Advanced Distributed Generation, LLC. (ADG) is the Midwest’s leading photovoltaic system integrator. ADG is a general contracting company specializing in the design and installation of photovoltaic (PV) systems. ADG’s partners, John Witte and Mark Tuttle, have a combined 35 years of experience in the renewable energy industry. This experience includes project management, system sizing, installation, design and consulting, component sales, PV system operations and maintenance.

ADG's customers include State of Ohio, State of Michigan, Department of Defense, Department of Interior, First Solar Inc., Detroit Edison, American Electric Power, BP Solar, City of Bowling Green Utility Department, City of Westerville, Ohio, Astropower, Energy Conversion Devices, and the Foundation for Environmental Education as well as many commercial and residential customers. The installed capacity of ADG projects is approximately 500 kW of grid-connected PV.

ADG is a licensed general contractor in Ohio and Virginia and soon to be licensed in Michigan, Illinois and Indiana. Construction contracting experience includes over 9 million in commercial construction projects and 4 million in PV installations.

Mr. Witte and Mr. Tuttle are industry certified PV system integrators and play an active role in the training of practitioners new to the renewable energy field.

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