Start with size and weight
Large-format modules can exceed two metres in length and weigh around 30kg or more. Confirm the number of people or lifting equipment required by the manufacturer and verify roof access before the panels arrive on site.
Check racking and clamp zones
Do not scale a residential racking assumption up to a utility-size panel. Use the module installation manual for approved clamp zones, rail orientation, maximum spans and front/rear static-load ratings.
High current changes inverter selection
Modern bifacial modules can exceed 16A operating current and approach or exceed 18A short-circuit current. Compare module Imp and Isc with the inverter or optimizer input-current limits, including manufacturer-required safety factors and parallel-string rules.
Voc still determines series length
High-current modules can have relatively modest voltage, but maximum string length is still governed by cold-weather open-circuit voltage. Calculate the site-adjusted Voc against the inverter’s absolute maximum DC voltage.
Bifacial gain is a design input, not guaranteed energy
Rear-side production depends on albedo, row spacing, mounting height, shading and rear obstructions. Avoid treating the datasheet bifaciality factor as a guaranteed site yield.
Connectors and cable routing matter
Use manufacturer-approved connector combinations, conductor sizes and bend radii. Heavy modules can place unexpected strain on poorly supported leads during installation.
Document the exact module revision
Large module families often contain several watt classes and connector options. Keep the exact datasheet and module code with the design record. See the panel-current and MLPE guide and browse verified equipment before pairing a high-current module with power electronics.