Clean Energy Services (CES) is a Houston, Texas-based renewable energy services company specializing in lifecycle support for utility-scale battery energy storage systems (BESS) and solar photovoltaic (PV) assets. Founded in 2022, CES was established to provide field execution, commissioning, maintenance, remote monitoring, and technology-driven support for renewable energy infrastructure. In April 2026, FlexGen Power Systems acquired Clean Energy Services, and CES now operates as Clean Energy Services, a FlexGen company.

CES focuses primarily on battery energy storage system services, followed by utility-scale solar services. Its BESS capabilities cover installation, commissioning, preventative maintenance, corrective maintenance, augmentation management, remediation, spare-parts coordination, and long-term asset support. The company states that its teams have commissioned more than 15 GWh of battery storage projects, while its current website reports more than 10 GWh commissioned and over 1,300 BESS, solar, and long-term projects completed.

For utility-scale solar projects, CES provides installation and commissioning, preventative and corrective maintenance, multi-year corrective campaigns, repowering, electrical verification, PV string rewiring, module replacement, inverter replacement, and spare-parts management. The company reports servicing more than 1 GW of solar sites and supporting utility-scale renewable assets across the United States.

CES also operates a 24/7 Remote Operations Center (ROC) that provides real-time monitoring, diagnostics, and technical oversight. Its technology solutions include analytics, dashboards, data-driven asset management, and energy-management software designed to help renewable asset owners monitor performance and identify operational issues.

The company maintains a nationwide field presence and states that it supports BESS projects in all 50 states. Its Houston headquarters is located at 4201 Main Street, Suite 530B, with additional ROC facilities in Houston.