Power One UK Q1 2012

Confidential 1 1 Company Key Figures  Design, Manufacturing, Sales and Service Centres in Asia, Europe, and North America  R&D and Manufacturing excellence in Tuscany, Italy  Global #2 supplier of PV inverters  2011 revenue: £700M –Inverters delivered: 3.1GW  Employees: 3,470  2012 capacity: over 6GW  UK Technical support and Service

Confidential 2 2 Worldwide presence RE high level assemblyCorporate headquarters Sales & service locations Camarillo, CA Ontario, Canada Phoenix, AZ Boston, MA France Spain UK Italy Australia Hong Kong Shenzhen Germany Global Coverage Singapore R&D excellence Dubai

Confidential 33 Current Portfolio

Confidential 4 4 PV Product Portfolio STRING < 30 kW CENTRAL 50 kW – 1MW TURNKEY SOLUTIONS 440 kW – 1320 kW

Confidential 5 5 Three Phase Single Phase PV Product Portofolio - String Inverters UNO-2.0-I UNO-2.5-I PVI-2000 PVI-3.0-TL -OUTD PVI-3.6-TL-OUTD PVI-4.2-TL- OUTD PVI-3.8-I-OUTD PVI-4.6-I-OUTD EU - APAC Market PVI-5000-OUTD PVI-6000-OUTD 0 kW 20 kW10 kW 8 kW 30kW 7 kW2 kW3 kW4 kW5 kW6 kW TL 8 kW7 kW2 kW3 kW4 kW5 kW6 kW Isolated UK Approval G83/1 G59/2 UNO 2.0 and 2.5 from April 2012 PVI-3.6-TL-OUTD – selectable for either G83/1 or G59/2 at installation 20 kW10 kW30kW PVI-10.0-TL PVI-12.5-TL PVI-10.0/12.0-I TRIO-20.0-TL TRIO-27.6-TL

Confidential 6 6 Dual input MPPT (>2kW PVI) to process two strings independently so maximizing the energy being harvested. Wide input voltage range allows very short strings to long strings. The wide input range also allows the inverter to start generating energy from the solar panels very early on the morning to late in the day. Maximum Power Point Tracking (MPPT) finds the optimum working point to maximize the energy harvesting. Key Features for UK Residential Market Benefits Cater for different aspects (ie East and West) Different tilt angles Partial shadowing (chimney, trees) Different solar panel brands, ie; MPPT 1 = 10 x 190W Brand X MPPT 2 = 5 x 235W Brand Y

Confidential 7 7 Dual MPPT with High-Speed algorithm Maximizing energy harvesting Different MPPs to be managed separately for a improved energy harvesting Equal or independent input loads for unique flexibility in designing your PV installation High Dynamic Efficiency: less than 2 seconds to find the MPP MPPT Scanning Function Real Pmax False Targets V min Mpp1Mpp2 Running a preliminary scanover the input voltage range considerably increases the MPPT algortithm’s effectiveness. Increase yield performance in partially shaded scenarios.

Confidential 8 8 PV PLANT Details: 2.88kWp, configured for dual Input Power-One PVI-3.0-OUTD Inverter Photos taken January 2010 Time: 1 p.m. Pin1≈150W, Pin2≈190W The inverter is restarted. The new production levels are: Pin1≈843W, Pin2≈793W Demonstrating the benefit of MPPT Scan

Confidential 9 9 PV PLANT Details: 2.88kWp, configured for dual Input Power-One PVI-3.0-OUTD Inverter Photos taken January 2010 Time: 3 pm. Pin1≈110W, Pin2≈170W The inverter is restarted. The new production levels are: Pin1≈743W, Pin2≈881W Demonstrating the benefit of MPPT Scan

Confidential 10 Confidential 10 Extremely wide voltage range High efficiency η EU ~96% MPPT – Accurate (99.8%) and fast (~1sec) G83 certification IP21 Enclosure – Conformal coating of internal boards to prevent moisture ingress Only 7.5kg! AURORA Uno - PVI-2000

Confidential 11 Confidential 11 UNO-2.0/2.5-I-OUTD Compact Inverter for Residential Installations Front cover opens to expose connection terminals High frequency isolated unit Extremely wide voltage range High efficiency η EU ~96% MPPT – Accurate (99.8%) and fast (~1sec) G83 certification IP65 Enclosure – Natural cooling, no fans Optional lockable DC Isolator Only 17.5kg! Available from late February 2012

Confidential 12 Confidential 12 2 independent MPPTs for 3kW+ Extremely wide voltage range Vdc High efficiency - η max 96.8% - η EU 96% + flat efficiency range – insensitive to the changes in input and load voltage Immunity to voltage dips and micro grid brown outs MPPT – Accurate (99.8%) and fast (~1sec) G83/1 or G59/2 certification for PVI3.6 Partial Shade management with MPPT scan function Reliability – IP65 housing, no fans for cooling. Conformally coated PCBS to avoid condensation Simple to install. – Optional DC switch, configurable for dual MPPT on site AURORA Uno - PVI-3.0/3.6/4.2-OUTD

