The person above has already provided you with some excellent information and comments. I'll see if i can add to that a tad...
We live off-grid, meaning that we have no provided electricity and must create and store our own. What we have learned has been both costly, and often labor-intensive. I’ve put a link below to some articles that would be very helpful – especially the wind and solar charts links.
If you’re going to fully convert to solar or wind, one of the greatest expenses will be your battery bank: the place where your energy is stored for use when there is no sun or wind. We started with 12-volt, at the advice of a company selling solar/wind – but later changed to the much more efficient 24-volt system. Whatever you think you’ll need in the way of batteries – add 20%, really.
Before you venture into making the change, I highly recommend spending a while doing the relevant math: how much power do you need? What is the maximum draw you’ll require? How long will you be required to run on batteries? How many watts will your inverter need to provide? Where will you place your battery bank? Will your area provide adequate solar or wind power on an annual basis? Will you keep your grid power and augment it with solar? If so, can you get money from your power company for electricity you sell back to them?
Also, be sure to check local codes first – especially if you live in a place where there are neighborhood rules – you may not be able to install solar panels reasonably, or a wind turbine.
If you want to run a normal house on solar or wind, you can expect to spend a great deal of money – many, many thousands of dollars, in fact. There will also be upkeep, repair and replacement of parts.
One of the problems we encountered came when we went to install our battery bank. Batteries emit toxic gases, and wherever you store them must be vented – out of the house. Also, batteries work best at 72° - which makes winter and hot summer use problematic, unless you have made arrangements for some kind of temperature control.
It occurs to me that one of the cheapest methods for producing your own power would be to stay on the grid and augment with solar. Wind requires a tower – and I wouldn’t consider a tower less than 60’ tall, which is costly to get installed due to the concrete requirements for its base, and the machinery used to raise it. (We have solar and a wind turbine.) The problem with augmenting grid with solar is the basic cost of the change. Right now, you can get a 100 watt solar panel for about $1,000. 100 watts does not run much, as you can imagine. Also, it must be wired to a charge controller, inverter and your power mains. This is a pricey adventure, to be sure.
Be sure you note how much power your solar panels will actually produce: the new ones are better, but do not provide 100% - and what they do provide they only provide for limited hours of each day.
Where I live, many people have green power. The biggest problems we’ve all encountered include: too few solar panels; too small of a battery bank; and too small of an inverter system. I’ve done all of my own wiring and installed my panels and wind turbine – including the tower. I have spent about $30,000 over the years, but now have a very nice power system. I do dread the day I will have to replace my $12,000 battery bank!
I hope this helps a bit.