I guess there is more to it than throwing $$ in exchange for solar panels, batteries and inverter. Based on the following link fron home depot it takes about 3ft x 10ft area to generate 480watts. And i am sure it assumes a bright sunny day with the system running in ideal condition at 100% efficiency.

Average rice cooker is about 400 watts..
Induction heaters 1 to 2000 watts(energy stored in battery during off peak time will help a bit here)..
Dont know what does fridge and other devices amount to.. Electric vehicles will probably be a few thousands of watts while charging ( unless you are willing to trickle charge and wait days for it to get fully charge). Do the maths and see how it works. See what is the rooftop area on average houses where you can get proper sunlight and see for how many hours a day will you get that light. Mind it that you loose that sunlight intensity in winter and cloudy days.

You cant go by the words of a car salesman when you buy a car.

I guess it's more important to have a good idea of how you are going to use that solar electricity ..eg using led lights, not running unnecessary appliances..riding bicycle or walking where possible instead of hopping on a vehicle..

Electric vehicles seem to be a big buzz word. But the fact is that even USA is not prepared for it. The power transmission line even in USA was not laid out with the idea of everyone charging their cars at the same time.

http://m.homedepot.com/p/Grape-Solar-480-Watt-Off-Grid-Solar-Panel-Kit-GS-480-KIT/204733239