Start by comparing local installers through the Clean Energy Council’s installer directory and checking recent, relevant customer reviews. Ask for a site assessment, a clear breakdown of the battery’s usable capacity, expected performance, installation work, warranties and ongoing support. Confirm the installer is appropriately licensed, uses compliant equipment and will arrange any required electricity distributor approval and grid connection paperwork. Obtain at least two or three written quotes, then check the battery’s warranty terms and whether the proposed system suits your energy use with an independent professional if needed.