You are absolutely attempting to preserve money, but you can save more in the end if you replace them. You can expect that your bills will go down as the new models do not up a lot of energy.
If you will try using these renewable energy sources along with your existing supply, your bills will certainly go down. This will definitely be a great method to decrease your regular bills.
This is definitely a big problem for the individuals who are not using solar or wind energy as alternative sources. They are pretty expensive until now so some folks think that it will not be beneficial to regular households.