Payload is the larger one at 785kg.
Would 450 L be over loaded for one man?
So with my maths
450kg Water
30kg for tank
15kg for frame
5kg pump
20kg hose reel
12kg backpack and trolley
5kg roof bars
5kg ladders
15kg battery
100kg me
10kg cones
10kg ply lined
35kg fuel
5kg Poles and heads
10kg Spares
Works out to be about 720KG.
From memory, when i took my van down to the weighbridge it was 180Kg spare.
That was with me in it, and with about 300L.
So being realistic 450L too risky?