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M&AClosedPress / newsApril 2, 2026

FlexGen acquires Clean Energy Services (CES) — BESS commissioning and O&M platform (15+ GWh commissioned)

FlexGen Power Systems (Durham, NC) acquires Clean Energy Services LLC (Houston, TX), the industry's leading BESS commissioning and O&M platform — 15+ GWh commissioned over its lifetime, 4.5+ GWh of active battery sites under management, 1+ GW of solar serviced. CES continues operating as a FlexGen subsidiary. The acquisition creates a vertically integrated BESS software + commissioning/O&M model, strengthening FlexGen's position as a full-stack battery storage solutions provider. CES was founded in 2022 by Ahmad Atwan and Constantine Triantafyllides.

BESS

Technology

TX

Location

Project: FlexGen acquires Clean Energy Services (CES)Asset profile →
MarketsTexas

Deal Details

Deal Type
Corporate M&A
Seller / Sponsor
Clean Energy Services LLC (CES)
Buyer / Financier
FlexGen Power Systems
Deal Value
Undisclosed
Stage
Operating

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