Solar systems often make financial and ecological sense for our clients. In addition to acting as a guaranteed investment, solar energy creates electricity and heat and avoids pollution from conventional coal plants and nuclear plants. Some individuals buy solar to preserve the Earth’s finite fossil-fuel resources and to reduce air pollution. Others make a strict evaluation of the net present value of the investment in solar. Some customers would rather spend their money on an energy-producing improvement to their property than to send their money to a utility. Other folks value the security of reducing the amount of electricity they have to purchase, making them less vulnerable to future increases in the price of electricity.