Seal of ExcellenceBased in Southern California, the Otto H. Rosentreter Company (OHR Energy) is a power development company and a design-build engineering firm. We provide turnkey, renewable energy systems for commercial, government, and utility customers. Our mission is to reduce our customers’ energy costs, alleviate our dependence on foreign oil, preserve our country’s valuable resources and make our environment a cleaner place to live.

OHR Energy has been in business for over 62 years, historically serving the foundry industry. Over a decade ago, we began to broaden our services by looking for alternatives to lower energy costs. We found that emerging renewable technologies combined with state and federal financial incentives achieved that goal. Today, we are able to evaluate our customers current electricity needs and deliver a completed fuel cell and/or a solar array project, from the financing and permitting to the design and installation.

We’ve completed major projects for universities, manufacturing plants, the hospitality industry and local municipalities. Our customers’ universal experience is that we are experts who are reliable and committed to providing a personal touch to each project. Customers can count on OHR Energy to design and install fuel cells and solar panels systems to meet their needs. Our commitment to quality on renewable energy projects has earned us awards in electrical excellence from the NECA, project achievement awards from the CMAA as well as recognition from the “Energy Leaders of Today”. Currently, we have installed more fuel cells in California than any other renewable energy company.

Increase your bottom line.
Decrease your carbon footprint.

OHR Energy holds a California Contractors License (212038) with A, B & C61/D21 Classifications. OHR Energy is a Minority Business Enterprise (MBE), registered through the California Public Utilities Commission’s Supplier Clearinghouse (VON: 11040050). OHR Energy also holds a Small Business (SB) certification through the State of California Department of General Services (1398300).