Solbian are afaik made in Italy
, and only sold
though trained professional system integrators.
Renogy makes nothing, is just a mass marketing
relabeler selling consumer level crap from China
they used to have decent customer service
but that was years ago
but quality was always crap.
Semi-flex panels as a niche is in itself barely sustainable, lifespan a small fraction of glass framed units.
To get more than average 2-3 years in a mobile context, installation
on a rigid mounting needs to be perfect,
no actual flexing at all involved once installed, heat sinking built into the design, so no weight savings.
The only advantage is the ability for that rigid mounting surface to be curved.
So, you pay more for high risk of a much shorter lifespan.