Powering AI. Instantly.

100× power density vs. batteries
1000× cycle life vs. batteries
UL-listed cells
South Deerfield, MA production
15%
smaller footprint vs. other supercaps
10 yr
design life in high-cycle duty
100×
power density vs. batteries
1000×
cycle life vs. batteries

Supercaps are critical at all levels of the grid

From the GPU rack to the substation, florrent supercapacitors respond in milliseconds to keep power steady.

Solutions for:

Compute racks have major power volatility issues

  • Utilities deny interconnection
  • On-prem generators fail
  • BESS degrades in months
Learn more →
Utility, on-prem generation and BESS feeding a compute rack with volatile demand
Data centers

Supercapacitors stabilize compute racks

  • +20% more compute revenue
  • Faster speed-to-power
  • Premier power quality solves volatility
Learn more →
florrent supercapacitor sidecar smoothing power between the grid and the compute rack
Grid · E-STATCOM

Providing grid stability at all scales

  • Frequency and voltage stabilization
  • Deliver 100 MW+ at 100 kV for about one second
  • Constant grid flicker correction
Learn more →
Commercial & industrial

Ride through the blips that stop production

  • Ride-through for voltage sags and short outages
  • Bridge power while generators start
  • Lower demand charges by shaving peaks
  • A fraction of the floor space of battery UPS
Learn more →
Chart: when grid power drops, supercapacitors carry the full load instantly while the generator ramps up, bridging the gap until generator power takes over
Microgrids & renewables

Steady power for islanded and renewable-heavy sites

  • Smooth solar and wind ramps
  • Instant generator and hydro start
  • Pair with batteries to shrink and protect them
Learn more →
Operating range
-40 to 65°C
Rated for remote, off-grid and harsh sites, with no climate-controlled room required.

our products

Next-generation supercapacitors, carbon to rack

data center solution

Supercapacitor Rack

florrent supercapacitors unlock smooth, high-density power in a data center-ready form factor.

10% Lower Cost

15% Smaller Footprint

Made in USA from sustainable biomaterials

Cells

floCAP™ supercapacitor cells

High-power cells that bridge the gap between capacitors and batteries, responding instantly to spikes in GPU demand.
See floCAP specs

Modules

floMOD™ supercapacitor modules

Ruggedized, finned-aluminum modules built on floCAP cells, in four sizes to match your power envelope. Peak shaving for AI data centers, artificial inertia for the grid.
See floMOD family

Who we work with:

florrent works across the power ecosystem, from the teams who build and integrate systems to the utilities that run the grid.

Frontier labs, hyperscalers, neoclouds

More compute, more revenue per megawatt

Supercaps smooth GPU power swings so clusters run at full throttle with no throttling, dummy loads, or oversized power. That's more sellable compute inside the same power envelope.

Learn more →
florrent supercapacitor sidecar smoothing power between the grid and the compute rack
Data center developers & colocation

Energize faster, stay online

A flat, compliant load profile helps you qualify for interconnection and right-size gensets and BESS. Maintenance-free ride-through then protects tenant uptime.

Learn more →
Power demand smoothed to utility nominal with supercapacitors
Critical facilities

Zero interruptions, zero battery headaches

Most power-quality events are sags and momentary interruptions lasting milliseconds to seconds, which is exactly a supercap's sweet spot. Supercaps ride through them or bridge to the genset, with no battery replacements, no thermal runaway risk, and a long life in hot or cramped electrical rooms.

Learn more →
Built for
Semiconductor fabs
Pharma and biotech
Hospitals
Financial and trading sites
Telecom and airports
Precision manufacturing
UPS, genset, turbine, BESS and rack OEMs

Protect the assets you already sell

Supercaps take the fast transients so batteries, generators and turbines see less cycling, wear and derating. They come as drop-in modules that strengthen your system.

Learn more →
floMOD supercapacitor modules
Utilities, IPPs, grid operators

Big loads that behave like good neighbors

Supercaps provide power quality, grid-forming inertia and fault ride-through at the point of interconnection, so large loads stabilize the grid instead of stressing it.

Learn more →
E-STATCOM grid stability graphSupercapacitor room in an E-STATCOM substation

The bottom line

Why florrent wins for data centers

Contoured Carbon®

Our patented carbon delivers 30%+ more capacitance per volume and drops into standard cell designs.

Lower total cost of ownership

Best value against other supercapacitors, plus more compute revenue from the same grid connection.

Best-in-class longevity

The metric that matters for high-cycle AI and on-site grid-forming duty. Years of service where batteries last months.

Made in the U.S.A.

The only domestic producer of both activated carbon and supercapacitors, and a growing requirement for AI and data center buyers.

Taming AI power whiplash, from milliseconds to years

GPU clusters swing their power draw within milliseconds. That whiplash breaks behind-the-meter gas plants, damages transformers and wears battery systems out in months. florrent supercapacitors are built for exactly this duty cycle.

100x

Power density of batteries

Instantaneous response delivers electricity at one hundred times the power density of traditional energy storage.

1000x

Cycle life of batteries

A different chemistry than Li-ion handles the high-frequency whiplash of AI processes for years instead of months.

$150B

Yearly cost of U.S. power outages

Outages cost American businesses an estimated $150 billion a year, according to the U.S. Department of Energy. Supercaps shave the spikes before they spread.

The challenge

The grid has heartburn. Supercaps are the cure.

Power pollution is real, and now it's regulated

AI data centers are driving U.S. electricity demand, with their grid share forecast to triple to 12% by 2030. Rapid power swings create “power pollution,” degrading grid quality and raising rates. Proposed NERC, FERC, and ERCOT rules would require large loads to limit these impacts, making grid citizenship a condition of interconnection.

Burst-mode power, built in America

florrent’s supercaps smooth AI power spikes, delivering burst-mode power to stabilize grids. AI market leaders already include supercapacitors in their data center reference designs.

Through power,
we empower

We’re on a mission to prove that a sustainability-focused deeptech company can succeed financially while not compromising on ambitious social and environmental impact goals.

Impact

Join the team

At florrent, we are passionate about bringing the benefits of a decarbonized future to everyone. If our mission resonates as something you want to be a part of, we want to hear about it! Check out our careers page to learn about our current openings.

Careers

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