Category: Renewable energy insurance · Reviewed by Jake Leat, Associate Director · Last reviewed 2026-06-10
Renewable energy operational risks is the term used by UK insurers, brokers and lenders for the portfolio of property, machinery breakdown, business interruption, liability and emerging environmental exposures faced by renewable energy generation assets once commissioning is complete.
Category: Renewable energy insurance Also known as: Renewables operational risk, Renewable energy OAR risks, Renewable energy hazards Typical UK market form: OAR + BI + Public/Products Liability + EIL + Cyber + D&O Related concepts: Wind farm insurance, Solar farm insurance, Battery storage insurance
Renewable energy operational risks describes the cross-cutting exposures faced by wind, solar, hydroelectric, tidal, geothermal, hydrogen and battery storage assets during their economic operating life. The phrase is used in UK insurance practice both as a generic risk register heading and as a specific reference to the perils covered under an Operational All Risks (OAR) policy as distinct from the Construction All Risks (CAR) programme placed during build.
The category bridges traditional power generation underwriting concepts — property damage, machinery breakdown, business interruption — with technology-specific exposures (thermal runaway in BESS, blade-tip lightning in wind, cable damage in offshore wind, induced seismicity in geothermal) and with wider commercial exposures including cyber, supply chain failure, performance degradation and regulatory or revenue stack risk.
The operational programme for a UK renewable energy asset is normally written as an Operational All Risks (OAR) policy combining property damage and machinery breakdown perils, with business interruption following loss of revenue or gross profit. The OAR section is usually written on a “physical loss or damage” basis with technology-specific endorsements addressing the principal perils (serial defect, machinery breakdown, transit, cable damage where relevant).
A typical operational placement is supplemented by a stand-alone Public and Products Liability tower addressing third-party bodily injury and property damage, Environmental Impairment Liability (EIL) addressing pollution and contamination exposures (transformer oil release being a particular concern), Directors’ and Officers’ Liability (D&O) covering management liability of the project company, and Cyber Insurance addressing operational technology cyber exposures including SCADA and BMS systems. Performance warranty and availability warranty cover, where transferable, may be placed with specialist underwriters. Terrorism cover is normally placed separately or written into the main property policy.
Property damage and machinery breakdown drivers vary substantially by technology. Onshore wind is dominated by gearbox failure, generator bearing failure, blade leading-edge erosion and blade lightning damage. Offshore wind adds cable damage (the largest single claims driver for the UK operational fleet) and foundation grouted connection issues for the early generations of monopiles. Solar PV is dominated by inverter and DC string fires, theft and module degradation. BESS is dominated by thermal runaway and electrical fault. Hydroelectric is dominated by powerhouse flooding, turbine runner damage and transformer failure. Tidal stream is dominated by marine recovery costs after subsea component failure. Geothermal is dominated by scaling, corrosion and pump failure.
Common exposures across the portfolio include lightning, hail, flood, fire, windstorm and machinery breakdown of common balance-of-plant components (transformers, switchgear, control systems). Business interruption exposure is heavily dependent on the revenue stack: CfD-supported assets carry a more stable but capped exposure profile; merchant assets carry materially more volatile BI exposure; hybrid revenue stacks (e.g. solar plus battery storage with capacity market participation) introduce complex aggregation and indemnity period considerations. Cyber attacks on SCADA, BMS and remote operations infrastructure are a growing exposure that has driven the separation of cyber cover from the main property policy.
Operational renewable energy assets in the UK operate within a regulatory envelope set by Ofgem (generation licence, network charging, balancing mechanism participation), the relevant environment regulator (Environment Agency, SEPA, Natural Resources Wales, DAERA), the Health and Safety Executive (workplace safety, COMAH for major accident hazards including hydrogen) and the Marine Management Organisation or its devolved equivalents (for offshore assets). The Energy Act 2023 introduced significant changes including the LDES cap-and-floor regime for long-duration storage, hydrogen production licensing, and amendments to NSIP thresholds.
Revenue support is provided through the Contracts for Difference scheme administered by the Low Carbon Contracts Company (LCCC) under the Energy Act 2013. AR4 (July 2022), AR5 (September 2023) and AR6 (September 2024) have progressively shaped the operational fleet composition and revenue profile. Legacy support continues under the Renewables Obligation (closed to new accreditation in 2017) and Feed-in Tariff (closed to new accreditation in 2019). The Climate Change Act 2008 (as amended) sets the legally binding 2050 net zero target that frames overall policy direction.
Capacity for UK operational renewable energy is concentrated in a panel of specialist energy and engineering underwriters in London and continental Europe. GCube Insurance (Tokio Marine HCC) is the longest established dedicated renewables underwriter; Munich Re, Swiss Re Corporate Solutions, HDI Global, Allianz Global Corporate & Specialty, Liberty Specialty Markets, Tokio Marine Kiln, Markel and a range of Lloyd’s syndicates provide additional capacity. The London market remains the primary venue for the largest and most complex placements, particularly offshore wind and stand-alone BESS.
Broker placement is concentrated among Marsh, Aon, WTW, Lockton, Gallagher, McGill & Partners and Howden, with regional brokers active in smaller community-scale schemes. Underwriting and survey practice is increasingly informed by industry working groups including the IMIA (International Association of Engineering Insurers) renewable energy working group and by the loss research published by GCube and the major reinsurers.
A diversified UK renewable energy portfolio comprising a 250 MW offshore wind farm, a 70 MW onshore wind farm, a 49 MW solar farm and a co-located 50 MW / 100 MWh BESS facility would typically be insured under a portfolio operational programme combining an OAR property and machinery breakdown section, a portfolio business interruption section sized to a 12 to 24 month indemnity period, a public liability tower of £100–£250 million, EIL cover, D&O cover at holding company level and a stand-alone cyber tower of £25–£50 million.
This entry is part of the Apex Insurance Wiki. Last reviewed by Matt Bartlett on 2026-06-10. Next review: 2026-12-10.
Apex Insurance Brokers Limited. Authorised and regulated by the Financial Conduct Authority, FRN 724952. Registered in England and Wales, Companies House 07014570. This entry provides general information about UK insurance concepts and is not regulated advice. Consult your insurance broker on your specific position.
Apex Insurance Brokers serves UK professional services firms and commercial businesses. Call 0117 325 0027, email hello@apexinsurancebrokers.co.uk, or request a quotation.
Get a quote