WestSun installed a 15kWh battery for me, and upgrading my inverter and installing some new panels as well. A 10kW solar system additionally enough battery storage to hold a house through 3 days of inclement climate (see our short article: ‘Could you go off-grid by using a 10kW solar system https://solarinstallerswa.sport.blog/2024/09/19/the-comprehensive-guide-to-a-7-7kw-solar-system-in-western-australia/