ALP20 Lightning Protection: Field Results Confirm Laboratory Predictions
A laboratory lightning strike attaches to an ALP20-coated blade tip during high-voltage testing at Element Lightning Technologies in Pittsfield, MA.
Controlled high-voltage testing predicted a large reduction in blade lightning damage. Independent field data now supports that prediction.
Arctura presented new results for the ALP20 lightning protection coating at ICOLSE 2026, the International Conference on Lightning and Static Electricity, held in October in Charleston, SC. The peer-reviewed paper, co-authored with lightning specialist Andy Plumer and Arctura’s engineering team, traces a line from laboratory prediction to field confirmation.
Laboratory testing: quantifying the mechanism
ALP20’s protective effect was first established in a high-voltage laboratory program conducted to the IEC 61400-24 standard, years before any field data was available. Compared with uncoated reference samples, ALP20 reduced the per-strike puncture rate by 68% (p=0.006), a statistically significant result. The effect was strongest at the steeper blade angles that matter most: across 66 strikes at angles of 30 degrees and greater, coated samples recorded zero punctures (p=0.015).
Combining these laboratory results with the NEDO field study of lightning attachment angles, which characterizes how strikes actually distribute across an operating blade, the team predicted a 73% reduction in blade punctures once ALP20 is deployed in the field.
Field trial: confirming the prediction
That prediction has now been tested against real-world data. An independent trial covering 123 turbines included 15 ALP20-coated turbines, which absorbed 35 recorded lightning flashes over the monitoring period. Post-strike inspections found zero confirmed new blade damage on the coated turbines. These are observations from operating turbines, not projections, and they support the reduction predicted from the laboratory and attachment-angle analysis. They are also consistent with ALP20 field deployments since 2022, which have reported no lightning damage to date.
(Under a data-sharing agreement with the operator, the name and location of the wind farm are not disclosed.)
Why it matters
Lightning is one of the largest sources of unplanned blade repair and downtime in the wind industry, and the cost falls on owners, operators, and the insurers who cover them. ALP20 offers a coating-based approach that works with existing blade designs rather than requiring new hardware. A protection claim that begins with controlled laboratory testing and is then supported by independent field data gives asset owners and underwriters a sound basis for evaluating it.
ALP20 is manufactured and sold by Mankiewicz, a global leader in high-performance coatings, and is powered by Arctura’s patented ArcGuide® technology. To learn more about ALP20 or to discuss your fleet, please contact us.
