Establishing a Community Microgrid A resilient, renewable energy - - PowerPoint PPT Presentation

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Establishing a Community Microgrid A resilient, renewable energy - - PowerPoint PPT Presentation

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Establishing a Community Microgrid A resilient, renewable energy solution Bob OHagan Frank Wasko Programs Engineer Managing Director 408-394-9067 mobile 949-501-0967 mobile bob@clean-coalition.org frank@clean-coalition.org Making Clean

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Making Clean Local Energy Accessible Now

A resilient, renewable energy solution

Establishing a Community Microgrid

Frank Wasko

Managing Director 949-501-0967 mobile frank@clean-coalition.org

07 Nov 2019

Bob O’Hagan

Programs Engineer 408-394-9067 mobile bob@clean-coalition.org

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2 Making Clean Local Energy Accessible Now

Presentation Outline

  • Background
  • About the Clean Coalition
  • Unleashing wholesale distributed generation
  • Microgrids
  • Microgrids
  • Community microgrids
  • Sample from PAEC grant project
  • FITs
  • Example: Humboldt County Airport
  • Q&A
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About the Clean Coalition

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Clean Coalition (non-profit)

Mission To accelerate the transition to renewable energy and a modern grid through technical, policy, and project development expertise. Renewable Energy End-Game 100% renewable energy; 25% local, interconnected within the distribution grid and ensuring resilience without dependence on the transmission grid; and 75% remote, fully dependent on the transmission grid for serving loads.

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5 Making Clean Local Energy Accessible Now

Wholesale DG is the Critical & Missing Segment

Distribution Grid Project Size Behind the Meter

Central Generation

Serves Remote Loads

Wholesale DG

Serves Local Loads

Retail DG

Serves Onsite Loads Transmission Grid

5 kW 50+ MW 500 kW

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6 Making Clean Local Energy Accessible Now

Microgrid – one definition

From: U.S. Department of Energy Microgrid Exchange Group A microgrid is a group of interconnected loads and distributed energy resources within clearly defined electrical boundaries that acts as a single controllable entity with respect to the grid. A microgrid can connect and disconnect from the grid to enable it to operate in both grid-connected or island-mode.

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Microgrids

Electricity generation and storage occurs on site, behind the utility

  • meter. If the utility

disconnects power, the specific building will stay energized.

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Must decide the priority of loads to be served

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Community Microgrid

https://www.noozhawk.com/article/craig_lewis_community_microgrid_public_safety_power_shutoffs_20191023

A Community Microgrid serves an entire community by ensuring indefinite renewables-driven backup power for critical community facilities such as fire stations, water and communications infrastructure, hospitals and emergency shelters.

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Core PAEC Region with Solar Siting Survey

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11 Making Clean Local Energy Accessible Now Redwood City Corporate Yard Redwood City USPS San Mateo County Corporate Yard Boys & Girls Club Hoover Elementary School Stanford Redwood City Hoover Park Stanford Medicine Outpatient Clinic

Redwood City Disadvantaged Community and Community Microgrid Sites

Sobrato Broadway Plaza CVS

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Redwood City Community Microgrid Conceptual Diagram

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Hoover Cluster Conceptual Diagram

126 kW Solar Carport 77 kW Solar Carport Hoover School Main Transformer 30 kW/ 150 kWh Battery

M M M

83 kW Solar Carport

Not drawn to scale

10 L2 EVCI ports 10 L2 EVCI ports 10 L2 EVCI ports 73 kW Rooftop Solar BGCP Main Transformer BGCP Meter Main Hoover School Meter Main Proposed trenching path Hoover Park Meter Main Proposed overhead conduit path 18 kW Rooftop Solar

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ICA (Interconnection Capacity Analysis) Map for PCE HQ

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Benefits of a FIT

  • Unleashes commercial-scale project opportunities: A FIT simplifies

the process for all properties to participate in energy generation, which is not true of Net Energy Metering (NEM). FITs address all properties, including those that are non-owner occupied and split-metered. FITs also maximize siting potential by eliminating any on-site load limitations.

  • Maintains retail customer relationships: 100% of FIT energy is

delivered to the Load Serving Entity (LSE) wholesale and the LSE’s retail customers, even those hosting FIT projects, continue paying for 100% of the energy they consume under a normal retail tariff. Importantly, this maintains customer motivations to pursue energy efficiency measures.

  • Guides the market to build desired Wholesale DG projects: Through

design features, including pricing adders, FITs can be tailored to drive deployment of projects that have specific characteristics such as location, size, configuration (on built-environments etc.) and dispatchability (via renewables+storage pairing).

