more questions were asked.
There are no batterys as it is not a stand alone. we are connected to the grid. so all the power I produce that isnt used by us get fed into the national grid. and if I need more power than I am producing I draw it from the grid.
The system cost us $15,000.00 after government rebates. We saved the money and have no borrowing costs.
Once again, free energy isnt the main reason we did this, we did this because we care about the enviroment.
If your only motivation is money then you need to do the math. how long it takes for you to get the money back depends on your energy useage and how much you get charged for it. Also how much the energy company will pay you for the energy you put int the grid.
Our provider pays us 66cents a kilowatt for the energy we put into the grid, we pay 21 cents a kilowatt for the energy we use.
So we try and not use alot of power while the sun is shining and once the sun goes down we turn on the washing machine and dishwasher. that way we will be 40cents per kilowatt better off.
The solar panels have a life of around 20 years, so I think then you have to replace them.
I hope this has answered your questions.