Clean Energy Advisory Board; low-to-moderate income solar loan and rebate pilot program and fund. Establishes the Clean Energy Advisory Board (the Board) as an advisory board in the executive branch of government for the purpose of establishing a pilot program for disbursing loans or rebates for the installation of solar energy infrastructure in low-income and moderate-income households. The bill provides that the Board shall have a total membership of 15 members, consisting of 14 nonlegislative citizen members and the Director of the Department of Mines, Minerals and Energy, who shall serve ex officio. The bill establishes the Low-to-Moderate Income Solar Loan and Rebate Fund to be used to fund loans or rebate payments to electric customers who complete solar installations or energy efficiency improvements. The bill provides that the pilot program is open to any Virginia resident whose household income is at or below 80 percent of the state median income or regional median income, whichever is greater. The bill establishes application requirements and procedures for the review and approval or denial of applications. The bill requires that each applicant document the installation of energy efficiency services to demonstrate that such services lower home energy consumption by at least 12 percent prior to the submission of an application. The bill has an expiration date of July 1, 2022.