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Site%Name Meters%or% Buildings Critical%Loads NEM%Solar% [kW%AC] FIT%Solar% [kW%AC] Total% Solar%[kW% AC] Battery% [kW] Battery% [kWh] EVCI% (Level%2)

Stanford)Redwood) City Phase)1 P1,)B16B4 Campus)emergency) response 886 886 251 2,100 52 Hoover)School Shelter)&)food)service 73 203 276 29 150 20 Boys)&)Girls)Club Shelter)&)food)service 11 90 101 10 Hoover)Park Equipment)staging Redwood)City) Corporate)Yard Redwood)City) Corporate)Yard Road)and)public) facility)maintenance) and)repair 136 352 488 58 360 *4 San)Mateo)County) Corporate)Yard San)Mateo)County) Corporate)Yard Road)and)public) facility)maintenance) and)repair 100 173 273 TBD TBD *4 Sobrato)Broadway) Plaza)(multiple) meters) Low)income)housing 1,197 1,197 TBD TBD TBD Sobrato)CVS Pharmacy)&)grocery 83 83 TBD TBD TBD %%%%%%%%%%%%1,206% %%%%%%%%%2,098% %%%%%%%%%3,304% %N% 2,610 82 Hoover)Cluster) Sobrato)Broadway) Plaza New)Deployments)TOTAL

Deployment Summary

With net metering, only 1.2 MW can be deployed. With a new FIT program, an additional 2.1 MW of local, renewable generation could be deployed in a disadvantaged community.

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17 Making Clean Local Energy Accessible Now

Humboldt County Airport Microgrid – Multi-customer

March 9, 2018 By Renewable Energy World Editors California is hoping that lessons learned from a new microgrid project at Humboldt County’s regional airport will help create a road map for microgrid integration in the state. The microgrid, which was designed by the Schatz Energy Research Center, will include a 2.3-MW solar PV array and an 8-MWh battery storage system. It will support 18 electric accounts, including the airport in Humboldt County and the U.S. Coast Guard Air Station, Humboldt Bay. The California Energy Commission in February awarded a $5 million grant through its Electric Program Investment Charge program … The Schatz Center said that the microgrid, which is the first multi-customer microgrid in Pacific Gas and Electric’s service territory, will provide a test bed for the policies, tariff structures, and operating procedures necessary to integrate microgrids into California’s electric grid. Source: http://www.renewableenergyworld.com/articles/2018/03/can-this-airport-...

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Thank you!

Bob O’Hagan

Programs Engineer 408-394-9067 mobile bob@clean-coalition.org

Q & A

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Excerpts from PAEC Grant Study

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PAEC SSS Summary by PV Size

Summary by Structure PV Size

Num_Sites kW_Total PV W_AC >= 500 kW > and >= 250 kW Less than 250 kW Totals: 484 66,228 kW 24 17,073 kW 56 18,840 kW 404 30,315 kW Atherton, CA 94027 33 1,502 kW

  • kW
  • kW

33 1,502 kW Menlo Park, CA 94025 102 18,909 kW 7 5,786 kW 17 5,544 kW 78 7,579 kW East Palo Alto, CA 94303 91 8,134 kW 4 2,499 kW 2 575 kW 85 5,060 kW Redwood City, CA 94061 14 1,190 kW

  • kW

1 445 kW 13 745 kW Redwood City, CA 94062 18 740 kW

  • kW
  • kW

18 740 kW Redwood City, CA 94063 90 17,532 kW 9 6,466 kW 13 4,349 kW 68 6,717 kW Redwood City, CA 94065 53 10,049 kW 1 532 kW 17 5,968 kW 35 3,550 kW San Carlos, CA 94070 42 5,618 kW 2 1,258 kW 5 1,633 kW 35 2,727 kW Belmont, CA 94002 27 1,403 kW 1 532 kW

  • kW

26 871 kW Woodside, CA 94062 14 1,151 kW

  • kW

1 327 kW 13 824 kW

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Summary of PV Aggregations by Type

Apartments Biz Edu Shopping Storage Hospital Bus Num_Sites kW_Total Num_Sites kW_Total Num_Sites kW_Total Num_Sites kW_Total Num_Sites kW_Total Num_Sites kW_Total Num_Sites kW_Total Atherton, CA 94027

