I live in Barcelona with my family and we are planning to buy alternative power for our home. So I want to ask you guys that how many watts inverter we would need to power a 2TV, 5CFLs, 1 l laptop and a fridge & a washing machine too? Do I need a separate solar water heater for heating water? What type of battery do we need to hook up to the inverter? Will inverter work when electricity shuts down? Please help so that I can opt for a best solar system power.