1. Segen Installer Conference, Feb 23rd 2012

2. Agenda Company Overview
Conventional Solar Grid Systems Vs Enecsys Product offering
Architecture and Topology
Design & Safety Advantages of Enecsys Micro inverters
Installation of Enecsys PV Systems
Key Benefits (Customer, Installer& Technology and Local Economy)
Questions

3. Company Presentation: Enecsys Ltd.
2003: Finalist in European Business Competition and finalist London Business School social venture business competition; Enecsys formed as Spin out of Cambridge University.
2004: Cambridge Enterprise Investment, DTI R&D grant
2007: Secured investment for development & pre-market testing
2008: CE and G83 Certification of Engineering Sample
2009: Funding $15M Series A received for commercialization of Enecsys Inverters
June 2010: Product Launched at Intersolar Munich
May 2011 Enecsys secures £25 million ($41 million) investment to accelerate its growth plan
Aug Enecsys appoint Mike Fister as CEO (This is a world class person, as he was one of the top executives of INTEL, and then CEO of cadence design systems (Revenues of $1bn)
Institutional Investors:

4. Conventional Solar Grid Connected Systems
Conventional solar systems have:
Modules attached in series strings
One large string inverter
High Voltage DC
Visibility at system level only
Focus of industry has been on:
Inverter efficiency
Low cost per Peak Watt
Experience shows this to be a sub-optimal solution in real world conditions
Inverters must be replaced at least once in lifetime of modules: 2X cost
Harvested energy below expectation due to MPPT difficulty & module performance variation:
Aging, dust, reflections, shadows
Requires nearly ideal conditions for high performance
Expensive to plan, install and maintain

5. Enecsys Solar System Architecture
AC- Module
Enecsys modular micro-inverter based solar systems have significant advantages vs. conventional DC string systems:
Maximised harvested energy: shading & defect immunity, reduced cabling losses, and power optimisation (MPPT) for each module individually
No single point of failure
Safer system as high voltage DC is eliminated: simple, standardized, cost effective installation with no specialist DC installers
System management and performance enhanced through communication down to the individual module level
Enecsys Enables a Simpler Solar System Architecture with Superior Performance and Lower Cost 5 5

6. Unique Patented Energy Control System
Low life unreliable components used in conventional inverters are:
Electrolytic capacitors and opto-couplers
Premium industrial electrolytic capacitor only have an operating lifetime of 7,000hrs at 105C
Typical energy storage requirements are very high compared to Thin Film Capacitors
Typical life of conventional inverter is ~10 years
Purpose of the Enecsys Energy Control Technique:
Removal of low life time components
Improved stability and maximum power point tracking
Typical life of Enecsys Micro-Inverter is >25 years
Thin film capacitors have a lifetime of 30,000 hours at 105C with significant increase in reliability
The Enecsys inverter using only thin film capacitors

7. Design Advantages of Enecsys Micro Inverters
Enecsys Micro-inverters have no distribution or concentration of high DC voltage and high
current
Arcing caused through the distribution of high DC voltage is no longer a concern
DC wiring is only in the vicinity of the module
Maximum DC voltage is 60V as opposed to 1000V
Micro-inverters can be used over non-grounded DC systems
Thermal cut out at 110 degrees C – providing local isolation
Wiring is intrinsically safe > total circuit current capacity
Micro-inverters are compliant with the changes in NEC 2011
Electronic inverters secured in fire approved enclosures
Removal of the utility AC power results in the system automatically shutting down

8. Installation of Enecsys PV System
General Information:
Installation Diagram
Wiring Example and Limitation
Survey
Planning
Installation:
Installation Process
1st Step: Installation of the Communication System
2nd Step: Installation of the Enecsys Micro-inverters
3rd Step: Connexion of the Enecsys Micro-inverters
4th Step: Check Communication Link
5th Step: Set Live Monitoring System
Monitoring Access
User Monitoring
Installer Monitoring

