Regenerative Braking Using Flywheels

NY-BEST Energy Storage Technology ConferenceSyracuse, NY Oct. 20, 2016

Mandatory Disclaimer

This presentation does not constitute an offer of securities. Such an offer may only be made by means of a privateplacement memorandum.

The information contained in this summary is not complete and is only intended to provide prospective investorswith a basic understanding of the Company and its prospects.

Further, there are substantial risks associated with the Company’s ability to achieve its prospects, including,without limitation, changes in applicable laws, rules, and regulations, risks associated with the economicenvironment, the financing markets, and risks associated with the Company’s ability to execute on its businessplan.

2

Huge Problem:High Power Bursts

Waste energy, increase emissions, raise costs, and reduce system resiliency

Current “Solutions” are Inefficient

Short duration high power (megawatt+) power bursts must be managed

Helix Solution Substantially more efficient by design leading to lower costs, lower emissions, lower energy use and increased asset life

Helix Power Hardware Manages Utility Scale Power Bursts

3

The New York City Transit Project

New York MTA

Largest Consumer of Electricity in NYC

Expected savings up to 50% of energy used

Translates saving up to $115M annual savings

MTA Project IRR approximately 20%*

CO2 Avoided: 350,000 tons/year

*Note: Helix initial estimate based on projected total project system wide costs of $400M and full realized energy savings. Actual results may differ significantly from the forecast for a number of reasons, including failure to achieve any of the assumptions underlying such forecast.

Helix Power project supported by a NYSERDA award and DOE grant

10 cars ~ 1million lbs.

Braking Resistors

4

What is a flywheel?

Reliable and Proven Technology with Versatile Power Electronic System Integration

Diagram Source: InTech Open

Basic Flywheel Schematic Diagram

Simplicity:• Few parts• Many off-the-shelf or catalog parts• Interface to end user is on DC bus• Unique elements are patent protected

Input OutputDC Bus

High speed drive

Inverteror

ConverterRectifier

DC Bus OEM Interface

5

What is Regenerative Braking?

11/11/2015 6

Regen braking can recover 50% of a train’s energy

Using Power Surge Management With Regen Braking

Helix power management allows advanced 3rd rail voltage control

Regenerative braking schematic without power management

Advanced regenerative braking schematic with power burst management

Proprietary & Confidential

1 & 2 No savings

1, 2 &3 ~20% savings

1, 2, 3, 4 & 5 ~50% savings

Braking Resistors

7

Helix’ Flywheel Specification:

3’

7’

4’

Platform Spec Effect for User90 Sec Charge -Discharge @ 1MW

Matches train acceleration and braking times

20 year operating life Matches subway project time frame

1,000,000+ full charge/discharge cycles

Meets High Frequency Train stop schedule

Full Power –Continuous Operation

Operates 3.5 hours non-stop during rush hour

600 Volt DC Interface Fits requirements of metro subway line voltage

Power burst management specifications are very different from bulk storage 8

0 5 10 15 20 25Minutes

Pow

er -

MW

0

5

1

0

15

20

Power output is adjusted every ~4 seconds

The Problem: Highly Cyclic Power Bursts

Helix provides a better solution for controlling short duration high power fluctuations

Sample AGC signal

U.S. Utility Balancing Generator Fluctuations Industrial Process Fluctuations

Seconds

9

High Power Burst Markets IdentifiedMarket Market Size Value Proposition

Metro Transit10,000 Metro stations1flywheel per station

$10B(Launch)

Energy savings Peak power reduction T&D deferral China - 14 cities bigger than NYC

Industrial Large(Future)

Reduce capital cost Reduce O&M Peak power reduction

Renewables IntegrationDoD & Microgrids

MW+ UPS

Large(Future)

Reduce capital cost Reduce O&M Improve Resiliency Improved performance

Power burst management specifications are very similar in power markets10

Filed Patent Application

• Allows higher power while maintaining rotor and magnet temp limits

• Higher power density

• Allows continuous operation at high power

IP Pathway

World Coverage PCT patent in process11

Why Helix Power Is Exceptional

Huge unfilled initial market – Metro Train Regenerative Braking Excellent competitive position – Addresses 40C applications

• Other flywheels are too low in power, energy, or both• Batteries must run at least 10X oversized (Power/Energy) to meet life

and performance requirements• Capacitors are more expensive than flywheels to meet requirements

World-class flywheel team Patent filed on core innovation – others to followHuge markets of metro trains, renewables and industry fuels sustainability

12

Matt Lazarewicz, PresidentPhone: 781.718.7282 | Email: lazarewicz@helixpower.com

Greentown Labs, 38 Dane Street, Somerville, MA 02143