KE House Solar TransformationProject Preamble and Highlights

KE’s Small Scale Solar/ RE Program: Energy Conservation Department (ECD)

• KE’s in-house project manager for solar PV projects design and implementation:– 600 KW of small scale grid tied and off grid projects have been successfully completed.

• These projects ensure facility’s compliance with:– Energy conservation and efficiency targets.– Best practices in energy management.

• KE’s point of contact for both internal and external stakeholders and the leaddepartment on proposed Net Metering rules.

• The department supports and promotes state of the art technologies and solutionsfor KE’s consumers.

• Besides technical consulting services and RE projects, ECD actively conductsawareness programs which include school campaigns and industrial energyefficiency seminars throughout Karachi.

KE House Load Details

• Approximately 800 kW connected load at KE House.

• Currently 38% of this load has been switched to in house solar PV generation.

Lights2%

HVAC59%

UPS & Misc26%

Office Equipment

11%

Elevator2%

KE HOUSE LOAD DISTRIBUTION

• Two PV projects have been completed: 25 KW BOC project 267.5 KW Carport project

Potential for Solar in Karachi

Plenty of Sun hours in Karachi

• 320 days of 6 hours sunshineis taken as an approximate.

• Panels in the duration haveshown to perform to 85% oftheir rated capacity.

25 KW Rooftop PV Project – Pilot Phase

• In March 2015 management approved installation of 25 KWrooftop solar at KE House.

• Top 5 vendors had submitted their proposals which were evaluatedon techno-commercial basis.

• On the basis of above selection, Orient Energy Systems wereselected in April 2015.

• In August 2015 First Solar (USA) offered free of cost panels.

• After re-evaluation of the proposals, MAQ international and FirstSolar (USA) were awarded the contract in October 2015.

Project Overview – 25 KW BOC Rooftop PV

• The project at BOC is equipped with 225 thin film (First Solar) solar panelsand 3 SMA inverters. The PV system is grid tied and also served as the pilotproject for testing of Net Metering.

• The 25 KW project has been performing up to expectations and is capable of generating 43,500 KWh/year.

System Capacity

(KW)

Total Annual

Saving in Units

(KWh)

Total Annual Savings

(PKR Million @ Rs. 22)Payback time (Years)

Carbon Emissions

Reduction (ton/year)

25 38,400 0.85 2.7 16,500

The payback of this system is less than 3 years.

• The system also consists of a weather station and a data monitoring system that assists tracking the system’s performance.

Compliance to Network & Reliability Standards: 25 KW Pilot Net Metering Project

• Bi-directional meter is installed atthe BOC project.

• Network behavior monitoredthrough power logger & faulttesting conducted:

• Under all test conditions inverterdesynchronized with utility source

-Utility Shutdown -Phase to neutral entangle

-Phase to phase entangle -Low voltage

-Neutral break/ Voltage fluctuation

-Phase missing

-100

-50

0

50

100

150

200

250

16

-Ju

l

17

-Ju

l

18

-Ju

l

19

-Ju

l

20

-Ju

l

21

-Ju

l

22

-Ju

l

23

-Ju

l

24

-Ju

l

25

-Ju

l

26

-Ju

l

27

-Ju

l

28

-Ju

l

29

-Ju

l

30

-Ju

l

31

-Ju

l

1-A

ug

2-A

ug

3-A

ug

4-A

ug

5-A

ug

6-A

ug

7-A

ug

8-A

ug

9-A

ug

10

-Au

g

11

-Au

g

12

-Au

g

13

-Au

g

14

-Au

g

kWh

16-Jul

17-Jul

18-Jul

19-Jul

20-Jul

21-Jul

22-Jul

23-Jul

24-Jul

25-Jul

26-Jul

27-Jul

28-Jul

29-Jul

30-Jul

31-Jul

1-Aug

2-Aug

3-Aug

4-Aug

5-Aug

6-Aug

7-Aug

8-Aug

9-Aug

10-Aug

11-Aug

12-Aug

13-Aug

14-Aug

Import 0.6 0.32111811741571370.5 0.4171175172188169 17 7.12011641221861325.5 6.1130132122 99 1430.4 0.4

Export -24-86 -1 -1 -1 -1 -2 -62-82 -3 -3 -2 -2 -2 -63-54 -1 -1 -2 -1 -1 -21-36 -2 -1 -4 -6 -3 -74-70

Solar Production kWh 37 89 47 77 69 64 71 70 84 86 92 85 68 93 69 73 42 64 77 39 39 25 40 72 61 85 102 81 81 74

KE House Electricity Import & Export

Desynchronization study conducted / fault tested

Power Quality Results: 25 KW Pilot Net Metering Project

• According to IEE Std. 519-1992 Total Harmonic Distortion limit is 5 % for voltages below 69kV and above 120 V.

• Our study ensures that the inverter complies with IEEE 1547 grid interconnection code• Other parameters including voltage range, frequency range and power factor are within

acceptable limits as outlined in the interconnection code.

267.5 KW Solar Carport Project – Phase II

• March 2016, approval for the 267.5 KW solar carport project

• Orient Energy Systems and MAQ International shortlisted.MAQ backed off.

• Orient Energy Systems given go ahead in May 2016:

– Approval from CFT comprising of Business Finance, Procurement andECD.

Project Overview: 267.5 KW Carport Project

System

Capacity

(KW)

Total Annual

Saving in Units

(KWh)

Total Annual

Savings

(PKR Million @ Rs.

22)

Payback

time

(Years)

Emissions

Reduction

(ton/year)

267.5 304,749 6.7 4.6 131,651

• Equipped with 1070 poly crystalline ReneSola PV panels and 12 SMA inverters, theproject is expected to generate more than 300,000 KWh/year translating to more than6 million PKR annual saving.

• Its key features include:– Aesthetic mechanical structure

– Tier-1 PV panels, inverters and cluster controllers

Equipment Description

Solar Panels ReneSola 156Polycrystalline – 250 W

Inverter SMA Sunny Tripower25000TL

Data logger SMA Sunny Cluster

Online Monitoring System

SMA

Civil Structure Hot Dip Galvanized Iron

Key Results Achieved

• With both phases (rooftop + carport) coming online:– KE saves ~ 7.5 million PKR annually in electricity costs.– KE mitigates ~ 150,000 tons of CO2 emissions annually.

• KE house is now 38% self sufficient in its electricity usage duringoffice hours.

• These milestone energy management projects bring us closer toKE’s sustainable energy consumption goals fulfilling the ISO50001 targets.