how to make a buffer or battery bank

Hey!

I've got a little project going on, but before i really get things going i want to know something first.

Today i pay for the juice from the grid, 230V.
My question is how could i use multiple power producing units to reduce the amount of power i have to purchase off the grid.

If i have in.ex 3 wind turbines @24V, and i transform it up to 230V to get it compatible. How can i solves this problem ?

So if my entire house (using random numbers) draws 10000W from the grid, but then i start up med wind turbines that produce 500W each, a total of 1500W, then in theory i should only take 8500W from the grid.

Anyone who understands my not so good explanation and have a great suggestion ?

Hope for good answers :D

Regards
Solefald

Solefald- Not the answear you probably want, but here goes. Wind power is complicated, and it can get expensive! Winds are inconsistent and that complicates everything in regards to estimations of power production. If you haven't started, I'd suggest just start with 1 windmill, and see what you can do with that. You will need tower(s) and then you will have serious safety concerns/issues. You will also need knowledge of electrical or know someone who does. Wiring can also be complicated, and again potentially dangerous. I really don't know jack about all of this, as I have just done my first windmill, but I thought it would be a 1 weekend project just for fun, and now it's been literally weeks and I bet I've got over $800.00 US invested, with what will be years, if ever, return on investment. So yes, it can be done, but not easy or cheap. Good luck, and post progress and results!
Terry- new01xkrowner.