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Solar PV Sizing Calculator

IEC 62548 & IEC 60364-7-712 — string voltage window, inverter matching, and DC/AC cable sizing for a single string and inverter. Multi-string parallel arrays with combiner/feeder sizing are a subscriber feature.

AAJappsEngineering Calculation Report

Solar PV Sizing Calculator

IEC 62548, IEC 60364-7-712

Generated

For preliminary engineering use only — always verify results against project-specific standards and a qualified engineer's review before use in a real design.

PV module

V
V
A
A
Wp
%/°C

Array & site conditions

°C
°C

Inverter

V
V
V
A
kW
V

DC cable

m
°C

AC cable

m
°C

Multi-string array

Subscriber
Preview only — full multi-string combiner/feeder sizing unlocks with subscriber accounts.

String voltage window

Vmax (cold, Voc basis)1,047.4 V ✗
Vmpp range (hot → cold)733.7 – 878.1 V ✗

Current & cable sizing

String design current (Isc × 1.25)17.38 A ✗
DC cable size4 mm²
DC voltage drop1.38%
AC cable size2.5 mm²
AC voltage drop2.06%

DC:AC oversizing ratio

1.10×
11.00 kWp array / inverter AC rating

Multi-string array

Combined MPPT current (Np × Isc × 1.25)17.38 A
String OCPD required?Not required for ≤2 parallel strings
Recommended string fuse rating—