  • kW
  • kW

5 1,502 kW

  • kW
  • kW
  • kW
  • kW

Menlo Park, CA 94025

  • kW

3 4,954 kW 5 865 kW

  • kW
  • kW
  • kW
  • kW

East Palo Alto, CA 94303 2 763 kW

  • kW

8 1,726 kW 2 3,440 kW 3 582 kW

  • kW
  • kW

Redwood City, CA 94061

  • kW
  • kW

1 195 kW 1 996 kW

  • kW
  • kW
  • kW

Redwood City, CA 94062

  • kW
  • kW

1 740 kW

  • kW
  • kW
  • kW
  • kW

Redwood City, CA 94063 1 369 kW

  • kW

4 587 kW 7 7,904 kW 5 1,940 kW 2 3,309 kW

  • kW

Redwood City, CA 94065

  • kW

6 5,869 kW 1 115 kW 2 1,550 kW

  • kW
  • kW
  • kW

San Carlos, CA 94070

  • kW

1 1,208 kW

  • kW

1 544 kW 4 1,617 kW

  • kW

1 278 kW Belmont, CA 94002

  • kW
  • kW

1 871 kW

  • kW
  • kW
  • kW
  • kW

Woodside, CA 94062

  • kW
  • kW

1 1,151 kW

  • kW
  • kW
  • kW
  • kW

Totals: 3 1,132 kW 10 12,031 kW 27 7,752 kW 13 14,433 kW 12 4,139 kW 2 3,309 kW 1 278 kW

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22 Making Clean Local Energy Accessible Now

Solar Siting Survey Data Excerpt

Site name, identifier,

  • ccupant or

description of structure if known Street address City and ZIP code Gmap Addr Lat_Lon Latitude of structure Longitude of structure Marker Symbol on Map Scale Factor for Symbol in Display. Blank = 1 Color attribute for Symbol Short Add'l Text for G- Earth Symbol Label Scale Factor for Label. Blank = 1 Color attribute for Label. Flags 1st use of an address in group Surface area in sqft Structure type PV power density assesment Estimated PV potential [W, AC] Total PV potential at this address [W, AC] Comments re area or assessment Flag for PRP site

Site_Desc Address City_ZIP G-Map Coord Lati Longi Map_Sym Sym_Scl Sym_Clr Label_Text Label_Scl Label_Clr Site_Seq Area_ft2 PV_Type PV_Rating Struc_W Site_Sum_W Comments PRP_24 Sacred Heart School 150 Valparaiso Aven Atherton, CA 9402 37.4487523,-122.1969992 37.449911

  • 122.196095 Edu

1.75 1

  • 681,600

SHS Main Bldg-10 150 Valparaiso Aven Atherton, CA 94027 37.448557

  • 122.196755 Roof_Flat
  • 19,200

Roof_Flat Medium 115,200

  • SHS Prac Gym-33

150 Valparaiso Aven Atherton, CA 94027 37.447628

  • 122.197487 Roof_Flat
  • 9,700

Roof_Flat Medium 58,200

  • SHS Homer Sci-3

150 Valparaiso Aven Atherton, CA 94027 37.447548

  • 122.196827 Roof_Flat
  • 14,000

Roof_Flat Medium 84,000

  • SHS McGanney Sports-1

150 Valparaiso Aven Atherton, CA 94027 37.447824

  • 122.195852 Roof_Flat
  • 12,700

Roof_Flat Medium 76,200

  • S Slope Roof, too

SHS Campbell Perf Arts 150 Valparaiso Aven Atherton, CA 94027 37.449224

  • 122.196675 Roof_Flat
  • 8,900

Roof_Flat High 62,300

  • SHS Unk Bldg PV Exist 150 Valparaiso Aven

Atherton, CA 94027 37.447774

  • 122.197007 Roof_Example
  • 5,000

Existing Medium

  • Existing

SHS Bergeron Lower Sc 150 Valparaiso Aven Atherton, CA 94027 37.451246

  • 122.195207 Roof_Flat
  • 9,700

Roof_Flat High 67,900

  • SHS Stevens Library

150 Valparaiso Aven Atherton, CA 94027 37.451622

  • 122.195960 Roof_Example
  • 6,600

Existing Medium

  • Existing

SHS Johnson Performin 150 Valparaiso Aven Atherton, CA 9402 37.4515316,-122.1975486 37.451527

  • 122.196621 Roof_Flat
  • 11,100

Roof_Flat Medium 66,600

  • BingBird missing newer bldgs

SHS Murphy Administra 150 Valparaiso Aven Atherton, CA 9402 37.4511111,-122.1969364, 37.451102

