I also love mine. It lives in a section of the TV cabinet, and I have not noticed the fan coming on more often than when it was standing beside the cabinet....yes I can still hear it. I do have a question though @bloupotlood, regarding the battery indicator, has yours ever dropped a bar? The 4 bars on mine has always been constant but I expect that's not extremely accurate. Mine has a 100ah LiFePo4 battery.
Also planning to add solar panels for when we have daytime loadshedding - would love to see some pics of your setup.