hi,
If you just want to power up the tools, to check that they run OK, depending upon on the power rating of the tools, you could use a battery pack and a mains invertor.
Upto about 250/500Watts, you could use a standard 12V 60A/H battery with a mains invertor.
It is possible to get mains invertors that are rated at 1KW to 2KW, but the types I have seen require a 24V battery.
It is possible to buy a 1KW to 2KW petrol driven mains rated alternator, they will fit on the back of a small truck.
This would be my personal choice as its got so many other uses.
Hope this helps.