affordable battery storage - australian energy storage ... · inverter dc load center ac load ......
TRANSCRIPT
Affordable Battery Storage: Challenges & Opportunities for
the Evolving Grid
Keera Single
Strategic Account Manager
June 42015
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 3
Enphase from Start-Up to #1
Enphase listed on
NASDAQ under
symbol ENPH
First microinverter
system introduced
7.2 million units
shipped, representing
over 1GW Founded by
Raghu Belur and
Martin Fornage
in California
1 million units shipped,
Enphase expands globally
Fourth-generation
technology introduced
Fifth-generation
technology announced
2006 2007 2008 ~ 2011 2012 2013 2014
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 9
Centralised Architecture Solution
Off-Grid
Inverter
DC
Load
Center
AC
Load
Center
Load Center
Utility
Meter
Load
String
Inverter
Charge
Controller
Series/Parallel PV Array Series/Parallel PV Array
Series/Parallel Battery Bank
48 VDC/60A
Load Controllers
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 10
Distributed Architecture Solution
Load
Load Controllers
Load Center
Utility Meter
Distributed PV (AC Module)
PV System
Managed by Enlighten
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 11
Distributed Architecture Solution
Engage Cable
Load
Load Controllers
Load Center
Utility Meter
Distributed PV (AC Module) and Distributed Storage (AC Battery)
Managed by Enlighten
Energy Storage System
PV System
Managed by Enlighten
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 14
Storage as an app
Platform for energy system
• Solar is an app
• Storage is an app
• Zero Export is an app
• Capable of adapting over
time
Utilising:
• End point monitoring
• Controllability
• Power conversion
What other apps could we
develop?
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 15
AC Battery
• Plug & Play
• Easy 1 person install
• 275W, 550W
• 1.2kWh
• Estimated 10-year
battery life
• ELIIY Power LiFePO4
prismatic cells
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 18
Affordability Challenge
“Tell ‘em the price, son” Little Do’er Carpets
① Cost of chemistry
② Cost of power conversion
③ Cost of installation
④ Cost of integration & control
Rightsizing vs One Size Fits All
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 19
Affordability – Chemistry
• EV market is driving down cost
• Looks just like VC money in PV market
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 20
Affordability – Power Conversion
Leverages Enphase’s core competency – The ability to produce the most
reliable, high volume, high performance, managed power electronic systems
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 21
Affordability – Installation
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 22
Affordability – Integration
Envoy-S
• Powerline communications
between devices
• Energy consumption & solar
production
• Wifi & Ethernet for reliable
networking, cellular optional
• Revenue grade metering
• Control for Zero Export
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 23
Affordability – Integration
Seamless Integration
Enlighten
• Energy consumption & solar
production
• Control dashboard for energy
management
• Adaptive system learns how to
optimise usage & savings over
time
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 24
Modularity & Expandability
• Scalable in 1.2kWh blocks
• AC is the USB of electricity
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 26
Leadership in Monitoring
Continuous feedback from 250,000 systems actively monitored in 80 countries
Approximately 1 terabyte per day
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 27
High Penetration of PV in Hawaii
Voltage issues due to high PV penetration
HECO estimated tens of millions of dollars to reprogram
• Identified 25,000 sites
• 6 months in planning
• 800,000 microinverters
• 1 week rollout
• 0 truck rolls
Allowed more solar
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 28
The Need for Smart Energy
Smart Solar
Smart Storage
Smart Energy
| © 2013 Enphase Energy, Inc. | Confidential 28
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 29
More smart energy =
More Reliable and More Efficient Grid
29
RE - Barnacle or the Brains of the Grid
OR
Adaptable Controllable Hyper
connected
| © 2015 Enphase Energy, Inc. | CONFIDENTIAL | For internal use only 31
METRIC CENTRALISED ENPHASE
Performance Lower production and conversion
efficiency
Maximize output of each PV and
storage module
Reliability Multiple single points of failure No single point of failure
Price Many expensive components Fewer components; common
microinverter for PV and battery
Simplicity Complex design and installation Simple design; Plug and play
Safety Broad distribution of high voltage
DC; thermal runaway of batteries
Traditional AC wiring;
management of thermal runaway
Scalability Limited by battery and inverter
size
Incrementally expandable; mix
and match batteries
Comparison of Storage Solutions