  • 122.196022 Roof_Flat
  • 6,200

Roof_Flat High 43,400

  • BingBird missing newer bldgs

SHS Xie Middle Schoo 150 Valparaiso Aven Atherton, CA 9402 37.4507507,-122.1964871 37.450579

  • 122.195388 Roof_Flat
  • 9,300

Roof_Flat High 65,100

  • BingBird missing newer bldgs

SHS Spieker Pavilion 150 Valparaiso Aven Atherton, CA 94027 37.450823

  • 122.194686 Roof_Flat
  • 4,000

Roof_Flat High 28,000

  • SHS Unkown Bldg

150 Valparaiso Aven Atherton, CA 94027 37.450692

  • 122.194197 Roof_Flat
  • 2,100

Roof_Flat High 14,700

  • Menlo Atherton HS

555 Middlefield Rd Atherton, CA 9402 37.4615008,-122.1757558, 37.461196

  • 122.175029 Edu

1.75 1

  • 352,100

Perf Arts Ctr 555 Middlefield Rd Atherton, CA 94027 37.460935

  • 122.175132 Roof_Flat
  • 1,200

Roof_Flat High 8,400

  • BingBird missing newer bldgs

B_Wing-1-5 555 Middlefield Rd Atherton, CA 9402 37.461632, -122.176066 37.461432

  • 122.176671 Roof_Angled
  • 2,000

Roof_AngledHigh 14,000

  • B_Wing-9-12

555 Middlefield Rd Atherton, CA 9402 37.461632, -122.176066 37.461421

  • 122.176030 Roof_Angled
  • 2,900

Roof_AngledHigh 20,300

  • B_Wing-2-23

555 Middlefield Rd Atherton, CA 94027 37.461390

  • 122.175294 Roof_Angled
  • 3,000

Roof_AngledHigh 21,000

  • C_Wing-0-5

555 Middlefield Rd Atherton, CA 9402 37.461658,-122.1778895, 37.461661

  • 122.176896 Roof_Angled
  • 3,100

Roof_AngledHigh 21,700

  • C_Wing-10-15

555 Middlefield Rd Atherton, CA 9402 37.461632, -122.176066 37.461608

  • 122.176049 Roof_Angled
  • 1,900

Roof_AngledHigh 13,300

  • D_Wing-1-9

555 Middlefield Rd Atherton, CA 94027 37.461882

  • 122.176834 Roof_Angled
  • 9,000

Roof_AngledHigh 63,000

  • D_Wing-12-17

555 Middlefield Rd Atherton, CA 94027 37.461832

  • 122.176030 Roof_Angled
  • 2,000

Roof_AngledHigh 14,000

  • D_Wing-22-24

555 Middlefield Rd Atherton, CA 94027 37.461801

  • 122.175242 Roof_Angled
  • 1,800

Roof_AngledHigh 12,600

  • E_Wing-12-16

555 Middlefield Rd Atherton, CA 94027 37.462018

  • 122.176009 Roof_Angled
  • 900

Roof_AngledHigh 6,300

  • E_Wing-19-26

555 Middlefield Rd Atherton, CA 94027 37.462001

  • 122.175320 Roof_Angled
  • 2,200

Roof_AngledHigh 15,400

  • M-1-3

555 Middlefield Rd Atherton, CA 9402 37.461153, -122.174323 37.461171

  • 122.174314 Roof_Angled
  • 3,500

Roof_AngledHigh 24,500

  • S-1-2

555 Middlefield Rd Atherton, CA 94027 37.461136

  • 122.174049 Roof_Angled
  • 5,300

Roof_AngledHigh 37,100

  • New Gym

555 Middlefield Rd Atherton, CA 94027 37.462031

  • 122.173043 Roof_Angled
  • 11,500

Roof_AngledHigh 80,500

  • Menlo School

50 Valparaiso Avenu Atherton, CA 9402 37.4532637,-122.1918336 37.453597

  • 122.192068 Edu

1.75 1

  • 165,900

MS Stent-26 50 Valparaiso Avenu Atherton, CA 94027 37.453414

  • 122.191790 Roof_Flat
  • 5,300

Roof_Flat High 37,100

  • MS Ath Ctr-30

50 Valparaiso Avenu Atherton, CA 94027 37.453358

  • 122.192739 Roof_Example
  • 8,000

Existing High

  • MS Ath Ctr S-30

50 Valparaiso Avenu Atherton, CA 94027 37.453499

  • 122.192578 Roof_Angled
  • 1,500

Roof_AngledHigh 10,500

  • MS Ops Off-40

50 Valparaiso Avenu Atherton, CA 94027 37.452994

  • 122.193013 Roof_Angled
  • 6,100

Roof_AngledHigh 42,700

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PAEC Solar Siting Survey Example of Information

