The KF1 EV is rated at 1,500 kg. That is the figure to plan against, and it is the one that decides whether a vehicle is right for your work — not the bed, not the drop sides, not the turning circle. Load first, dimensions second.
Which way the constraint bites depends entirely on the trade. Carry cement, tiles or steel and you will reach 1,500 kg long before you run out of floor, so the payload is your limit and the bed is irrelevant. Carry produce, cartons or furniture and it inverts: the mass is trivial and you are stacking against the sides, so the geometry is everything and the rating never comes into it.
Which is why this piece does not print bed dimensions. The numbers we hold for them are placeholders, and a measurement you plan a business around should come off the actual vehicle with an actual tape. Ask to load it before you buy it, with the thing you will really be carrying.