Victron recomends 2 x 50mm cables why can i not use 1 larger cable? if so what size? the run is only 800mm
You won’t be able to fit it into the hole possibly. And it is easier to run 2x50 than 1x 95mm.
They need the full diameter. 2x50 is slightly bigger than 1x 95mm and because electrons are fussy this way, 1x 100mm has a different resistance to 2x 50. So also messes with performance.
What inverter exactly? An 8kVa? Or a lower voltage smaller inverter?
It is multi 2/ 12/100/30
With the 12v model it is important to use the double connection.