<style> html.dark-theme, html[data-theme="dark"] { background-color: #1a1a1a !important; color: #f5f5f5 !important; } body { background-color: #1a1a1a !important; color: #f5f5f5 !important; } </style>PV System Calculator

Input Parameters

Inverter Max DC Input Power:

Maximum DC power the inverter can handle

Inverter Max Input Voltage:

Maximum DC voltage the inverter can accept

Inverter Max Input Current:

Maximum DC current the inverter can handle

PV Module Power:

Rated power output of each PV module

PV Module Voltage (Voc):

Open circuit voltage of each PV module

PV Module Current (Isc):

Short circuit current of each PV module

Safety Margin:

Safety margin for temperature and degradation (5-15% recommended)

Results

Max Modules/String: —

Max Parallel Strings: —

Total Array Power: — W

Enter your system specs to see results.

PV System Reference

PV System Configuration Guide

Max modules per string = ⌊(V_max × (1 − margin)) ÷ V_oc⌋
Max parallel strings = ⌊(I_max × (1 − margin)) ÷ I_sc⌋
Total array power = modules per string × parallel strings × module power

Safety Margin Explanation

The safety margin accounts for temperature, module degradation, and voltage fluctuations. Commonly 5–15%.

String Voltage Considerations

String voltage varies with temperature. Cold conditions increase Voc, so design for worst-case winter temperatures to avoid exceeding inverter limits.

Module Matching

Use identical modules within each string. Mismatched modules can reduce overall system performance due to current limiting effects.