How Long Does an EL Inspection Take? Estimating the Timeline for a PV Plant Campaign

ⓘ This article is currently published in Chinese. An English version is being prepared — read the Chinese original.

Asking how long an EL inspection takes is like asking how long a construction project takes: the honest answer is a framework, not a number. This article breaks the timeline of a plant-scale EL campaign into four phases — preparation and access coordination, on-site imaging, image review and defect grading, and reporting — and explains which variables stretch or compress each phase. The biggest lever is the imaging window itself: traditional EL requires darkness, so a campaign is rationed by usable night hours, while daytime-capable equipment and drone-mounted imaging change the arithmetic entirely. The article also covers what owners can prepare in advance to cut days off the schedule, when a sampling plan is a better use of time than a full sweep, and closes with an FAQ on scheduling around grid outages, weather delays, and report turnaround.