Battery Energy Storage Systems (BESS)

Developing and constructing a battery energy storage system requires balancing interconnection requirements, site constraints, permitting, equipment configuration, constructibility, and cost within a compact and highly integrated facility. Timmons Group helps developers, EPC contractors, and owner-operators manage these challenges from early development and interconnection planning through detailed design, construction, and commissioning support.

Our multidisciplinary teams provide electrical, civil, structural, geotechnical, environmental, permitting, and construction support with a focus on the decisions that have the greatest impact on project cost and schedule. Our electrical engineers support interconnection strategy, system studies, collection systems, substations, and protection and control for inverter-based resources, while our civil and structural teams optimize site layouts, grading, drainage, access, and equipment foundations to improve constructibility and efficiently accommodate dense BESS equipment configurations. These disciplines work together to identify conflicts early and provide coordinated, construction-ready designs.

Timmons Group also serves as Owner’s Engineer, providing independent technical review of EPC designs and helping owners manage design risk, maintain technical and contractual requirements, and identify potential issues before they become costly changes during construction. With integrated services across the project lifecycle, we help clients reduce development risk, improve constructibility, coordinate disciplines, control costs, and successfully move BESS projects from concept to commercial operation.