MST Proprietary – Company Confidential

10 Oppenheimer St. Rehovot Science Park, Rehovot 76701. Israel

Office: +972-8-9314606 Website: www. mst-ren.com

MST Proprietary – Company Confidential

Presentation to Jerusalem Conference 2013

MST Proprietary – Company Confidential

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The CPV WakeupThe CPV Wakeup

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CPV Power tracker

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MST Proprietary – Company Confidential

The Technology – Power blockThe Technology – Power block

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CPV is the technology that uses MJ (multi junction) solar cells

that were originally developed for space application and concentrated light to reduce the size of the solar cells and thus reduce cost.

The industrial MJ solar cells have today an efficiency of 40% and will reach in about 3 years an efficiency of 45%. In the more distant future the MJ cells will reach an efficiency of 50%.

The increase in efficiency of the cells is of great interest because it reduces proportionally the cost of the CPV system.

What is CPVWhat is CPV

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The light concentration of present systems varies between 500 and 1000

suns. The size of the lenses varies from 30x30 cm to 5x5 cm.

The high concentration requires accurate tracking of the sun, normally better than 0.1 deg.

The tracker is a critical element in the CPV system, because degradation of tracking will reduce strongly the efficiency of the system.

The tracker becomes also a significant cost item and its MTBF is critical.

(Mean Time Between Failures)

What is CPVWhat is CPV

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CPV TechnologyCPV Technology

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The following are the basics of CPV (Concentrated PV)Reducing the cell area by replacing expensive semiconductor material with low cost GLASS lenses. Employing highly efficient solar cells instead of regular Si solar cells (40% instead of 20%).

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The TechnologyThe Technology – Power Element

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Refractive secondary optics.Novel optical design which yields a >1º acceptance angle. Special optical bonding.Integrated solar cell receiver (bypass diode and terminals).

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Light energy is comprised of two elements: DNI (Direct Normal

Irradiation) and diffusive.

The resource available to CPV is only the DNI.

The DNI contains about 80% of the available light energy.

However, because CPV tracks the sun, it captures all the DNI available, in contrast to PV fixed systems that capture only part of it.

Resource available to CPVResource available to CPV

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Silicon PV captures only the normal component of the DNI and the diffusive light.

Thus, about 25%-30% of the DNI is lost for fixed latitude tilted silicon PV systems because of cosine losses.

Resource available to PVResource available to PV

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There are two other major parameters that make a difference

in efficiency between silicon and MJ/CPV systems:

Temperature and Aging

The typical efficiency reduction of Silicon due to cell temperature is 0.38%/degK.

The typical efficiency loss figure for MJ cells is 0.06%/degK

The efficiency decay over time is comparable

Other differences: CPV vs PVOther differences: CPV vs PV

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From above it is obvious that the CPV has advantage over Fixed Tilt PV in hot areas, and due to the fact that CPV is tracking the sun

The following are 5 typical locations where CPV has advantage over Fixed Tilt PV.

The resource information is from NASA Data Base that collected the data over a period of 22 years.

CPV advantage over PVCPV advantage over PV

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DimonaDimona

Dimona Radiation Monthly Production (kwh/msq/month)

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250.00

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MonthCPV PV Tilted

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DimonaDimonaDimona Monthly Excess Energy Produced by CPV (CPV/PV-1)

0.0%

20.0%

40.0%

60.0%

80.0%

100.0%

120.0%

140.0%

160.0%

1 2 3 4 5 6 7 8 9 10 11 12

MonthTPV/PV Ratio Yearly average

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DeAar, South AfricaDeAar, South Africa

DeAar Radiation Monthly Production (kwh/msq/month)

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50.00

100.00

150.00

200.00

250.00

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MonthCPV PV Tilted

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DeAar, South AfricaDeAar, South Africa

DeAar Monthly Excess Energy Produced by CPV (CPV/PV-1)

0.0%

10.0%

20.0%

30.0%

40.0%

50.0%

60.0%

70.0%

80.0%

90.0%

100.0%

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120.0%

130.0%

140.0%

1 2 3 4 5 6 7 8 9 10 11 12

MonthCPV/PV Ratio Yearly average

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Tibet PlateauTibet PlateauTibet Plateau Radiation Monthly Production (kwh/msq/month)

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150.00

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MonthCPV PV Tilted

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Tibet PlateauTibet PlateauTibet Plateau Monthly Excess Energy Produced by CPV (CPV/PV-1)