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ICA data at feeder into San Carlos City Hall

500 kW PV should be straightforward interconnection

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Solar and Storage Metrics

  • Energy Production:
  • Units: [kWh] (kilowatt hours)
  • Energy = (Power)*(Time) and [kWh] = (kW)*(hours)
  • Example: (10kW)*(1 hour) = 10 kWh
  • Solar System Size:
  • Units: [kW DC] (kilowatts direct current)
  • Wattage of the actual panels e.g. 3.2 kW
  • Energy Storage Size:
  • Units: [kW AC]/[kWh] (kilowatts alternating current)
  • [kW AC] is the amount of power the battery can provide at any

time

  • [kWh] is the total amount of energy that can be stored
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About the Clean Coalition

  • We have a wealth of experience in microgrid planning

and engineering and focus on economic, environmental, and resilience benefits.

  • Renewable energy modeling and design

○ 15+ Community Microgrid feasibility assessments completed to date with clients including Stanford University, various Fortune 500 companies, and multi-national IPPs ○ 2 California Energy Commission (CEC) grants ○ 1 Department of Energy (DoE) grant ○ 1 National Renewable Energy Labs (NREL) contract

  • Experience working with utilities

■ IOUs: PG&E, SCE, SDG&E, PSEG Long Island. ■ Municipal utilities: CPAU, LADWP, SMUD. ■ Current active projects with PG&E, SDG&E, SCE, CPAU.

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What does a community microgrid study look like?

Excerpts from presentation to Calistoga City Council 05 November 2019

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Phase 1 Steps

Solar Siting Survey

Survey existing rooftops, parking lots, parking structures and

  • ther open space to

determine physical space available for solar photovoltaic installations.

Site Selection Technical and Economic Analysis Final Presentation

Consult with stakeholders to determine which facilities are most critical to the

  • community. Reference

available space for solar photovoltaic installation. Collect interval data to determine annual load, estimated solar system size and storage size needed for community critical facilities. Develop preliminary financials. Compile specific site reports and overall project impacts.

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Stakeholder Engagement Discussed potential microgrid sites with various business

  • wners, city council members, facilities managers

Vestibulum congue Vestibulum congue Vestibulum congue

Power Shut Down Impacts Project Specifics Community benefit

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Conceptual System Schematic

Solar Critical Loads and Solar Generation Non-critical Loads Tier 2 & 3 Loads Calistoga Substation Transmission ES Energy Storage Tier 1 Loads

Diagram Elements

Autonomously Controllable Microgrid Relay/Switch (open, closed) Electrical panel Power Converter

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Site Selection Cal Mart Annual load offset: 70% Dunaweal WWTP Annual load offset: 100% Elementary School Annual load offset: 100% Fairgrounds Annual load offset: 104% Fire Station Annual load

  • ffset: 100%

Jr-Sr High School Annual load offset: 100%

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Savings Analysis Example: Cal Mart

Used Geli’s ESyst tool to determine financial benefit for a grid- connected system that takes advantage of peak shaving and demand charge management. Demand Savings Demand Charge Energy Charge Energy Savings 64.8% 35.2% 40.0% 21.2% 17.3% 16%

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Site Summary

Site Total Annual Energy Use [kWh] Existing Solar [kW AC] New Solar [kW DC] New Annual Solar Gen. [kWh] Battery [kW] Battery [kWh] Cal Mart 900,501

  • 480

626,310 300 2,000 Calistoga Elementary School 219,617 65 145 220,899 60 180 Calistoga Fairgrounds 308,559

  • 210

322,927 120 1,440 Calistoga Jr-Sr High School 92,846 46 64 93,218 30 150 Dunaweal WWTP 1,017,489

  • 660 1,015,618

200 2,000 Fire Station 63,002

  • 42

63,984 30 90 TOTALS 2,602,014 111 1,601 2,342,956 740 5,860

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Portfolio Summary

Proposed New Assets 1,601 kW Solar 740 kW / 5,860 kWh Energy Storage Annual Generation 2,342,956 kWh Percentage of Load Served 111% of current usage Current Annual Electricity Spend* $563,100 Annual Electricity Savings $346,557 Payback Period** 8.5 - 25 years / site

*Electricity costs are expected to increase 3% annually; savings will scale with cost increases. **Payback assumes converter and battery need to be replaced every 10 years

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Financing Options

  • 1. Power purchase agreement (PPA)
  • a. Typically a must-take contract. Whoever it’s

contracted to must purchase all.

