I was looking at an import inverter that advertised CAN and rs485 support both on the website and in the manual's specs section with zero further mention. I emailed the vendor and the manufacturer at least 4 times requesting documentation with zero response. Seems to be status quo for cheap import junk. Meanwhile outback power systems offers protocol documentation in the form of manuals freely downloadable. Incredible stupidity.
on the contrary, in my case it was phocos.com which seems to be germany based and sells in many countries so this isn't just your rando junk but they still insist on stupid stuff