Imp and Isc describe different boundaries
Imp is the current at the module’s maximum-power point under the stated test condition. Isc is the short-circuit current. Inverter datasheets commonly publish both a maximum operating/input current and a maximum short-circuit current, and both limits matter when choosing modules and parallel-string arrangements.
Parallel strings add current
Modules in series raise string voltage while current stays approximately at one-string current. Parallel strings add current at the MPPT input. That means an inverter that accepts one modern high-current string may not accept two parallel strings on the same tracker even if the voltage remains within range.
Clipping is not the same as overcurrent approval
Designers sometimes oversize DC power relative to AC power intentionally, accepting some energy clipping. That does not authorize exceeding the inverter’s DC current or short-circuit ratings. DC/AC ratio, input current and voltage are separate checks and should be documented separately.
Bifacial modules need conservative design inputs
Rear-side irradiance can increase operating current beyond front-side-only standard-test values. Manufacturer design guidance may specify bifacial gain assumptions or maximum fuse/current boundaries. Use the correct module datasheet and local design standard instead of applying a generic percentage without evidence.
Check every MPPT independently
Use the MPPT string checklist with the panel datasheet guide. Exact compatibility depends on the module, tracker allocation, temperature and code-required design margins.
Use the exact string arrangement in the current check
A current limit belongs to an input or MPPT, not to the inverter name as a whole. Write down how many strings are paralleled on each tracker and calculate the resulting operating and short-circuit current for that actual arrangement. If a module family has multiple wattage bins, use the electrical row for the exact module being purchased. This prevents a visually similar module from being accepted against the wrong current specification.