Coverage and quotation in brief
Energy insurance is structured around property damage, machinery breakdown and associated business interruption risks during a facility's construction and operational phases. Neolife gathers quotations based on technology type, facility value, loss scenarios and financing conditions. For solar, wind, hydro and BESS projects, coverage scope, deductibles and business interruption periods are each assessed individually.
Insurance lifecycle of an energy project
An energy project's insurance requirements begin at the construction phase and continue throughout the facility's economic life. Each phase carries its own specific risks and different insurance products; structuring these in a coordinated manner prevents coverage gaps.
Construction All Risks (CAR) / Erection All Risks (EAR) + Delay in Start-Up (DSU/ALOP)
- Equipment transit (Marine Cargo)
- Erection / installation damage
- Testing and Commissioning Period
- Delay in Start-Up (DSU)
- Third Party Liability during construction
Operational Property Damage (OPD) + Machinery Breakdown (MB) + TPL
- Operational damage (OPD)
- Machinery Breakdown (MB)
- Business interruption — waiting period
- Latent defect during maintenance period
- Operational liability (TPL)
Business Interruption (BI) + Machinery Loss of Profits (MLOP) + Renewal
- Ongoing OPD and MB
- Loss of profits / Business interruption (MLOP)
- Natural catastrophe sublimits
- Equipment ageing / revaluation
- Cyber / environmental liability
Key coverage categories
Operational Property Damage (OPD)
Physical damage from sudden external events: fire, explosion, storm, earthquake (sublimit), flood, lightning, external impact. Wear and tear, corrosion and gradual deterioration are excluded.
Machinery Breakdown (MB)
Failures originating internally within the machine: material fatigue, overcurrent, short circuit, operator error, lubrication failure. Coverage boundaries overlap with OPD; coordinated drafting of both policies is critical.
Business Interruption / Machinery Loss of Profits (BI/MLOP)
Revenue loss and continuing fixed costs during the period a facility is unable to produce, following an OPD or MB loss. Selection of the Indemnity Period and waiting period is determined by the project's cash-flow requirements.
Third Party Liability (TPL)
Third-party bodily injury and property damage arising from facility operations. Environmental pollution liability is generally assessed separately unless expressly included.
DSU / ALOP
Revenue loss arising from a delay to the planned start-up date due to an insured loss during construction. Contingent on a physical loss under CAR/EAR; cannot be triggered independently.
Marine Cargo / Transit
Damage during transit of major equipment (turbines, transformers, panel arrays) from factory to site. A separate marine policy is critical for large, long-haul shipments.
Cyber Risk
Cyber attacks on SCADA/OT systems, data breaches and operational system outages at energy facilities. Cyber-induced physical damage exclusions in OPD/MB policies are increasingly common; a standalone cyber policy should be considered.
Environmental Liability
Soil, water and air pollution from facility operations, together with associated clean-up costs and liability. Generally excluded from standard TPL policies; a specialist environmental liability policy is required.
Property Damage vs Machinery Breakdown: the critical boundary
One of the most frequently asked questions in energy facilities is: "Does this loss fall under the OPD policy or the MB policy?" The boundary is sometimes clear, sometimes disputed.
OPD
- External cause — sudden, unexpected event
- Fire — regardless of cause
- Storm, flood, earthquake
- Direct lightning strike damage
- Impact, foreign object strike
- Propagation of damage from neighbouring equipment
- Sabotage / vandalism
MB
- Internal mechanical or electrical failure
- Short circuit, arc, overvoltage
- Material fatigue, crack formation
- Lubrication failure, seal loss
- Operator error (internal cause)
- Pump, turbine, gearbox internal failure
- Compressor, generator internal failure
Transformer, turbine and large generator: special considerations
Power transformers, wind turbines and large generators are the most expensive and longest lead-time equipment in energy facilities. Specific risks for this equipment include:
- Power transformer: Arc failure, winding degradation, short circuit, oil fire. Replacement lead times for large grid transformers can be 12–36 months; the BI indemnity period must be set accordingly.
- Wind turbine nacelle / gearbox: Gearbox failure is the most common MB loss item. Offshore access difficulty extends repair time and increases BI loss.
- Solar PV inverters: Serial Loss risk — mass failure of thousands of the same inverter model. Brand/model concentration is specifically questioned during underwriting.
- Hydropower turbine and injectors: Cavitation damage — arising from high-speed flow, debated as to whether it constitutes wear; explicit definition in policy wording is required.
