Why solar PV installations alter the way insurers assess risk
A growing number of businesses now rely on solar energy production to support key equipment, manage energy costs or generate income. This creates a level of dependency that insurers must factor into their assessment. When a business instals solar panels, the system affects both the structure and the way the business relies on it.
A solar PV (photovoltaic) installation adds DC cabling, inverters, isolators and sometimes battery storage. These elements change the electrical risk profile of a property. Insurers focus on the potential for overheating, arcing and faults, especially where cabling runs through the building or where batteries are placed in tight or poorly ventilated areas. They want assurance that the design and installation reduce the likelihood of electrical failure.
Additionally, if the system fails, the business may face higher costs or a loss of revenue, so insurers consider the potential for business interruption as well as the cost of repairing or replacing the equipment.
Why this matters for installers
Installers who understand how insurers approach solar projects are better placed to prevent issues that can lead to gaps in cover. By anticipating the questions insurers are likely to ask, they can provide appropriate documentation, highlight relevant risks, and design installations that withstand closer examination. This supports the client, strengthens confidence in the work, and reduces the likelihood of disputes if a claim arises.
Because commercial systems involve a broader set of considerations than domestic rooftops, insurers view each installation within the wider business environment, looking beyond the building itself.
How insurers assess structural suitability in commercial properties
Structural suitability is often one of the first areas insurers examine. They typically expect evidence that load assessments have been completed, confirmation that the mounting approach is appropriate for the roof, and assurance that any penetrations are properly sealed to prevent water ingress. These details help insurers judge whether the system affects the long‑term integrity of the building and whether additional safeguards are required.
Electrical and fire safety checks – the must-knows
Electrical design merits close attention from insurers because losses often stem from this part of the installation. As a result, insurers look for clear evidence that safety has been prioritised in the design process. They typically assess how the system has been configured and whether recognised good practice has been followed.
Insurers may check that:
- Internal DC cabling is kept to a minimum
- Isolators are correctly rated and positioned for safe access
- Inverters and batteries sit in appropriate, ventilated locations
- Thermal risks have been considered and reduced
- Components meet recognised standards.
Note: clear documentation and installation photos make these points easier to verify.
Operational and financial exposure – the key considerations
Many commercial systems support revenue generation or essential daily operations, and insurers want a clear view of the financial impact if the system fails. They often start by looking at generation data to understand expected output, then review export tariff information to see what income might be lost during a shutdown. They also examine how reliant the business is on the installation. Some organisations depend on consistent solar PV output, while others use it mainly to offset costs. Insurers usually request contingency plans as well, since these show how the business would manage a temporary loss of power.
Together, these details help them judge the scale of any potential interruption.
Security and theft vulnerabilities to consider
Large solar panel arrays can be vulnerable to theft, particularly in rural or open locations where equipment is more exposed. Insurers often check how well the site is protected and whether basic security measures are already in place.
They may look for:
- Perimeter security
- CCTV coverage
- Anti‑theft fixings
- Controlled access to equipment.
Installers who plan for these risks from the outset can help clients obtain more favourable insurance terms.
Why ground mounted systems face different risks
Ground mounted commercial arrays sit outside the building envelope, which changes how insurers classify them. They are more vulnerable to theft, vehicle impact, storm damage and vandalism. As a result, insurers may require a separate renewable energy policy, stronger security measures, regular vegetation management and evidence that the mounting structure is robust.
Thermal and fire risks in battery systems
Battery systems attract the highest level of scrutiny, largely because they introduce risks that are more complex than those associated with standard PV equipment. Insurers pay close attention to how the system manages heat, since thermal runaway remains one of the most significant sources of battery‑related incidents. They also look at ventilation, both to control temperature and to ensure that any fault gases can dissipate safely. Fire separation is another point of focus, as insurers want to see that the battery installation is positioned and enclosed in a way that limits the spread of fire and allows emergency services access without unnecessary obstruction.
Beyond location and layout, insurers also review manufacturer certification and system integration. They look for evidence that the batteries, management systems and inverters meet recognised standards and that the installation follows the manufacturer’s guidance. They will also check how the batteries interface with the wider system, including charge control and protection measures.
Note: installation records, commissioning reports and photographs help insurers confirm that the system meets industry expectations and reduce the risk of exclusions or higher premiums.
Measures installers can take to improve insurability
Installers can make a noticeable difference to the insurance outcome by:
- Providing a complete handover pack with certificates, datasheets, schematics structural assessments and maintenance guidance
- Recording installation quality with photographs
- Encouraging clients to notify their insurer before work begins
- Explaining the difference between insurance and warranties
- Designing with risk in mind, paying attention to cable management, fire load, secure mounting and appropriate equipment placement.
Managing risk to improve insurability for commercial sites
Similarly, commercial property owners can support a smoother insurance process by taking the following pragmatic steps:
- Maintain current building records. Keep structural reports, roof surveys and maintenance logs accessible
- Inform insurers early. Share project details before work starts and confirm any required documentation
- Request a complete handover pack. Include certificates, datasheets, schematics and structural assessments
- Keep installation photos. Retain clear images of key stages to show installation quality
- Understand warranties versus insurance. Know what is covered and where your responsibilities sit
- Manage site risks proactively. Maintain access routes, vegetation and security measures, and keep to planned maintenance
- Hold clear emergency procedures. Ensure staff know how to isolate the system and manage temporary loss of output.
The insurance impact
As we’ve learnt, commercial solar PV panels influence far more than energy costs. Once installed, they prompt insurers to move from a straightforward assessment of the building to a broader review of design quality, electrical and fire safety, battery storage arrangements, security measures and operational dependencies. As the earlier sections highlighted, each of these factors shapes how insurers judge risk and determine the scope of cover. For installers and commercial property owners, engaging with these considerations from the outset remains the most effective way to strengthen insurability and secure more favourable terms.
Contact us
For further guidance on improving the insurability of a planned commercial solar project, or to discuss specific insurer requirements, call: 01483 948840 or email: horsham@thecleargroup.com