80.0%

90.0%

100.0%

110.0%

120.0%

130.0%

140.0%

150.0%

1 2 3 4 5 6 7 8 9 10 11 12

MonthCPV/PV Ratio Yearly average

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Hohhot, Inner Mongolia, ChinaHohhot, Inner Mongolia, China

Hohhot Radiation Monthly Production (kwh/msq/month)

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50.00

100.00

150.00

200.00

250.00

1 2 3 4 5 6 7 8 9 10 11 12

MonthCPV PV Tilted

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Hohhot, Inner Mongolia, ChinaHohhot, Inner Mongolia, China

Hohhot Monthly Excess Energy Produced by CPV (CPV/PV-1)

80.0%

90.0%

100.0%

110.0%

120.0%

130.0%

140.0%

150.0%

1 2 3 4 5 6 7 8 9 10 11 12

MonthCPV/PV Ratio Yearly average

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Alice Springs. AustraliaAlice Springs. Australia

TPV/PV =125.4%

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Summing UpSumming UpFor a DNI of about 2200 kwh/msq/y

the CPV produced energy has an advantage of 20%-23.6%

For a DNI of about 2600 kwh/msq/y

the CPV produced energy has an advantage of about 26%

For a DNI of about 2700 kwh/msq/y

the CPV produced energy has an advantage of about 30%.

The higher the DNI, the larger the advantage of CPV

over Fixed Tilt PV

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Global Solar IrradianceGlobal Solar Irradiance

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Global Solar IrradianceGlobal Solar Irradiance

The following regions are the most favorable for CPV:

South West US, North Mexico, Chile, North Argentina, South Africa, Tibet Plateau, Inner Mongolia, Australia, North Africa Middle East countries including Israel.

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CPV vs Tilted PV Land UseCPV vs Tilted PV Land Use

CPV requires an area of 8,000msq/MW up to 12,000msq/MW.Tilted PV requires 20,000 to 40,000 msq/MW CSP (Thermal Concentrating systems) requires 35,000 msq/MW.

CPV can be installed on hilly areas because it is mounted on a pole. PV requires flat areas.

Land is always a rare commodity, and should be used sparingly.For large installations at the level of a country, a low land area

requirement is a major benefit.

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Additional advantages of CPV Additional advantages of CPV

Dual use of land

Lower soiling

Higher productivity. CPV produces 2.6 times more energy per unit land area than Fixed Tilt PV

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Cost effectiveness of CPV Cost effectiveness of CPV

The CPV systems have reached the stage that large turnkey solar plants can be sold at a price of $2500/KW.

High quality fixed tilt PV systems are now sold for a price of about $2000/KW. Having an advantage of 20%-30%, the CPV installations are as cost effective as the PV systems.

Taking into account the additional advantages of the CPV, it becomes the system of choice in desert areas and high altitude

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Cost effectiveness of CPV Cost effectiveness of CPV

Moreover, as the efficiency of MJ solar cells increases, the cost and therefore the price of CPV installations will reduce proportionally. In addition, as the installation capacity of CPV increases, the price of components will decrease as well.

In view of above, we can easily anticipate a reduction of 25% in CPV price in the next 5 years to a price below $2000/KW. At that stage CPV will be the most cost effective solar system technology to install in the relevant territories.

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The CPV demandThe CPV demand

The customers learned to appreciate the CPV advantages, and there is a raising demand world wide to this technology.

The status is that there is a handful of companies that can supply utility size systems.

Therefore, CPV systems are in high demand and this is growing

In view of the vast land areas that comply with CPV capability, this demand will be growing

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The MST CPV Business ModelThe MST CPV Business Model

MST has anticipated the status of CPV and its demand and followed the following steps:

Developed a high efficiency low cost system Developed a reliable, low cost, low maintenance cost, high accuracy tracker that supports the system.Developed with Kuka and Ortech a Production Line that allows implementing the technology by anyone who desires acquiring it.

The Production Line capacity is 75MW/year with 3 shifts.

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Technology licensing ContentTechnology licensing Content

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Lines hardware and software.

Installation and supervision.

Engineering support.

Ramp up.

Training.

Documentation.

Technology upgrades.

Financing.

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The MST CPV Business ModelThe MST CPV Business Model

MST offers its customers complete packages as follows:

Licensing the CPV technologyTurnkey installation of Production Lines to build solar plants near the area of deploymentTraining of personnel to operate the Production Lines.

MST is the only company that proposes such packages.