PML and EML: loss estimation and capacity determination
Probable Maximum Loss (PML) and Estimated Maximum Loss (EML) are the primary tools used by underwriters to determine insurance capacity and limits. Reinsurance structuring is also designed around these values.
PML / EML Concepts
Probable Maximum Loss
A large-loss estimate calculated under defined hazard, event and protection assumptions. The scenario and methodology used must be clearly stated in the risk engineering report.
Estimated Maximum Loss
A large-loss estimate calculated under defined operational and protection assumptions. EML does not in every report mean total loss or a figure above PML; comparisons must be made using the same methodology.
Natural Catastrophe PML
PML for catastrophic events such as earthquake and flood is assessed separately from single-risk PML. Cumulative PML is calculated for natural catastrophe scenarios affecting multiple facilities.
Capacity & Limit Determination
Limit and sum insured are determined by assessing reinstatement value, loss scenarios, contractual conditions and purchased layers together. PML/EML alone is not a universal minimum limit rule.
Project finance and PML: A lender or financier may require in the credit agreement that the insurance limit equals at least the facility's Replacement Value or EML. If this condition is not met during policy negotiation, creditors may demand additional security.
Business Interruption (BI/MLOP) Coverage
Physical damage indemnity covers repair costs; however, the revenue loss during the period the facility is unable to operate is a separate problem. BI/MLOP closes this gap.
OPD or MB Loss
For BI/MLOP to respond, a physical loss indemnifiable under the OPD or MB policy must first occur, resulting in a production outage.
Waiting Period
No BI indemnity is paid for the first X days/hours the facility remains disrupted. A shorter waiting period increases the premium. Typical range in energy facilities is 24–72 hours.
Indemnity Period
The maximum period for which BI will continue to respond after the waiting period. Major equipment procurement lead times (particularly transformers/turbines: 12–36 months) should determine this period.
MLOP calculation items
- Lost revenue: Calculation of electricity that cannot be generated at market or guaranteed price.
- Continuing fixed costs: Personnel, financing interest, insurance and maintenance costs that continue even when the facility is idle.
- Savings: Variable costs not incurred while the facility is shut down are deducted from the MLOP claim.
- Auxiliary generation sources: Where available, the effect of activating standby capacity.
Grid outage: additional coverage check
It should not be assumed that a grid-sourced outage is automatically covered under a standard business interruption policy. The damage trigger, service provider extension, waiting period and sub-limits are each negotiable separately. The energy buyer's payment risk is assessed separately from business interruption cover, through trade credit insurance or guarantee options.
Inadequate indemnity period: In Türkiye, procurement lead time for a large power transformer can be 18–36 months. If the BI indemnity period is set at 12 months and the loss results in 18 months of outage, the revenue loss from the final 6 months falls outside the indemnity. This gap is also unacceptable to lenders.
Renewable energy segments: sector-specific risks
Solar PV Insurance
- Panel damage: hail, storm, fire, theft
- Inverter failure — MB coverage
- Tracker system damage and failure
- Cabling damage, DC/AC conversion
- Serial Loss risk — same model inverter/panel
- Transformer breakdown and fire
- Foreign object shadowing — not physical damage
- Soiling / degradation excluded
Wind Farm Insurance
- Blade damage: storm, icing, fatigue, lightning
- Nacelle fire — largest loss scenario
- Gearbox failure — most common MB item
- Tower structural damage
- Lightning protection deficiency
- Access difficulty — extended repair time, larger BI
- Offshore turbine marine corrosion
- Wind intensity not covered — physical damage only
Hydropower Insurance
- Turbine and injector damage
- Cavitation damage — wear boundary disputed
- Penstock and pipeline damage
- Dam and gate mechanism
- Flood-induced siltation
- Transmission connection outage
- Water flow risk — assessed separately from property damage
- Environmental liability — separate assessment
Thermal / Natural Gas
- Boiler and turbine damage — high loss potential
- Gas turbine hot section failure
- Generator winding and rotor damage
- Heat recovery boiler and pipework
- Compressor failure
- HRSG tube damage
- Fuel interruption does not trigger BI (external cause)
- Environmental/pollution liability — separate
BESS: Battery Energy Storage Insurance
Battery Energy Storage Systems (BESS) are one of the fastest-growing and most carefully scrutinised segments in energy insurance. Their risk profile is unique, intersecting OPD, MB and cyber risk simultaneously.
