Solar Panel String Calculator

Calculate optimal series/parallel wiring configuration for your solar panels. Input your panel specs or choose a preset to get started.

Panel Specifications

Quick Presets

Panel Name

Wattage (W)

Voc (V)

Open circuit voltage

Vmp (V)

Max power voltage

Isc (A)

Short circuit current

Imp (A)

Max power current

Temp Coeff (%/°C)

Typically -0.2 to -0.35

Length (mm)

Width (mm)

System Configuration

Number of Panels

Battery Voltage

Standard

Panel Characteristics (Temperature Adjusted)

Calculated using STC=25°C, Min=-10°C, Max=70°C per AS/NZS 5033

Voc (STC)24.30 V

Voc Max (-10°C)26.43 V

Voc Min (70°C)21.57 V

Isc (STC)10.22 A

Isc Max (×1.25)12.78 A

Vmp Min (70°C)18.10 V

Recommended Configuration

Series

Configuration

4S 1P

Array Vmp

81.6

Volts

Total Wattage

800

Watts

Panels

panels

Wiring Layout

200W

—

200W

—

200W

—

200W

4 in series × 1 in parallel

Total Array Area3.54 m²

All Configurations

Config	S × P	Vmp Total	Voc Max	Isc Max	Busbar	Valid	Notes
Series	4 × 1	81.6V	105.7V	12.8A	—	✓	OK
2S2P	2 × 2	40.8V	52.9V	25.6A	—	✓	OK
Parallel	1 × 4	20.4V	26.4V	51.1A	Required	✓	OK