Wattage is not the compatibility test
Two 450W modules can reach the same power with very different voltage and current. Optimizers and microinverters care about the electrical input window, so start with Vmp, Voc, Imp and Isc.
Check both operating and fault current
Imp describes current near maximum power; Isc is the short-circuit reference used in several design checks. Compare both with the MLPE manufacturer’s published input limits and any required safety factors.
High-current modules need deliberate pairing
Newer large-format and bifacial modules can have substantially higher current than older residential panels. Do not assume an optimizer advertised for a certain wattage is automatically suitable.
Connector and cable ratings matter too
A supported electrical pairing still requires compatible connectors, conductor ratings and installation methods. Avoid mixing connector brands merely because the shells fit.
Prefer manufacturer matrices
Where a manufacturer publishes a module-compatibility tool or approved pairing list, use it and save the checked date. Otherwise document the electrical calculation and label it as an engineering check rather than a manufacturer-approved pairing.