Rooftop Solar Installations on Commercial Property: Insurance in India

India crossed 11 GW of cumulative rooftop solar capacity by the end of 2025, making it one of the fastest-growing distributed solar markets in Asia. Commercial and industrial (C&I) customers account for approximately 60% of this capacity — factories, warehouses, hotels, hospitals, and large retail complexes have installed systems ranging from 50 kW to 10 MW on their rooftops and carports.

The growth has been driven by falling panel prices (crystalline silicon modules now cost below INR 20 per watt peak at retail), accelerating commercial electricity tariffs in states like Maharashtra, Tamil Nadu, and Karnataka, and the PM Surya Ghar Muft Bijli Yojana for residential installations that has increased overall installer capacity and supply chain depth.

Yet insurance awareness has not kept pace with installation growth. A significant proportion of C&I rooftop systems are either uninsured or assumed to be covered under the building's existing fire policy — an assumption that is frequently wrong and can leave property owners facing uninsured losses from hail damage, inverter fires, or cable faults that extend into the building fabric.

Panel Damage from Hail and Wind

Photovoltaic panels are tested to withstand hailstones up to 25 mm diameter at 83 km/h under IEC 61215 standards, but severe hailstorms in states like Rajasthan, Haryana, and parts of Maharashtra can exceed these parameters. A hailstorm event can crack tempered glass across dozens or hundreds of panels simultaneously. Wind uplift damage — panels being torn from mounting structures during cyclonic events — is the other major weather risk, particularly for coastal installations in Andhra Pradesh, Odisha, and Tamil Nadu.

Inverter Failure and Fire

Inverters convert DC power from panels to AC power for building use or grid export. They are the component most likely to fail and can generate significant heat in the event of internal fault. An inverter fire that spreads to the building fabric — through cable trays, penetrations in the roof membrane, or adjacent combustible material — can cause property damage far exceeding the value of the solar system itself. In India, several such events have been reported in industrial sheds where inverters were not installed in fire-rated enclosures.

Cable Faults and DC Arc Events

DC cabling runs from panels on the roof to the inverter room below. DC arcs are more dangerous than AC arcs because DC current does not have a natural zero-crossing to extinguish the arc. A poorly installed or deteriorated DC cable can generate an arc fault that sustains itself and ignites surrounding material. Central Electricity Authority (CEA) regulations require arc fault circuit interrupters (AFCIs) and rapid shutdown devices on systems above certain capacities, but compliance in older installations is uneven.

Theft of Panels

Panel theft is a meaningful risk for commercial rooftop systems in India, particularly in locations with poor overnight security or remote industrial areas. A 500 kW system may have 1,200–1,500 panels; theft of even 10% of panels can disrupt generation significantly and the replacement cost at current prices runs to several lakhs. Standard all-risk solar policies cover theft, while a fire-only endorsement on the building policy does not.

Revenue Loss from Generation Downtime

For C&I owners who have invested in solar to reduce electricity bills, any downtime translates directly into higher DISCOM tariff costs. For facilities that have signed a Power Purchase Agreement (PPA) with a third-party aggregator or RESCO, downtime may trigger contractual penalties. Loss of generation revenue can be covered under a business interruption or machinery loss of profits extension on the solar all-risk policy.

Structural Loading Risk on the Building

A well-designed rooftop solar installation typically adds 15–20 kg per square metre of dead load to the roof structure. If the building's structural capacity was not evaluated before installation — a common shortcut in older industrial sheds — the additional load can cause deflection or, over time, structural distress. This risk sits at the intersection of engineering liability (the installer or structural engineer) and property insurance (the building owner). Insurers will ask for a structural adequacy certificate when underwriting buildings with large rooftop systems.

This is the most common and most consequential question in rooftop solar insurance in India. The answer depends on how the fire policy is written.

A standard SFSP (Standard Fire and Special Perils) policy covers items that are declared in the schedule and for which a sum insured is specified. If the rooftop solar system was installed after the fire policy was taken out and was never added to the schedule, it is almost certainly not covered. Even if the building sum insured was increased at renewal, the increase may have been intended to reflect construction inflation rather than the new solar asset.

Some policies include blanket coverage for plant and machinery installed on the premises, but even where such wording exists, insurers often dispute whether solar panels constitute 'machinery' or 'plant' in the traditional sense. The most reliable approach is to add the solar system as a specifically declared item in the fire policy schedule — with its own sum insured equal to the system's replacement cost, including installation.

The fire policy, even if the solar system is declared, covers only fire and named perils. It will not cover:

• Mechanical or electrical breakdown of the inverter (this requires machinery breakdown coverage).
• Hail or panel damage not rising to the level of a 'storm' event as defined in the policy.
• Theft of panels.
• Loss of generation revenue.

For full protection, a standalone solar all-risk policy or a specifically underwritten solar endorsement to the fire policy is preferable to relying on an unamended SFSP.

MNRE (Ministry of New and Renewable Energy) sets technical standards for grid-connected rooftop solar systems through the Grid-Interactive Rooftop Solar PV Systems — Technical Standards framework. Key requirements include the use of BIS-certified components, compliant grid interface protection, and anti-islanding functionality on inverters.

