The Best Way to Generate Electricity - B. attery C.H.G.S. solar Power

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1 / B attery C harging Systems / Welding Technology / Solar Electronics /The Fronius way toenergy self-sufficiency.

2 FOUR STEPS TOWARDS THE FUTURE OF SUSTAINABLE ENERGY USAGE For years, Fronius has been pursuing its goal of switching to renewable energy and achieving ahigh level ofenergy self-sufficiency. With the sun as the supplier, we have an inexhaustible source of solar energy at our disposal. Fronius has avision of making this clean solar power available not only during periods of sunshine,but also at night or in the winter. Using intelligent energy management, short and long-term storage and emergency power supplies, wedeliver solutions that sustainably protect the earth s natural resources.

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4 Scenario 1 ENERGY MANAGEMENT /Solar inverters can communicate with smart meters, giving users areal-time comparison between their electricity consumption and their own production of PV electricity. C onsumer loads (e.g. electric car,washing machine,...) are automatically controlled and can be switched on or off depending on how much electricity is being supplied by the PV installation.

5 Scenario 2: Midday Evening PV SYSTEM WITH SHORT-TERM ENERGY STORAGE /Inverters are coupled with short-term energy storage units that temporarily store surplus solar power. This allows electricity produced during the day tobemade available at night.

6 Scenario 3 EMERGENCY POWER INVERTER /Inthe event of apower failure, the short-term energy storage unit can be used to provide power. The household is disconnected from the grid and the emergency power inverter switches to astand-alone operation.

7 Scenario 4: Summer Winter FRONIUS ENERGY CELL LONG-TERM ENERGY STORAGE /The Fronius Energy C ell is used for the long-term transfer of energy. Surplus PV current from the summer can be stored as hydrogen and converted back to electricity during the winter.

8 PAVING THE WAY TO ENERGY AUTONOMY /With the development of the Fronius Energy C ell, Fronius is paving the way for a transition from a centralised to a decentralised supply of energy. This means increasing the private consumption of energy generated from PV sources and to a large extent achieving energy autonomy. /Depending on the availability of solar energy, Fronius distinguishes between direct consumption, short-term and long-term storage. In the case of the long-term storage of PV current, a heat buffer store also helps meet local heating needs.

9 1 Direct consumption 2 Electrical consumers Short-term energy storage unit 3 Long-term energy storage unit 4 H 2 H Heat consumers, hot water,heating Short-term energy storage unit: / B attery /Storage period: hours,days / C apacity size: 10 kwh Long-term energy storage unit: /Hydrogen-gas tanks /Storage period: weeks,months / C apacity size: 1,000 kwh Energy flowchart: 1 Photovoltaic generator, 2 PV inverter, 3 B attery, 4 Fronius Energy C ell as energy converter, 5 Heat buffer store, 6 Hydrogen-gas tanks

10 DIRECT CONSUMPTION /Intelligent energy management controls the immediate supply of PV energy directly to consumers,asitisgenerated. SHORT-TERM ENERGY STORAGE UNIT / A ny surplus of solar power produced during the dayisstored in batteries (e.g.lead or lithium batteries). A tnight or during periods of little or no sunlight during the day, stored PV energy can be supplied to consumers as required.

11 LONG-TERM ENERGY STORAGE UNIT / Long-term storage involves transferring PV energy generated during sunny periods for use during periods of low sun. Surplus solar power from the summer is saved over several months in preparation for the winter. /The Fronius Energy C ell generates hydrogen via electrolysis,which isthen stored at high pressure in gas tanks -this long-term storage is compact and does not result in any losses. The reversal process -the fuel cell -can generate electrical energy from hydrogen extremely efficiently when required. The waste heat produced from both processes is stored in abuffer and used to meet local heating needs.the result is compact, highly-efficient long-term energy storage. /Energy generated decentrally from PV systems is therefore also extremely suitable for decentralised use.

12 / B attery C harging Systems /Welding Technology /Solar Electronics WE HAVE THREE DIVISIONS AND ONE PASSION: SHIFTING THE LIMITS. /Whether B attery C harging Systems, Welding Technology or Solar Electronics -our goal is clearly defined: to be the technology and quality leader. With more than 3,000 employees worldwide, weshift the limits of what s possible -our 650 active patents are testimony tothis. While others progress step by step, weinnovate in leaps and bounds. Further information about all Fronius products and our global sales partners and representatives can be found at Fronius International GmbH Froniusplatz Wels A ustria PV@fronius.com 40,0006,3178,EN v