GoSolarQuotes — Battery Size Calculator

Quickly size a home battery (usable & nominal kWh, power, and indicative PV charge time).

Make smart energy decisions in seconds with the GoSolarQuotes Battery Size Calculator — a quick, free tool that helps homeowners and businesses estimate the right solar battery capacity for their needs. Simply enter your average daily usage, backup requirements, and system details to see how much usable storage you’ll need, plus charge time and suggested battery combinations. The calculator is ideal for anyone planning a solar installation or upgrade, giving you a reliable starting point before speaking with installers. Designed with Australian conditions in mind, it factors in efficiency losses, depth of discharge, and system headroom for accurate, real-world results.