Thanks for your thorough feedback!
I just read that the Solarworld is a rebranded Stecca so I'm tempted to go with that one.
Where do you install if not the loft? I would have thought you'd want it as close to the panels to keep the losses down on the DC current?
Looking to get a solar power system installed and the company originally quoted us with an Afore HNS3600TL. I couldn't find much on these other than they're a reasonable Chinese brand with long warranties.
They have also offered the following models instead:
Solarworld Sunplug 3.6 TL1i
Aurora...