Company

Active Power

Rocket Ship Rating

Rocket Ship Rating: 79 out of 100

Leaders in battery-free flywheel UPS

Also known as Active Power Solutions Ltd

Clean energy & storage
Climate positive
Hardware

Status: Acquiredas of 2026-09-18Source (opens in a new tab)
Business model: B2B
Headquarters: Austin, Texas, United States
Founded: 1996
Customers: enterprises around the globe
Legal name: Active Power Solutions Ltd

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Record updated 28 September 2026

About

Active Power is a pioneer in the design and production of battery-free flywheel uninterruptible power supply (UPS) systems.

Funding snapshot

Total raised: $7.7MSEC form D sum, as of 2026-09-28Source (opens in a new tab)
Latest round: Round, $4.7M2017-05-04

Funding rounds

Round, 2017: $4.7M2017-05-04, SEC form D sold, 1 investor
Round, 2009: $3M2009-05-29, SEC form D sold, 1 investor

About the company

Status notes: In November 2016 the business was acquired by the German Piller Power Systems group.

Products

Hardware: CLEANSOURCE UPS

Exit

Acquisition: 2016-11