you require primary contractor status?
We work in both configurations regularly. For projects that fall outside an O&M provider's scope — major repowers, severe weather remediation, decommissioning, or specialized assessments — we function as a specialist subcontractor or co-contractor, fully coordinating with the O&M team. We're used to working within existing service structures and understand the importance of communication, documentation handoffs, and not disrupting ongoing maintenance relationships. For projects where there is no active O&M provider, we can take primary contractor status. In either case, we establish clear scope boundaries at the outset to avoid overlap or confusion.
What size solar projects do you typically work on — is there a minimum system size?
Our core expertise is commercial and utility-scale systems, generally starting around 100 kW and ranging into multi-megawatt utility projects. We don't have a hard minimum, and we do occasionally take on smaller commercial systems when the project has specialized characteristics that align with our capabilities — complex weather damage, unusual decommissioning requirements, or assessment needs. What we're not set up for is residential service. Our crews, logistics, and procurement infrastructure are built around commercial and utility work. If you have a smaller commercial system and aren't sure if we're the right fit, the best path is a brief conversation about the project scope.
How do you handle solar repairs in remote or hard-to-access locations?
This is genuinely one of our differentiators. Many of the commercial and agricultural solar systems we work on are in rural locations — which is, in part, where our name comes from. We're accustomed to sites that require significant drive time, that lack nearby lodging and supply infrastructure, and that have limited or no cell coverage for monitoring coordination. We plan logistics accordingly: pre-staging equipment and materials before mobilization, building in additional supply margin for remote sites, and coordinating with local electrical and safety authorities in advance. We don't rely on being able to make a quick parts run or get same-day support from a local distributor when we're three hours from the nearest city.
Industry & Technical Knowledge
What are the most common causes of underperformance in commercial solar systems over 5 years old?
After five years of operation, the most common underperformance drivers we see in the field are: light-induced degradation (LID) and light and elevated temperature-induced degradation (LETID) that have exceeded the module manufacturer's warranted degradation curve; inverter efficiency losses from aging capacitors and fans; soiling accumulation that hasn't been adequately addressed by maintenance programs; shading from vegetation growth that wasn't present at system design; and undiagnosed cell-level damage from hail events that occurred without triggering a formal damage assessment. Many older systems also have monitoring systems with insufficient granularity to catch string-level losses before they have compounded over months or years.
What solar panel manufacturers have known serial defects or warranty issues that affect repowering decisions?
The solar industry has seen a number of significant serial defect issues over the past two decades that affect repowering decisions for system owners. Some widely documented examples include PID (potential induced degradation) susceptibility in certain module lines from multiple manufacturers, back sheet delamination and cracking in specific product generations, and premature yellowing and encapsulant browning in panels produced during certain manufacturing periods. Several manufacturers have also undergone bankruptcy or restructuring that has effectively voided warranty coverage. We stay current on active and resolved serial defect claims, and when we're engaged for a repower or assessment, we specifically evaluate whether known serial defect patterns are contributing to performance issues — as this affects both the repair strategy and the potential for warranty recovery.
How does degradation rate affect when a commercial solar system should be repowered versus maintained?
Standard module warranty degradation rates are typically 0.5% to 0.7% per year after the first year. If a system's actual degradation is tracking within that range, ongoing maintenance is almost always the right economic choice until the system approaches end of warranty life. The calculus shifts when actual degradation has exceeded warranted rates — particularly if it's tied to a serial defect or cumulative weather damage — because continuing to maintain a system that will keep declining faster than expected delays the recovery of production capacity. We help clients model this decision by estimating actual versus expected production over the remaining lease or ownership term, factoring in repower cost, expected production improvement, and current incentive environments.
What's the difference between an O&M provider and a solar restoration contractor, and when do you need each?
An O&M (operations and maintenance) provider handles the ongoing, routine work of keeping a solar system operating: scheduled inspections, inverter resets, vegetation management, cleaning, and monitoring response. They're built for frequency and consistency. A special projects coordinator like Rural Solar Restoration is built for scope and complexity — major component replacement, severe weather remediation, system repowering, decommissioning, and specialized assessments that go beyond routine maintenance capability. Most commercial solar assets benefit from both: a quality O&M provider as the ongoing operational foundation, and a restoration partner who can handle the projects that fall outside the O&M scope. We work alongside O&M providers regularly and see the relationship as complementary rather than competitive.