Power, power, power hungry...or not so much?????

Solar panels.. this is by far the cheapest I have found. And from the discription, perfect for what I need. Only about £700 including the battery! http://www.solarshop.co.uk/solar-panel-120w.htm

Need to double check this has enough power for hot water showers, my laptop and cooking, which alas will be electric not gas as dont want to use fossil fuels(althrough gas is so much quicker to heat up a stove/oven and cool it down again, meaning I can use the stove top as a counter more easily)

But with government grants available of up to £2500, and a £250 discount through Able and Cole veg boxes, I definitely need to keep the options open. Also want to look more into wind power, and the possibility of selling power back the the grid.