Data Sources: PG&E s 2002 Corporate Environmental Report, and PG&E s K. PG&E 2020 forecast is based on PG&E s 2014 RPS Compliance report

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2 Data Sources: PG&E s 2002 Corporate Environmental Report, and PG&E s K. PG&E 2020 forecast is based on PG&E s 2014 RPS Compliance report filing. 2

3 Cumulative Customer Solar Capacity 25% of all U.S. rooftop PV installations 34% CAGR 240,000+ solar customers, more than any other U.S. utility 6,000 new solar customers each month industry-leading interconnection speed Customer PV capacity almost 10% of PG&E s coincident peak system capacity

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8 Provide solar customers with visibility into generation data 8

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19 1 See Act 37, 2013 Session Laws of Hawaii 2 See Decision and Order No Exhibit A, page 25.

20 1 See Decision and Order No at Exhibit A page 4 2 See Decision and Order No at Exhibit A page 5 3 See Decision and Order No at Exhibit A page 16.

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26 Sep 2013

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28 100 MW Interconnection (rendered) 200 MW of flexibility (discharge + charge) Project Description: 2x50 MW advanced battery array Provides local capacity reliability 4 hour duration 24x7 power resource No emission or water 20-Year Tolling PPA

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30 Benefits Avoided load shedding and emergency curtailment Increased energy production and reduced cost Increased system security Inertia-like performance 24 MW Los Andes Resource Atacama, Chile

31 20 MW interconnected Angamos resource Antofagasta, Chile

32 98 MW Laurel Mountain Wind Farm with 32 MW interconnected storage West Virginia, USA

33 Primary Control Reserve (frequency regulation) for integrated market (DE, NL, CH, AU) Impact: Reduce total reserve cost Fast, accurate reserves Increased system flexibility Opportunity to explore fast resource benefits 20 MW Zeeland Resource Vlissingen, Netherlands

34 Market Director, Western US AES Energy Storage

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47 Certain Investments in the Face of Uncertainty 2016 Smart Wires Inc. The information and methodologies outlined herein are proprietary to Smart Wires Inc. and their expression in this document is copyrighted with all rights reserved. This material is strictly confidential and copying or distributing it without prior written permission is strictly prohibited.

48 Navigating a Challenging Storm 1 Rapidly changing generation 2 Unpredictable future load Challenge building new lines and stranded asset risk 3 4 Global, energy-driven economy 2016 Smart Wires, Inc. Company Confidential Slide 48

49 Flexible technologies for an uncertain future Advanced Power Flow Control Dynamic Line Rating Advanced EMS Data Analytics Energy Efficiency Energy Storage Demand Response 2016 Smart Wires, Inc. Company Confidential Slide 49

50 The Smart Wires Advantage Before Smart Wires Future planning overload (simplified) With Smart Wires Guardian Push power to alternate lines +5 MW (resolve overload) With Smart Wires Router Pull power to line with capacity +20 MW (Router can either push or pull) 2016 Smart Wires, Inc. Company Confidential Slide 50

51 A Dynamic Grid for an Uncertain Future 1. Quickly Deployable 2. Optionality 3. Redeployable 4. Short Need Windows 2016 Smart Wires, Inc. Company Confidential Slide 51

52 A Dynamic Grid for an Uncertain Future 1. Quickly Deployable 2. Optionality 3. Redeployable 4. Short Need Windows 2016 Smart Wires, Inc. Company Confidential Slide 52

53 A Dynamic Grid for an Uncertain Future 1. Quickly Deployable 2. Optionality 3. Redeployable 4. Short Need Windows 2016 Smart Wires, Inc. Company Confidential Slide 53

54 Strategic Smart Wires Solutions 1 Avoid Construction Smart Wires enables 40% renewables and eliminates new lines for a European utility 2 Rapid Solution Deployable in weeks, Smart Wires is typically 80% less than the cost of reconductoring and can be deployed in a small fraction of the time 3 Enable Projects Extend outage windows to reconductor & make voltage upgrades to strategic projects 4 No Regrets Investment Smart Wires solutions are all quickly redeployable because the best grid operators embrace the uncertainties around future generation and load 5 Better Integrate Renewables DNV GL Study: Deploying Smart Wires cut transmission investment costs by $1.8B (out of $4B) and lowered consumer energy bills by more than $800M per year 2016 Smart Wires, Inc. Company Confidential Slide 54

55 Technology Incubated by Utilities for Utilities Customers & Partners Leadership Jim Davis Smart Wires CEO Former President of Chevron Energy Solutions Tom Voss Smart Wires Chairman Former CEO, Ameren Advisory Board David Ratcliffe Former, Chairman & CEO, Southern Co. David Whiteley Executive Director Eastern Interconnection Planning Collaborative Elisabeth Brinton Former Corp. Strategy Officer, PG&E John Gaskell Former President & CEO of ABB Australia Rod West Chief Administrative Officer Entergy Anjan Bose Regents Professor, WSU IEEE Fellow Daniel Dobbeni President, GO 15 Former President, ENTSO E 2016 Smart Wires, Inc. Company Confidential Slide 55

56 Intelligent Energy Storage Key Enabler for a Smart Solar / Smart Grid Future May 23, Stem, Inc. Proprietary and Confidential 1

57 About Stem Founded: 2009 Operations: California, New York and Hawaii Highlighted Smart Solar / Smart Grid DOE Solar Controller (Sunshot grant) HECO 1 MW Grid Response Wholesale Integration Pilots: PG&E Supply Side Pilot, Excess Supply Pilot Hawaii SHINES Project 2016 Stem, Inc. Proprietary and Confidential 2

58 Stem Leadership: Energy storage is ready Largest Market Share Most Project Finance Most Utility Contracts Wholesale Market Leader More sites than all others combined Largest, most innovative funds 1 st in Real-Time & Day-Ahead 200+ Systems Operational $350M+ (6x nearest competitor) 100+ bids, 100% execution Working with 20% of Fortune 500 High Caliber Investors Distinguished Awards Premium Partners Thought Leader National and industry press Frequent analyst coverage 500M+ media impressions per year 2016 Stem, Inc. Proprietary and Confidential 3

59 Stem is providing <1 sec data and storage for HECO Deploying 1MW of energy storage across a number of commercial customer sites. Stem is helping HECO by adding: Fast ramping assets to address the duck curve Load control for grid operation Customers engagement with storage and software for bill savings A partner on difficult policy issues to support stable growth 2016 Stem, Inc. Proprietary and Confidential 4

60 What we can see, we can fix 2016 Stem, Inc. Proprietary and Confidential 5

61 SHINES Building on Grid Response 2015 Stem, Inc. Proprietary and Confidential

62 Fleets of Storage as Grid Resource Aggregation acts as a virtual power plant for grid operators during periods of high demand Utility contract guarantees reduction or capacity Predictive software selects storage systems with spare capacity Aggregated fleet of systems creates a generation-like resource for the utility Unlocks additional customer value by accessing additional value streams 2015 Stem, Inc. Proprietary and Confidential 7

63 Stem enables a more sustainable grid Helping organizations participate in the next great revolution in energy technology Empower Energy Consumers Increase Grid Efficiency Enable Renewable Energy Distributed storage activates energy consumers and is the fastest and cheapest way to solve distribution-level challenges. Relieving the strain on the grid during peak times reduces the need for peaker plants and increases utilization rates. Keeping the grid stable at high penetration levels of wind and solar enables widespread reliance on renewables Stem, Inc. Proprietary and Confidential 8

64 A series of Firsts Aloha 2016 Stem, Inc. Proprietary and Confidential 9