Thanks for your input Jon,
I've had a good look around here and had a talk to the Chief and gave him some prices and we are going to go with a Generator unit.
It's too much mucking around with batteries and so forth if I go the other route.
And yes Alan, it WILL be attached to some steel sunk into a concrete pad, with a removeable cage over the top of it.
If it doesn't get pinched, it will either be vandalised or have the fuel siphoned out of it otherwise.
No-one's immune from that sort of behaviour here, not even the Fire Brigade. [Linked Image]