Piller Power Systems POWERBRIDGE kinetic energy storage (PB6+ and PB60+)
Piller's kinetic energy store, a direct replacement for a battery string rather than a UPS in its own right
Piller Power Systems POWERBRIDGE kinetic energy storage (PB6+ and PB60+) is one of 22 UPS systems tracked in the SecondWatt catalogue, each with specifications, lead times and indicative secondary-market pricing.
Piller POWERBRIDGE dossier: kinetic energy storage at 60 MJ and above 3 MW peak, why it is not a UPS, host CPM specs, and a used-unit inspection checklist.
POWERBRIDGE is not a UPS, and that correction should lead any listing. Piller's own copy describes POWERBRIDGE units as configurable singly or in parallel with a variety of Piller UPS units, and the same pairing model appears three separate times in Piller's catalogue: storage on the UNIBLOCK UBT+ is an option between batteries or flywheel, the CPM names the POWERBRIDGE PB6+ as its storage element, and the UB-V Series is offered in battery and kinetic energy storage versions. Functionally it is the direct replacement for a VRLA or lithium string. It has no rectifier, no inverter, no static bypass and no load-side output of its own, so on a marketplace it belongs in a UPS energy storage subcategory alongside battery cabinets. A POWERBRIDGE separated from its host UPS is a component and should be priced as one. The published specifications are storage specifications: up to 60 MJ or more per unit in the PB60+ designation, peak power above 3 MW, and 1 MW of electrical power for over 60 seconds. Construction is a vertically mounted flywheel and generator using magnetic bearing technology, with bearings greased automatically from a reservoir, a design life above 20 years, up to 90% floor space saved against batteries, no air conditioning required, and no environmental disposal concerns.
Why it matters
The category needs a clean line between UPS and stored energy, and POWERBRIDGE is the clearest test case for it. Every pricing confound in used UPS comes from cabinet and storage being bundled, unbundled or silently omitted. A product that is explicitly storage and explicitly not a UPS forces the schema to get this right, which is why the correction matters beyond this one record.
Who buys it
Owners of Piller UPS systems specifying kinetic storage instead of a battery plant, and data center designers who want deterministic stored energy with no disposal liability and no battery room. Because the product only ships paired to a host UPS, secondary supply is structurally thin: units reach the market as part of a whole-system decommission, not as standalone assets.
Role in the data center
Battery-replacement energy store on a Piller UPS bus, sized for short high-power ride-through with no battery room, no disposal stream and no dedicated cooling.
Key specifications
| Product class | Kinetic energy store paired to a host UPS |
|---|---|
| Energy capacity | up to 60 or more per unit (PB60+) MJ |
| Peak power | above 3 MW |
| Ride-through | 1 MW for over 60 seconds |
| Construction | Vertically mounted flywheel and generator, magnetic bearing technology |
| Bearing maintenance | Greased automatically from a reservoir |
| Design life | above 20 years |
| Footprint saving against batteries | up to 90 % |
| Host CPM module rating | 300/360 kW scalable to 2,400/2,880 kW |
| Host CPM storage element | POWERBRIDGE PB6+ |
| Host CPM efficiency | above 96 at 25% load (IEC 62040-3), up to 98.5, near 99 in VFD % |
| Host CPM short-circuit withstand | 100 kA |
| First deployment | 1990s, as the world's largest kinetic energy store for battery replacement |
Technical summary
Product class: kinetic energy store, paired to a host UPS; not a standalone UPS Energy capacity: up to 60 MJ or more per unit (PB60+ designation) Peak power: above 3 MW Ride-through: 1 MW of electrical power for over 60 seconds Construction: vertically mounted flywheel and generator using magnetic bearing technology Bearing maintenance: bearings greased automatically from a reservoir Design life: above 20 years Footprint: up to 90% saved compared with batteries; air conditioning not required Host example: CPM at 300/360 kW modules scalable to 2,400/2,880 kW using the PB6+ CPM efficiency: above 96% at 25% load per IEC 62040-3, up to 98.5%, approaching 99% in VFD mode
Pricing and availability
Trend: up Warranty, used: 1-year typical from refurbishment dealers.
Lifecycle and maintenance
Flywheel and rotary systems are built around a 20-year design life with no stored-energy replacement, which is the whole economic case against batteries: Active Power markets CleanSource as 20+ years with no battery changes and VYCON rates the VDC above 20 years with runtime that does not degrade. The consumables move to bearings, vacuum and capacitors instead, at a ceramic bearing cartridge every third year on CleanSource HD, annual vacuum-pump oil with an 8-10 year pump on the VDC, and DC capacitors at 7-8 years. Piller extends rotary service intervals to 5 years with condition monitoring. Service history, not calendar age, sets the value of a used rotary asset.
Common failure points
- Bearings — Ceramic ball bearings wear on a fixed interval and a missed change ends the machine
- Vacuum integrity — Lost vacuum raises windage losses and the published runtime no longer holds
- DC capacitors — Aged DC capacitors degrade the converter and the energy it can deliver
- Bearing controller electronics — Active magnetic bearing controllers are proprietary and not field-substitutable
- Generator dependency — Ride-through is 15-60 seconds, so a slow or unproven genset leaves the load exposed
- Lubrication systems — Auto-greased bearing sets run dry when a decommissioned unit sits unserviced
Inspection checklist
Bearing type — establish it first; CleanSource HD runs ceramic ball bearings, the VYCON VDC uses 5-axis levitation Bearing service log — Active Power specifies a cartridge change every 3rd year on HD and every 4th on PLUS MMS Vacuum system — VYCON runs a medical-grade vacuum pump on annual oil service with an 8-10 year pump life DC capacitors — VYCON publishes a 7-8 year replacement point for the VDC's DC capacitors Rotor drop log — the VDC spins 18,500-36,000 rpm and recovers from backup-bearing drops a limited number of times Grease reservoir — Piller POWERBRIDGE auto-greases from a reservoir; an unserviced one voids the 20-year life case Runtime verification — CleanSource HD holds 15 s at 100% load, 29 s at 50% and 56 s at 25% per the UL datasheet Flywheel data — HD spins a steel rotor at 7,700 rpm storing 10.2 MJ; the 6.2 MJ web figure is a page error Efficiency — check against the datasheet: HD is 96.5% at 50% load and up to 98% at full load Generator interface — a flywheel is a bet on the genset; verify start-to-load against a 10-second class requirement Ambient limits — CleanSource HD is rated 32-104 degrees F (0-40 degrees C); verify how the unit was stored Controls and parts — magnetic bearing controllers are proprietary; VYCON ownership has been undisclosed since 2022 Parallel rating — HD parallels up to 7 systems for 4,725 kW; confirm frame count matches the nameplate claim Standards — confirm UL 1778 and cUL CAN/CSA 22.2 No. 107.1; the VDC's UL scope covers 400-600 VDC only Service entitlement — get a written parts letter; Active Power runs a 135,000 sq ft Austin plant with 24/7 service
Procurement channels
Direct from Piller as part of a UPS system order. There is no independent dealer channel and no standalone product page: Piller has folded POWERBRIDGE into its storage-options page and into the CPM product, and no POWERBRIDGE brochure appears in the current download sitemap.
Regional notes
Sold globally through Piller's own subsidiaries and service centres, with US coverage through the Piller and Active Power organisation. Piller does not publish regional variants for this product.