Solar Panels Havre de GraceCommunityCommunity ResourcesGreen InitiativesSolar Panels City-owned buildings are now 100% powered through solar sources. This change allows Havre de Grace to be both environmentally conservative as well as fiscally responsible. Havre de Grace’s Director of Finance George DeHOrity led the charge to negotiate the best possible contract to take the City of Havre de Grace to a 100% solar-powered municipality. The benchmark for completion will be the end of December 2016. That contract was made with Constellation Energy who supplies the City with just over six megawatts per year of electricity for municipal operations. Constellation Generation advised the City of Havre de Grace that the source of this solar power is derived from a 20-megawatt solar generating facility in Perryman, located a short distance away in Harford County.