It is a 2.5kva gen set.It has a 10amp(ac)output.I repaired many of these whilst in.Most WKSP vehicles had 1 to run power tools etc.Signals units used them for smaller current draw equipment or small detatchments.Engineer units had them cos they could.They are a 2 person lift(haha) compared to the 10 and 15kva gensets which were a 4 person lift.Designed to run for 8hrs on a tank,be air portable(parachute drops).Basically any unit that had requirement for portable 240volt power had,or had access to,them.Unfortunately I threw out all my notes/wiring diagrams for all the equipment and vehicles I worked on(my trade was an Electrical Fitter/Refrigeration Mechanic) a few years ago,thinking they wont be needed.Cheers Hallsy.