Founded in 1931, Energy Credit Union (ECU) is located in the Waltham Corporate Center on 2nd Avenue, near Winter Street. Energy Credit Union is a not-for-profit, member-owned organization that offers members a variety of financial services, including savings and checking accounts, IRAs, mortgages and loans. Fees for certain services may apply, and as a member of the National Credit Union Administration, all of the bank's deposits are insured. To be eligible to become a member of the ECU, you must be an employee of National Grid of New England, or live or work in certain communities in the greater Boston area. Please visit the ECU website for more information.