Expert Solar Advisors' team guarantees that the solar system will produce the electricity promised with a 25-Year Production Guarantee. This guarantee is a promise that your system will produce a certain amount of energy, but not actual savings. You should carefully consider if the usage and rates shown in your proposal are accurate. Keep in mind that many homeowners will use more electricity after going solar. There are steps to take in order to keep your usage the same or lower. By accurately determining your current usage and future usage increases, we can design a system to account for this.