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Aerial view of a Louth Callan array under snow with crew working between the rows.

What we do

Utility Scale Solar.

At Louth Callan, we specialize in delivering some of the most complex and challenging solar projects across the United States.

We Thrive Where Others Hesitate.

Louth Callan is a power infrastructure construction company delivering utility-scale solar across the United States. Our value starts early. In-house engineering at the pre-award stage, identifying risk, challenging assumptions, and shaping a buildable project before construction begins.

We thrive where others hesitate—turning obstacles into opportunities and ensuring every project meets the highest standards of safety, efficiency, and performance. With a proven track record from coast to coast, we power progress through precision, resilience, and sustainable energy solutions.

Constructed nationwide

Over 6.4 GW of Utility-Scale Solar.

Field-Tested, Responsible Solar Construction.

We’re built for flexibility. Fully engineered EPC delivery from greenfield through commissioning. Owner-provided IFC drawings executed with the same rigor. We design the whole project, or we build a fully baked package — whatever the project and the client require. Our deep field execution experience, adaptability, and alternative foundation expertise are how we consistently deliver projects that meet utility standards and investor expectations.