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String calculator

Temperature-corrected series-string sizing against the inverter's MPPT window and current limits. Pick a panel and inverter from the catalogue, set the site temperatures, and see the valid range — with every step shown.

Inputs

PanelInverterMPPT

Min ambient (°C)Max cell (°C)

Parallel strings on this MPPT

Inverter limits: max DC 600 V · MPPT 40–560 V · max 20 A/MPPT

Panel @ STC: Voc 39.6 V · Vmp 33.2 V · Isc 13.93 A · βVoc -0.25%/°C

Result

Valid pairing

Modules per string

2to13Recommended: 13

Voc @ -10°C (cold): 43.06 V; drives the max
Vmp @ 70°C (hot): 29.46 V; drives the min
Max modules: ⌊600 ÷ 43.1⌋ = 13
Min modules: ⌈40 ÷ 29.5⌉ = 2
Isc @ 70°C: 14.21 A
String current (×1): 14.21 A; within limit

⚠ Vmp temperature coefficient not supplied — approximated with the Voc coefficient.

Sample catalogue specs are unverified — confirm against datasheets before use. Optimiser/rapid-shutdown stringing rules (incl. 2:1 devices) come next.