What is the average payback period on a grid-tie system?
A. From an economic standpoint, the problem with that question is the concept of “average.” The numbers that go into this average change wildly based on the size of the system as well as whether or not the system is in a state that has a good rebate program. Non-rebate state systems generally cost 30-40% more than if the same system were installed in a state with a good rebate program. That all being said, the range is between eight and 18 years, assuming flat energy costs. From a value standpoint, many people believe that providing some or all of their electricity from non-polluting means, as well as supporting the American jobs for installers, is an immediate payback. If the discretionary money is available and it is something that is seen as duty to self, country and planet, then the payback is not the primary motivator. I love asking: “So, what is the payback period on a new BMW?” I usually get silence on the other end of the phone. Nobody thinks to ask that question, yet a grid-ti
