I would recommend Off-Grid Energy Australia. From the beginning they were the only solar company that I spoke to that actually listened to what I wanted out of a solar and battery system.
Aaron and team spent a lot of time discussing and designing a system which met my requirements as well as complied with the restrictive rules set out by the electricity distributor.
When there was an issue with how the system functioned after installation, they were quick to come out, diagnose the problem and fix it.
I found them a very professional company to deal with.