Confidential 13 DUAL MPPT Strings at different tilt angles. Non uniform orientation. Total module count is odd. Subjected to different shadowing. Different module types. SINGLE MPPT One string or array exceed the max current/power of the single MPPT. PV array is uniform and for cost saving a single DC cable collects the power from 2 or more parallel connected strings. Dual or Single MPPT Configuration? INVERTER Grid SINGLE MPPT MPPT MPPT1 MPPT2 INVERTER Grid DUAL MPPT

Confidential 14 Confidential 14 Simple Installation and configuration MPPT1 MPPT2 Links fitted for Dual operation Switch set for mode Simple configuration for Dual or Single MPPT

Confidential 15 Confidential 15 Electrolyte capacitor -Free  10 years base warranty!! Wide operating temperature range: full power up to 55°C 100% IP65 enclosure and true free-convection cooling system (no external fan) Dual independent MPPT’s input trackers Wide input voltage range: Vdc to allow easy configuration with all module’s technologies Delivers 10% extra output power under most operating conditions High and flat efficiency curve: to ensure consistent and stable performance across the whole input voltage and output power range. 38kg and compact design AURORA TRIO - PVI-10/12.5-OUTD 3Phase String Inverter for Commercial Applications 10 year warranty Electrolyte-Free

Confidential 16 Confidential 16 AURORA TRIO-20.0/27.6-TL-OUTD 3Phase String Inverter for Commercial Applications 20kW and 27.6kW String Inverters Detachable wiring box (3 options) for simple installation and field replacement. High efficiency - η max 98.2% - η EU 98% 100% IP65 enclosure and true free-convection cooling system (no external fan) Dual independent MPPT’s input trackers Ultra-wide input voltage range: Vdc to allow easy configuration with all module’s technologies Delivers 10% extra output power under most operating conditions 10 year warranty Electrolyte-Free

Confidential 17 Confidential Large TRIO: the wiring box: what’s inside? Comminucation board with RS485 gate, memory expansion slot, SD Card Single String monitoring (current and fuses reading) DC (Weidmuller) connectors: 27.6kW: 5 couples/MPPT 20.0kW: 4 couples/MPPT Class II Input Overvoltage protections Class II Output Overvoltage protections AC connection points DC+AC Switch 3 wiring box options – SX2 Shown

Confidential 18 Confidential 50kWp Application example TRIO TRIO 20.0 Installed 50.16kWp Configured for 6 strings x 19 (114 panels) + 5 strings x 19 (95 panels)

Confidential 19 Confidential 19 Monitoring - PVI-Desktop Monitoring Systems EU - APAC Market Residential Commercial PVI-AEC-EVO PVI-DESKTOP Easy-to-use: touch screen display Connections: ‘wired' (direct RS485 link to inverters) or 'wireless' (with PVI-RADIOMODULE installed on each inverter) with range of 300mt in open space Monitor capability: up to 6 string-inverters can be monitored simultaneously Connectivity: USB (default) or Bluetooth (optional) for data download and firmware updates using local PC Data storage: compact Flash 2GB included Upgrade capability: FW upgrade through Aurora Communicator SW with automatic download of new FW release from the Power- One server Rechargeable lithium battery (provided with battery charger) Real time yield Daily Statistics30 day Statistics

Confidential 20 Confidential 20 Monitoring - PVI-AEC-EVO Monitoring Systems EU - APAC Market Residential Commercial PVI-AEC-EVO PVI-DESKTOP Data acquisition from multiple inverter Complete plant control Modular/Scalable Easy to install and configure Multiple Analog inputs for local ambient parameter data acquisition using external sensors Web portal service included

Confidential 21 Web based Aurora designer allowing the verification of the correctness of the configuration of the Solar panel system to be coupled with the inverter. Aurora String Designer Tool

Confidential 22 Confidential 22 UK Based Technical Support, Service and Training UK Service Hotline Training programs Dimensioning Assistance Online installation and designing videos Online design tool and resources Field service and advance string swap

Confidential 23 Confidential 23 Key Features of the Aurora Inverters Dual MPPT on all Inverters above 2KW- this ‘two in one’ design means you can have different aspect strings optimally managed by a single Inverter!! Widest DC input range of Inverters on the market and so maximizing PV harvesting time Very Efficient – up to 96% Euro efficiency ( Max 96.8%). Best performing MPPT algorithm which tracks changes in 1.3 secs to 99.5% Optimum efficiency is seen in the mid voltage range – which is most typically seen in string designs. 10 year warranty with Trio 3 phase Light weight makes installation considerably easier.