Awful to non existant customer service from Sonnen Australia – I feel I need to write this review to warn all those intending customers of Sonnen Australia. I had a Sonnen battery with a Black Out Protection unit installed in 2018. And I have had numerous problems with the system cutting off all household power for no reason at all. One time when I was away from home, the power cut out and I returned to a fully defrosted fridge/freezer. I had to throw everything out. I did not receive one cent in compensation from Sonnen. My latest issue with Sonnen came in December 2022 with the battery not charging. After 7 months of chasing, Sonnen finally fixed the problem and said they would offer me some compensation. After 2 weeks of not hearing from them, I wrote to ask what was happening. To their credit (first time ever), they replied the next day and offered $500 in compensation. Can you believe this? $500 for the loss of use of a battery system I spent over $13,000, during summer. I wrote back on 1st August saying I thought $800 was a more reasonable ammount. So far, as per their appaling customer service record, I have not heard from them and certainly have not seen the $500 offered (which, by the way, I think is appallingiy stingy for a muti-national company). After a few weeks, during which I had to write to Sonnen again, they have sent me an additional $300 gift card, so I finally got what I thought was a reasonable compensation amount. There are plenty of solar battery providers in Australia, so if you are in the market for a battery installation, take note of my experience with Sonnen Australia