Critical Risks in BESS Insurance
Thermal Runaway, Fire Propagation, OEM Warranty vs insurance coverage distinction
🔥 Thermal Runaway
Overheating in a battery cell propagates to surrounding cells, triggering a chain reaction. Damage can escalate from cell to module to cabinet. Well-designed thermal management and fire suppression systems limit propagation — underwriters scrutinise these systems in detail.
🔥 Fire Propagation
Inter-cabinet fire spread — the difference between single-cabinet and multi-cabinet loss directly determines the indemnity amount and PML calculation. Physical separation between cabinets, fire barriers and suppression system design are the key factors limiting this risk.
⚡ Power Conversion System (PCS)
PCS and BMS (Battery Management System) failures may be assessed under both OPD and MB. The boundary between software-induced BMS errors and hardware failures must be clearly defined in policy wording.
📉 Battery Capacity Loss / Performance Degradation
Capacity loss attributable to service life falls under wear and tear and is excluded from insurance. Performance falling below the expected capacity degradation curve is also not an insurable loss — this is an OEM Warranty matter.
Distinction Between OEM Warranty and Insurance Coverage
The BESS manufacturer (OEM) provides a warranty for manufacturing defects and performance degradation over a defined period and under defined conditions. Insurance covers sudden physical damage. These two protections are not interchangeable; however comprehensive the warranty, it does not alter the role of insurance in the event of fire or mechanical failure. The converse also holds: insurance does not cover the OEM's failure to honour its warranty obligations.
Natural catastrophe sublimits, serial loss and design defects
Natural catastrophe sublimits
Energy facilities are generally located in open geographies remote from urban areas, which increases natural catastrophe exposure. Separate sublimits apply in OPD policies for earthquake, flood, storm and landslide.
| Risk | Typical Treatment | Notes |
|---|---|---|
| Earthquake | Separate sublimit / high deductible | High seismic risk across Türkiye; varies by region |
| Flood / inundation | Separate sublimit | Critical for solar PV / hydropower in valley locations |
| Storm / tornado | Included in general coverage | High deductible may apply for wind and solar panels |
| Hail | Sublimit / coinsurance | Most common minor loss for solar PV panels |
| Landslide | Subject to assessment | Geotechnical report is the underwriter's primary document |
Serial Loss risk
In large solar and wind projects using thousands of the same manufacturer and model, a serial manufacturing defect causing a mass failure affects the entire facility. Underwriters:
- Specifically query the brand and model of inverters, panels or turbines used.
- May apply a sublimit or a specific exclusion for Serial Loss in the policy.
- Diversification across different brands/models may be considered a risk mitigation measure.
Defective Design: at the operational phase
A design defect discovered after the facility is commissioned is treated differently under operational policies compared to CAR/EAR. Standard OPD/MB policies do not cover the design defect itself, but cover the physical damage arising from that defect. How the "defective design" exclusion is formulated in policy wording determines the indemnity amount in major losses.
Transmission & Distribution (T&D) risks
Transmission lines, distribution networks and substations are the components of the energy system that generate the widest BI loss when damaged.
- Overhead line (OHL) damage: Storm, icing, tree fall, short circuit. With long line lengths it is difficult to localise the damage; PML is generally calculated over a defined span interval.
- Underground cable: Mechanical damage, ground settlement, water ingress. Fault location and repair time can be longer than for OHL.
- Substation (GIS/AIS): SF6 gas leakage, busbar short circuit, arc flash fire. Major substation damage means high PML and long lead times.
- SCADA / digital control system: Loss of control from cyber attack or software error. Boundaries between OPD/MB and cyber policies must be clarified.
Insurability boundary for grid outage: BI loss at a facility caused by an outage originating in the grid operator's own system is outside standard policy coverage. Some specialist market structures may offer limited cover; however, market access for such products is restricted and may not always be available.
What is required for risk assessment?
The following information and documents should be prepared for an energy insurance quotation to be assessed fully and promptly. This list may also be used in project risk discussions.
Project Technical File
Risk and Loss Management
Financial and Insurance Structure
Geographic and Natural Catastrophe
Additional documents for BESS projects
- Battery chemistry (LFP, NMC, etc.) and cell manufacturer
- Thermal management system technical details
- Fire suppression system design (cabinet-specific / system-wide)
- BMS and PCS technical specification
- Thermal runaway test reports (UL 9540A or equivalent)
- Physical separation between cabinets and barrier structure
Frequently asked questions
Related pages
Methodology in loss estimation
Swiss Re: Exposure rating explains different large-loss estimation assumptions. The definitions in the facility report must be used as the basis for policy and capacity discussions.