Since the Cheaper Home Batteries Program launched in July 2025, Australia has been in the middle of a full-blown home battery boom. What was expected to be a steady, decade-long rollout has instead turned into one of the fastest-moving energy programs the country has seen.

In this guide, we’ll break down how popular the rebate has been so far, what the numbers actually look like, why the funding may not last to 2030, and what this means if you’re thinking about adding a battery to your solar system.

One of the most common questions homeowners ask when considering solar is: “How many panels do I actually need?” It’s a smart question because the answer depends on your energy usage, roof size, panel wattage, future plans (like EVs or battery storage), and more. Get it right and you’ll maximise your savings and system performance. Get it wrong, and you may under-perform or overspend.

This guide walks you through the key factors, practical steps, and real numbers to help you estimate the right number of solar panels for your home, and what to talk about with your installer.