January 2014

Uni.System™,A Breakthrough

Vanadium Flow Batteryfor Grid-Scale Applications

©2014 UniEnergy Technologies, LLC. All rights reserved. 2

UET’s Breakthrough Vanadium Flow Battery

New electrolyte originating at Pacific Northwest National Laboratory (PNNL), now commercialized with significantly improved stability and nearly doubled energy density

Large-scale battery stacks, with 7 years of field deployments and sustainably operable at 2X power density

Much wider temperature and other allowable operation conditions, with improved reliability and efficiency

State-of-art controls, improving performance and minimizing maintenance

Highly integrated, modular and scalable system packaging

3

UET’s Field-Rugged Storage Product: 125kWAC;400kWh

Factory integrationprecision assembly & QC

Excellent safetyno thermal runaway

Temperature agnostic-40 °C to +50 °C

SOC agnostic

full capacity access

Plug & playrapid deployment

97% availabilityno stripping etc. required

20-year design lifeUnlimited cycles

100% recyclable

disposal contract included

©2014 UniEnergy Technologies, LLC. All rights reserved.

©2014 UniEnergy Technologies, LLC. All rights reserved. 4

UET’s Modular Uni.System™, 1MWAC

Systems scalable to multiple MW’s

Operational flexibility – 0.8ms Battery Response, 50ms System Response

Grid interconnection ready power interface and controls

Example: Substation Deployment – circa 2014

1 MW; 3.2 MWh

Uni.SystemTM

Multiple Uses T&D Support

Resource Services

Renewables Integration

Utility Substation 12kV Interconnect

5 ©2014 UniEnergy Technologies, LLC. All rights reserved.

©2014 UniEnergy Technologies, LLC. All rights reserved.

Representative Data for 1 MWAC Uni.System

6

Power (peak) 125 kWDC Container 1 MWAC Uni.System

Max energy capacity 460 kWhDC 3.2 MWhAC

Usable SOC 100% continuous

# of Stacks 3 24

Electrolyte 23m3 184m3

Response time Battery <10 ms System <100 ms

DC Efficiency 75 – 80%DC 75 – 80%DC

AC Efficiency - 65 –70%AC

Voltage 188 VDC4kV – 14kV3ɸAC ±10%

Voltage range 135 – 250 VDC 465-1000 VDC*

Power Factor - User-controlled : ±0.8

Design Life 20 years

Cycle Life unlimited cycles over the 20 year life

Ambient Temp -40°C to 50°C **

Envelope 8’W x 20’D x 9½’H

2.4 x 6.1 x 2.9 m

41’W x 52’D x 9½’H12.5 x 15.9 x 2.9 m

Footprint 160 ft2 [15m2] 2,132 ft2 [199m2]

Weight 39 t 340 t

* 465VDC minimum string voltage allows for a battery bypass within a string for n+1 redundancy

** active cooling option available for extended operation above 35°C ambient

©2014 UniEnergy Technologies, LLC. All rights reserved.

UET’s Global Technology Partners

7

RONGKE POWER

Battery Cell Stack Production

Electrolyte Production

New Electrolyte Development

©2014 UniEnergy Technologies, LLC. All rights reserved.

Field-Deployed Systems (Rongke Power)

8

# Year Projects Applications Power Energy

1 2008 China Electric Power Res. Inst. Distributed energy storage 100kW 200kWh

2 2008 Tibet Electric Energy Res. Inst. PV integration 5kW 50kWh

3 2009 Green Residential House Off grid storage 3.5kW 50kWh

4 2010 Green Office Building Off grid storage 60kW 300kWh

5 2010 EV Charging Station Peaking capacity, power quality 60kW 600kWh

6 2010 Telecom Station Remote Area Power Supply 3.5kW 54kWh

7 2011 Island Keeper House Off grid storage 10kW 200kWh

8 2011 Telecom Station Remote Area Power Supply 3.5kW 48kWh

9 2011 Ningxia Electric Power Group Off grid storage 3.5kW 14kWh

10 2012 Wind Turbine Supplier Smart microgrid storage 200kW 800kWh

11 2013 Wind Farm near Shenyang Wind smoothing 5MW 10MWh

12 2013 Wind Farm Wind smoothing 3MW 6MWh

TOTALS 8.5MW 18.3MWh

Rongke Power has built the most powerful and mature electrode stack in the world. Integration with UET’s electrolyte technology and packaging yields a highly compelling MW-class energy storage solution.

©2014 UniEnergy Technologies, LLC. All rights reserved. 9

Technology Comparison

TechnologyDegradation

%/yr

Footprint,System

levelSafety O&M

AC-AC Efficiency

Operational Flexibility

Scalability

UET Adv-VFB

0%+

2-3% of CAPEX

65-70%+ +

NaNiCl 5-8% 3-5% of CAPEX

60-75%

LION LFPHi end

4-6% 2-3% ofCAPEX

80-85%

LION LFPLow end

5-7% 3-4% of CAPEX

75-80%

LION LTO 2-4% 2-3% of CAPEX

85-90%

A-PbA 10-25% 3-6% of CAPEX

65-75%

NAS 6-10% 3-5% of CAPEX

60-75%

VFB 0% 3-5% of CAPEX

55-65%

Non-Flow systems add cells to scale power and energy capacity, with multiple-100K’s of cells for larger systems. UET scales to 10-100 MW, 20-400 MWh for transmission scale projects.