01 · What it does
When a data center drops off, the grid feels it
- A brief grid disturbance causes a voltage sag.
- To protect its servers, the data center switches to backup power.
- Hundreds of megawatts vanish from the grid in under a second, often at several sites at once.
- Grid frequency spikes and the grid has to rebalance, fast.
1,000+ MW of data center load lost within seconds in repeated events cited by NERC's Level 3 alert (May 2026).
AI training adds its own shocks: load swings of 30 to 50% in under a second.
The S2-1000 absorbs the shock
It sits on the data center's UPS power bus, between the grid and the servers, and responds in under 10 milliseconds.
- Rides through. Holds the power bus steady through a grid sag, so the UPS never switches to backup and the grid never loses the load.
- Absorbs sudden drops. When load falls away, it soaks up grid power and hands it back gradually. A cliff becomes a ramp.
- Smooths AI swings. Supplies the peaks and absorbs the troughs of AI training loads, so the grid sees a flat draw.
- Built for the new rules. Designed to support compliance with ERCOT's ride-through rule (NOGRR 282) and its proposed 10 MW / 5 s variation limit.
Simulated A sudden 60 MW job stop, as the grid sees it
02 · Product spotlight
S2-1000 Kinetic Stabilizer
One skid-mounted flywheel unit: 1 MW for 5 seconds, ready in under 10 ms. Deploy one per UPS block or data hall.
- Rated power
- 1 MW
- Response time
- <10 ms
- At full power
- 5 s
- Life, no capacity fade
- 20+ yr
| Rated discharge power | 1,000 kW |
|---|---|
| Duration at rated power | 5 s |
| Usable energy | 5 MJ |
| Round-trip efficiency | 85% |
| Response time | <10 ms, detection to power |
|---|---|
| Output voltage | 480 V, 3-phase |
| Connection | UPS DC bus (recommended) or 480 V AC |
| Rotor speed | 3,600 to 1,800 rpm, full to discharged |
|---|---|
| Bearings | Magnetic, rotor under vacuum |
| Design life | 20+ years, no capacity fade |
| Footprint | 10 × 35 ft, skid + flywheel enclosure |
|---|---|
| Installed weight | 10 tons |
| Standby power | 15 kW |
Production unit ratings. Qualification of the first unit to the full 1 MW / 5 s rating is in progress.
Submit an inquiry03 · Real hardware, real tests
Built and tested in Houston
The first commercial S2-1000 is built and running at our Houston facility.
Test results
Measured
Grid-loss test: the load bus barely moved
We opened the utility breaker. The 480 V load bus dipped just 1.9% (to 474 V) and settled in about 0.1 s. The flywheel then carried the load on its own for 115 s at test load.
Measured
Full-system discharge: ~750 kW peak
The rotor ran from 3,600 rpm down to a stop and released ~6.6 MJ, in line with 5 MJ usable in the normal operating range. Qualification to the full 1 MW / 5 s rating is in progress.
Measured
Absorbing power: ~494 kW in
The drive pulled ~494 kW from the grid into the flywheel as the rotor sped up. Power flows both ways, which is what absorbing a sudden load drop takes.
Power (kW) Shaft speed (rpm)
16 Sep 2026: power stepped to a ~494 kW peak while shaft speed rose to ~2,133 rpm. Partial power, single unit.
Milestones
- Full 3,600 RPM reached on magnetic bearings under vacuum
- Destructive test passed: the containment safely captures all failure energy
- Magnetic offload carries most of the rotor's weight
04 · Why Revterra
Simple physics, built to last
- Energy in a spinning steel rotor: no electrochemical wear, so cycling doesn't use it up
- No flammable chemistry: no electrolyte, no thermal runaway
- Full rated power at any cycling rate, where batteries and supercapacitors wear or fade
- Made in Houston, Texas, with a US supply chain ready for 100s of MW
Recognition
- Gold Edison Award, Data Center & Power Systems Optimization (2025)
- Top 10 Scaling Compute solution, Energy Tech Challengers (2025)
- Grand Prize, COP28 Decarbonization Technology Challenge (2023)
- Best in Category, Energy Storage, CERAWeek (2022)
05 · Contact
Talk to Ben
Ben Jawdat, PhD
Founder & CEO, Revterra Corporation
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