CEA (Central Electricity Authority) regulations under the CEA (Technical Standards for Connectivity of the Distributed Generation Resources) Regulations and the CEA (Measures Relating to Safety and Electricity Supply) Regulations govern the safety of grid-connected installations, including requirements for earthing, DC cabling, and protection devices.

For insurers, MNRE and CEA compliance is not simply a box-ticking exercise. A system installed without compliant components is more likely to experience cable faults, inverter failures, and arc events. Most solar all-risk policies in India include a warranty that the system has been installed in accordance with MNRE technical standards and that applicable CEA regulations have been followed. Non-compliance can give an insurer grounds to deny a claim, and in the event of a fire that spreads to the building, the absence of required safety devices will be scrutinised closely.

Insured parties should retain copies of the DISCOM interconnection agreement, the CEA-compliant single-line diagram prepared by a licensed electrical contractor, and the commissioning report from the EPC contractor. These documents form the basis of compliance evidence in any post-loss investigation.

There are two dominant commercial structures for rooftop solar in India, and they have very different insurance implications.

Owner-Installed (CAPEX model): The building owner pays for the system upfront, owns the panels and inverters, and benefits from all generated electricity. In this model, the building owner is responsible for insuring the system. The asset appears on the owner's balance sheet and should be declared in the property and machinery breakdown policies. The owner bears all risks of damage, breakdown, and generation loss.

RESCO (Renewable Energy Service Company) model: A RESCO invests in, owns, and operates the solar system on the building owner's roof. The building owner pays the RESCO for electricity consumed at a contracted per-unit rate (usually below DISCOM tariff), and the RESCO retains ownership of the panels. The RESCO typically handles insurance of the solar asset, and the PPA agreement will specify this obligation.

However, the RESCO model creates a coverage gap that is frequently overlooked: if the RESCO's solar system causes a fire that damages the building owner's structure, the building owner's fire policy will cover the building damage but the subrogation recovery path (against the RESCO) depends on the indemnity and liability clauses in the PPA. Building owners in a RESCO arrangement should ensure:

1. The PPA includes adequate indemnity obligations from the RESCO for damage caused by the solar system.
2. The RESCO holds third-party liability insurance with limits sufficient to cover the building replacement value.
3. The building owner's fire insurer is informed of the RESCO-owned system on the roof.

Failure to inform the building fire insurer of a third-party-owned solar system on the roof can be treated as a material non-disclosure, creating risk of claim denial.

Commercial and industrial rooftop solar systems connected to the grid under net metering or gross metering arrangements export surplus power to the local DISCOM. This creates a liability dimension that is absent from off-grid or captive systems.

If a fault in the solar system causes a power quality event — voltage spike, frequency disturbance, or supply of power to a de-energised section of the grid — the building owner could face claims from the DISCOM or from neighbouring consumers affected by the power quality event. Anti-islanding protection, mandated by CEA regulations, is designed to prevent the most serious such events, but equipment malfunction remains a risk.

Most commercial solar all-risk policies do not automatically include grid liability. This exposure sits more naturally under the public liability policy as a third-party property damage and financial loss liability. C&I owners with systems above 100 kW should specifically discuss grid liability with their insurer and ensure the public liability policy does not exclude electrical equipment-related third-party losses.

Note on net metering disputes: Disputes with DISCOMs over metering accuracy, export credit, and connection permissions are a commercial risk, not an insurance risk. These are resolved through state electricity regulatory commissions (SERCs) and are outside the scope of any insurance product.

A nascent but growing insurance product in the Indian solar market is performance guarantee insurance, sometimes called generation guarantee insurance. This product covers the gap between contracted or modelled energy generation (typically expressed as the P50 or P90 estimate from a pre-installation energy yield assessment) and actual generation over a defined period.

Performance guarantee insurance is most relevant in two situations:

RESCO or PPA arrangements: Where a RESCO has committed to delivering a minimum number of units per month at a fixed rate, underperformance triggers a contractual penalty. Performance guarantee insurance can cover this penalty.

Debt financing of solar assets: Where a bank has financed a solar system and cash flow projections depend on generation assumptions, the lender may require performance guarantee insurance as a loan condition.

In India, this product is underwritten by a small number of specialist insurers and reinsurers, often with a one-to-two year exclusion period for 'bedding-in' variability. The premium is typically 0.5–1.5% of the guaranteed annual generation revenue and is sensitive to the quality of the initial energy yield assessment (irradiance data, shading analysis, and degradation assumptions).

For most C&I rooftop owners who have not entered into a PPA and are simply offsetting their own electricity bill, performance guarantee insurance is not a standard requirement. Business interruption coverage — which pays for the additional electricity cost incurred when the solar system is down due to an insured peril — is a more practical and commonly used product.

Benchmark Premium Ranges (indicative, subject to system survey and location): Solar all-risk (panels, inverters, mounting, cabling): 0.15–0.40% of installed system cost per annum. Systems in cyclone-prone coastal zones (Tamil Nadu, Andhra Pradesh, Odisha) attract rates toward or above the upper end. Systems with certified installers, MNRE-compliant components, and documented commissioning reports attract rates at the lower end.