That seems to be a retailer offering big and small (5kWh) systems.
A great many products are imported Chinesium, some rebranded. Some relabelers provide value-add, like updated software and support, UL listing, possibly specified hardware differences. Can be good/bad/ugly. Obviously some equipment manufactured in China is premium quality. You really want to know about customer experiences with a given product, but unfortunately it is quite opaque.
Also, many companies are great at putting up a good web page. I've read the web pages of current/former employers.
There are a handful of companies we know made inverters and charge controllers that worked for several decades. Trace/Xantrex/Schneider, Outback, Midnight (newer company, the people from Trace), Victron, SMA, some others. Any unknown company has a track record only as long as they've been around, and it is with difficulty we even determine what their failure rate is.