Renewable Energy Engineering

Solar PV & Battery Sizing Calculator

Design solar PV systems, estimate energy generation, check inverter compatibility, and calculate battery storage requirements.

1 System Architecture & Load

Operating Mode Grid-Tied vs Stand-Alone Off-Grid

Daily Energy Usage Average household load

kWh/day

Peak Sun Hours (PSH) Daily average solar irradiance

Hours/Day

2 PV Module Specifications (STC)

Panel Rated Power (Pmp) Single module Wattage

Watts

Open Circuit Voltage (Voc) At Standard Test Conditions (25°C)

Volts

Voltage at Max Power (Vmp) At Standard Test Conditions (25°C)

Volts

Voc Temperature Coefficient Typical silicon: -0.27 to -0.35 %/°C

%/°C

3 Site Environment & Inverter Specs

Minimum Ambient Temperature Lowest historical cold morning temp

°C

Maximum Ambient Temperature Peak hot day ambient temp

°C

Inverter Max DC Voltage Absolute safe DC input limit

Volts

Overall System Efficiency Loss Inverter, wiring, dust & temp losses