I think the best idea but well ... not yet "perfect" is to be independent from the electricity monthly costs.

Idea like this one:

http://www.pennenergy.com/content/dam/Pennenergy/online-articles/2013/May/Conergy%20Casa%20d'Amore%20Brisbane%20Australia.jpg

Solar power plant in your own building is the future of low electricity costs.

At the moment devices needed to make it happen are quite expensive and you need many years to ROI investment




Kind regards.