Why on earth would you want to run a portly from the van ?, reducing its limited performance even further.
Don't think there is a straight forward answer to that , just arguments pro and against ...
If i was to give a practical example in favor , u have to do an apartment ,perhaps its P***** rain , instead of hauling all the gear out u just pull up close as you can ... grab your cords ... plug in . If you have a reel just haul out the hose ...
from then on you shouldn't have to go outside or switch off the machine with a tank setup ...
Its mostly convince i suppose ... will work better on some occasions more than others .
neil ... you are right of course ... but '13amp' cable is 1.5mm ,which no on should be using on higher demand gear ..
the scorpion comes with 2.5 mm cords ( if im not mistaken ) then you should just need two more 2.5mm cords <50' or so ..
with 2.5mm the cable wont over heat like 1.5mm ... the plug fuse will be the weak point .