  • b. 90% of commercial PV systems are financed

through PPAs.

  • 2. Energy services agreement (ESA)
  • a. Similar to a PPA, but includes energy efficiency

technology as well.

  • 3. Direct purchase
  • a. Large capital costs make this option difficult for most

customers.

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36 Making Clean Local Energy Accessible Now

Power Purchase Agreement

Utility

  • Continues to provide

regular electric service

  • Provides net metering

credit to Host

Host

  • Receives energy from
  • n-site PV system
  • Demand charge

savings from storage

  • Predictable electricity

costs

Developer

  • Coordinates financing,

design & construction

  • Process all incentives

including tax benefits

  • Monitor performance

Regular kWh service Excess PV kWh 5-25 year PPA or ESA PV kWh

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Potential incentives

Incentive Provider Form Technologies Restrictions Federal Investment Tax Credit - 26% Fed Tax incentive Solar PV, energy storage Incentive step- down:2020- 26%, 2021- 22%, 2022- 10% MACRS accelerated or Bonus Depreciation Fed Tax incentive Solar PV, energy storage Self-Generation Incentive Program California State Tax incentive Energy storage MCE NEM Credit- $0.01/ kWh more than PG&E MCE Energy bill credits Solar PV $5,000 cap for monthly credit rollover Qualified Energy Conservation Bonds (QECBs) Fed Bond Renewable Generation Tax credit at 70% of rate set by Treasury Certified Renewable Energy Bonds (CREBs) Fed Bond Renewable Generation Tax credits are taxable income Department of Energy Loan Guarantee Program Fed - DoE Loan Guarantee High risk technologies

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Making Clean Local Energy Accessible Now

38

  • Generating widespread media attention, including these pieces and more:
  • Achieving resilience through renewables-driven Community Microgrids | Energy Central

(August 25, 2019)

  • Threat of Wildfires and Power Shutdowns Heightens Urgency for Microgrid in California

Community | Microgrid Knowledge (August 5, 2019)

  • California city seeks “community microgrid” to defend against fire season | pv

magazine (August 1, 2019)

  • This California city is trying a community microgrid to improve resiliency against wildfires,

PG&E shutoffs | Solar Builder Magazine (July 30, 2019)

  • Fearing more PG&E shutoffs, Calistoga works on microgrid plan for backup power | Napa

Valley Register (April 4, 2019)

  • Calistoga Microgrid plan for backup power moves forward | The Weekly Calistogan (April

3, 2019)

  • California Wildfires and Related Outages Get City Thinking about a Microgrid | Microgrid

Knowledge (January 24, 2019)

  • City of Calistoga flush with $8.3 million, will also consider alternative ‘microgrid’ | Napa

Valley Register (January 16, 2019)

Calistoga Community Microgrid Initiative in the media

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Site Evaluation Matrix

  • Solar System Size (kW)

○ Results from Solar Sizing Survey of how big of a solar system site could install based on physical space

  • Load Size

○ Estimate of load size - utility restricts system size to not exceed previous annual load

  • Community Benefit

○ 5 benefits everyone, 3 benefits 50% of population, 1 benefits very few members

  • Stakeholder Interest

○ 1 count for each stakeholder that mentioned the site

  • Resilience Zone

○ Preference given to sites outside of PG&Es proposed resilience zone

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Site Evaluation Matrix

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Site Report: Cal Mart Cal Mart 430 kW solar 300 kW/2.0 MWh storage Annual load offset: 70%

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42 Making Clean Local Energy Accessible Now

Savings Analysis: Cal Mart Used Geli’s ESyst tool to determine financial benefit for a grid-connected system that takes advantage of peak shaving and demand charge management.

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43 Making Clean Local Energy Accessible Now

Site Report: Cal Mart

Location Cal Mart - 1491 Lincoln Avenue Proposed New Assets 430 kW Solar 300 kW / 2,000 kWh Energy Storage Total Project Cost $3.2 million Net Present Value

  • $670k

IRR 2% Annual Generation 626,310 kWh (70% of current usage) Current Annual Electricity Spend $165,000 Annual Electricity Savings $88,801 Payback Period 20.7 years