[StephenRowley]

http://www.instructables.com/id/Green-Solar-Powered-Water-Barrel/

This what i intend on making for my parents but it may have to wait a bit because you need a water pump from a caravan or such. and the ones with the built in pressure pumps are around £30 -50 on the bay second hand. I would also get a mains car battery charger to top up the battery.