There is nothing that drives up your energy bills faster than children. Between computers, charging cell phones and televisions being on all the time, it can be frustrating as a parent to keep reminding your kids to conserve the electricity. For this reason, switching to solar is a very family friendly option because it reduces your electricity bill tremendously.
How dense your solar panels are will determine their efficiency. Getting high density solar panels may cost you quite a bit, but after a while they'll pay for themselves because they produce more power. Before you select your solar panels, you should consider panel density.
This video is about making a simple Solar RC plane under 60$. links: 2D plans and documentation: http://diy-india.org/diy-solar-rc-plane/ tiny …
Understand the limitations of solar water heating. The best systems are one third more economical when compared to energy efficient electric water heaters. Don't assume that early morning showers involve only cold water. The water in the tank should stay hot for at least 24 hours.