9. Site Survey
Recommendations to keep in mind when surveying, planning and preparing to install Enecsys solar micro-inverter system:
Type of roof: Metal or foil backed insulation will obstruct communication and may require a double repeater
Availability of a broadband internet connection
The internet router contains an available network socket with a spare power supply socket nearby
What is the distance from Enecsys gateway & Enecsys Micro-inverters (do the premise need repeater(s)?).
There is a spare power socket for repeater when needed (Between Enecsys gateway & Enecsys Micro-inverters) in case communication need to be amplified.
EDIT..need distance of g-r-dr-1st inverter

10. Equipment Selection
Ensure you have selected the appropriate Module for you application and the corresponding inverter type.
Select the Module – Enecsys Inverter combination for your application
Ensure that you understand the mounting methodology for attaching the inverters to the racking system and have procured all the hardware to install the micro-inverter onto your mounting structure (M-8 SS) bolts including the PV-JB to AC system transitioning hardware.
Plan the positions of the micro inverters according to the roof layout, i.e. position of the mounting structure and the junction box of the module.
Plan the AC cabling to connect the micro inverters.

11. Simplicity of Design and Installation
Use all available roof space eliminates desing headaches
Use with any combination or quantity of Heliene Modules
No single point of failure
No DC BoS components such as Combiner Boxes, Switches and fuses
BoS and Labor saving up to 15% even more in the design stage
System can be easily expanded
System is very safe: no high DC voltage, no risk of electrical arc
Inverter lifetime
Savings in design can exceed 50% over conventional String inverters, especially in the design and intial layout of modules.

12. Installation Planning: No Specific Tools
No Design Software need to configure modules vs. string inverter
No need to group modules
No crimping tools needed to build DC Home Run Connectors anymore
No need for Combiner Box(s) installation
No specific tools necessary with Enecsys PV system
Stop here for Lunch...

13. Installation Diagram Enecsys Micro Inverter Distribution Block
PV Module
Grid Connect Cable
Enecsys Repeater
Enecsys Gateway
Enecsys Monitoring

14. Wiring Example All Work should be performed by qualified personnel.
Limit of Inverters per AC branch
The maximum number of inverters in each AC branch circuit will depend on the Inverters Maximum Output Current and the maximum allowable AC current of that branch.
Each branch circuit installed must have overcurrent protection and be installed in accordance with local and National codes and regulations.
Start your AC bus with distribution unit to spread the load, and avoid circle loop.
All Work should be performed by qualified personnel.

15. Standard Electrical AC system design and installation
AC Branch Circuits
POCCAC
Main
Electrical Grid
PV System Junction Box AC
System
Standard Electrical AC system design and installation
Home Use
N # of AC Electrical Branches

16. Wiring Example Exercise
Determine the Number of Inverters, Distribution Blocks,
Buss Extension Cables and Buss Grid Connection Cables
Used in this wiring example.
Can you optimize the design?

17. Install Enecsys Micro-inverters
Easy to install on almost any mounting structure with the handle of the Micro Inverter
Layout and install
Record the position and serial number of each inverter

18. Connection of the Enecsys Micro Inverters
The Push-Clip System is Plug & Play
Connect the Inverters
Attach End Caps
Secure the AC cabling to the mounting structure
Connect the Modules to the Inverters
Connect the branch circuit to the POCC

19. Check Communication Link
Check signal strength
Add Repeater(s) as needed
Verify all Inverters are reporting and Gateway has a √ sign
Verify Internet connection is established

20. Monitoring Monitoring access: User Monitoring: Installer Monitoring:
User Monitoring:
Quick View
System View
Can only see their system
Cannot make any modifications
Installer Monitoring:
Live Installation
Create New Installation
Can add installations (user accounts)
Can monitor multiple user accounts

21. Key Benefits of the Enecsys Micro-Inverter System
Skills present within local labour workforce
Minimal investment in new training requirements
Plug & Play - lower installed cost
Lifetime equivalent to module – 25 years
Product Warranty 20 years
Higher harvested energy in ‘real world’
High performance system monitoring
Opens up large new markets,
Vision: 50% of Residential market will be Enecsys Micro Inverters – Sub 4KW
Generating opportunities for small business enterprises
Simplification of supply chain management

22. Enecsys Company Video

23. Thank you for your attention