How Solar Developers Can Protect Projects From Hail Damage

Hail accounts for just 1.4% of solar insurance claims by count. Yet it drives 54% of insured losses by value.¹ That gap between how often hail strikes and how much damage it causes is one of the most consequential blind spots in solar project risk management today, creating clear advantages for developers who treat resilience as a design priority.

Individual events have generated losses exceeding $50 million, and hail accounts for 55% of all natural catastrophe claims for utility-scale solar photovoltaic (PV) systems in North America.² Average post-event downtime reaches 240 days, nearly twice the 136-day average for mechanical or electrical failures, with cascading effects on revenue and project financing covenants.³ Effective hail mitigation can reduce those losses to under $5 million, but only when solar project risk management is treated as a design requirement from the start.

How can solar developers reduce hail damage?

The most impactful decisions happen before construction begins. Solar farm hail risk is substantially influenced by module and tracker selection, choices that also shape how insurers assess and price a project.

For tracker systems, automated hail stow capability has become a defining feature of high-performing projects across high Severe Convective Storm (SCS) regions, including Texas, Oklahoma, the Great Plains and the Southeast. Trackers that rotate to 60 degrees or steeper at storm onset have demonstrated a 70% reduction in hail losses, particularly when paired with real-time weather forecasting that activates stow 15 to 30 minutes before hail arrival without human intervention. For fixed-tilt systems, panel angles of 60 degrees raise module survival rates from 82% to 99%.⁴ As SCS activity expands, underwriters are increasingly rewarding these capabilities with more competitive terms.

Panels with 3.2mm fully tempered glass provide twice the hail resistance of standard 2mm heat-strengthened glass, and certification for hailstones larger than 25mm is increasingly recognized as a marker of project quality. Documented hail response procedures, regular stow testing and staff training on emergency protocols close the loop on pre-event preparedness. That’s the difference between a well-designed system and one that performs when conditions deteriorate quickly.

How should solar hail risk management be structured?

Engineering controls are only part of the equation. Utility-scale solar risk management requires an integrated approach connecting physical mitigation with insurance structuring, operational protocols and site selection.

Solar energy insurance programs are increasingly differentiated based on risk quality. Carriers actively distinguish between projects with documented hail stow protocols and those without, and that distinction shows up in both pricing and available capacity. In the highest-exposure markets (Midwest and Texas), deductibles have reached $500,000 or higher, and even well-mitigated projects may still carry sub-limits tied to SCS exposures. For those markets, parametric hail insurance offers an additional layer of protection, triggering payouts based on storm characteristics rather than assessed damage and accelerating recovery timelines.

Sizing business interruption coverage to reflect the 240-day average post-hail downtime, nearly twice what mechanical or electrical failures require, is another gap worth closing in many solar insurance programs.

Post-event inspection protocols are equally important. Aerial drone inspections immediately after a storm, followed by thermal infrared imaging and electroluminescence testing within 30 days, can identify hidden microcracks that erode module performance well before they appear in production data.

Site selection rounds out the program. Hail risk assessment using National Oceanic and Atmospheric Administration (NOAA) Storm Prediction Center data, combined with analysis of historical hail frequency and stone size, helps developers identify exposure before financial close. Sites with a history of hailstones 2 inches or larger warrant particular scrutiny.

Achieving this requires upfront investment in tempered glass modules, advanced tracker systems, weather forecasting services and adequate insurance, but that investment pays measurable returns in reduced losses, better coverage terms and stronger project economics.

Solar developers who build hail damage prevention into every phase create assets that are better protected, more financeable and more competitive in a market where insurers are paying close attention.

Connect with HUB International’s Renewable Energy and Sustainability Practice experts to start the conversation about solar farm insurance coverage and risk management strategies for your portfolio.

¹ pv magazine, “Hail damage to solar projects: 1% of filed claims, but over 50% of total losses,” September 19, 2025.
² Solar Power World, “GCube report says hail damage now accounts for 54% of solar loss claims,” December 6, 2023.
³ Insurance Business, “Hail causes more than half of solar panel weather claims, report reveals,” July 10, 2025.
⁴ U.S. Department of Energy, “Hail Damage Mitigation for PV Systems,” accessed June 24, 2026.