MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS by Matimba - - PowerPoint PPT Presentation

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MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS by Matimba - - PowerPoint PPT Presentation

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DESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS by Matimba Mathebula, Xahumba Engineering Consulting (Pty) Ltd D ESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS Table of Contents Xahumba

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SLIDE 1

DESIGN, INSTALLATION AND MAINTENANCE OF SOLAR HOME SYSTEMS IN RURAL AREAS

by Matimba Mathebula, Xahumba Engineering Consulting (Pty) Ltd

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SLIDE 2

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • Xahumba Engineering Consulting (XEC) Background

Table of Contents

  • Services Offered by XEC
  • XEC Experience on Solar Systems
  • Solar Home Systems in Rural Areas

Project Background Design Installation

  • Conclusion
  • Recommendations
  • Benefits of Using Solar Systems

Maintenance

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SLIDE 3

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

XAHUMBA EENGINEERING CONSULTING BANKGROUND

  • Founded in the year 2010 as a close-corporation by Mr. Max Chauke Pr. Eng.
  • Converted to Pty Ltd in 2017
  • Directors and management remain the same
  • 100% black owned, Level 1 BBBEE rating
  • CIDB Grade: 7 EB PE, 1ME PE
  • Engineers, technologists and technicians are members of ECSA and SAIEE
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SLIDE 4

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • Electrical Engineering

XEC OFFERED SERVICES

  • Solar PV Systems
  • HVAC Systems
  • Project Management
  • Energy Audits and Management
  • Certificate of Compliance
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SLIDE 5

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • More than 1.5MW has been installed, including 2X30MW solar farms as part of IPP

SOLAR SYSTEMS EXPERIENCE

  • Installed systems include rooftops, carports and ground mounted
  • Rural, Commercial and Industrial
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SLIDE 6

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • 30kW Rooftop PV system in Limpopo (Phalaborwa)

…SOLAR SYSTEMS EXPERIENCE

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SLIDE 7

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • Testing and Commissioning of 2X30MW PV solar systems in Limpopo (Witkop & Soutpan)

…SOLAR SYSTEMS EXPERIENCE

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SLIDE 8

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • 30kW Carport PV system in Limpopo (Polokwane)

…SOLAR SYSTEMS EXPERIENCE

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SLIDE 9

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • 160W Solar Home systems in KZN, Free State and North West

…SOLAR SYSTEMS EXPERIENCE

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SLIDE 10

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

XEC CLIENTS

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SLIDE 11

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

RENEWABLE ENERGY BENEFITS

Advantages of a Solar System

No CO2 Emission Saves Water Free Power No Tariff hikes

Sun is a source

  • f energy

No fossil fuels for power generation 1,28 kilolitres per 1MWh You are your Own distributor

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SLIDE 12

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • South African Government initiated a Non-Grid Programme through Department of Energy (DoE)

SHS PROGRAMME BACKGROUND

  • High number of households without electricity has been identified
  • Solar home systems (SHS) technology identified to close the gap
  • Local municipalities across South Africa are benefiting from the programme
  • The programmed targets rural communities
  • DoE appointed XEC and Sun Electricity (Joint Venture) in 2015 to provide the design, installation

and maintenance

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SLIDE 13

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

SHS DESIGN

CLIENT SPECIFICATION

Minimum of 95Wp solar system Minimum battery of 96Ah, 12V Maximum of eight lights of8 X 3W each Connect of DC TV, Radio, DSTV and phone charger

XEC CONSIDERATIONS

2 days of autonomy Solar panel’s operation at local temperature 5W lights to be used outside instead of 3W 80% battery’s maximum depth of discharge (DoD). Daily recommended is 20% System losses Beneficiaries safety.

GUIDELINES

SANS 959-1/NRS 052-1 SANS 959-3/NRS 052-3 SANS 10142-1

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SLIDE 14

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

…SHS DESIGN (ENERGY REQUIRED)

DESCRIPTION POWER(W) QUANTITY HOURS TOTAL POWER (W) WATT-HOUR Interior Lights 3 6 4 18 72 Exterior Lights 5 2 12 10 120 TV 30 1 4 30 120 Radio 15 1 8 15 120 DSTV-Decoder 10 1 4 10 40 Phone Charger 5 2 2 10 20 Total 93 492

  • Minimum solar panel output of 93Wp
  • 100W solar panel has been selected
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SLIDE 15

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • Temperature has effect on solar panels

…SHS DESIGN (LOCAL TEMPERATURE)

  • XEC retrieved Eastern Cape Temperatures
  • -18°C on the 3rd of November 1918
  • 50°C on the 28th of June 1996
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SLIDE 16

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

…SHS DESIGN (LOCAL TEMPERATURE)

Description Max power (Pmax) 100W Max power voltage (Vmpp) 18.8V Max power current (Imp) 5.51A Open circuit voltage (Voc) 22.1V Short circuit current (Isc) 6.04A Cells Polycrystalline Number of cells 36 Temperature Coefficient Isc Voc Pmax

  • 0.051%/°C
  • 0.31%/°C
  • 0.41%/°C

Temperature at Standard Test Condition (STC) 25°C Nominal Operating Cell Temperature (NOCT) 45°C

  • Panels are tested at standard test

conditions (STC)

  • Each degree rise in temperature

above 25˚C affect other parameters

  • Short-circuit current decays by

0.051%,

  • Open-circuit voltage by 0.31%,
  • Power by 0.41%.
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SLIDE 17

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

…SHS DESIGN (LOCAL TEMPERATURE)

𝑊

𝑃𝐷_𝑛𝑏𝑦𝑗𝑛𝑣𝑛 = 𝑈𝑀𝑝𝑑𝑏𝑚_𝑁𝑗𝑜𝑗𝑛𝑣𝑛 + 𝑈𝑇𝐷 ∗ 𝑊 𝑝𝑑 𝑢𝑓𝑛𝑞𝑓𝑠𝑏𝑢𝑣𝑠𝑓 𝑑𝑝𝑓𝑔𝑔𝑗𝑑𝑗𝑓𝑜𝑢

100 + 𝑊𝑝𝑑 = −18 − 25 ∗ −0.31 100 + 21.6 = 21.73𝑊 𝑊

𝑃𝐷_𝑛𝑗𝑜𝑗𝑛𝑣𝑛 = 𝑈𝑀𝑝𝑑𝑏𝑚_𝑛𝑏𝑦𝑗𝑛𝑣𝑛 + 𝑂𝑃𝐷𝑈 − 𝑈𝑇𝐷 ∗ 𝑊 𝑝𝑑 𝑢𝑓𝑛𝑞𝑓𝑠𝑏𝑢𝑣𝑠𝑓 𝑑𝑝𝑓𝑔𝑔𝑗𝑑𝑗𝑓𝑜𝑢

100 + 𝑊𝑛𝑞𝑞 = 50 + 45 − 25 ∗ −0.31 100 + 18.8 = 18.58𝑊

  • Voc ranges between 18,58V and 21,73V
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SLIDE 18

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • Recommended days of autonomy is 2 days

…SHS DESIGN (BATTERY SIZE)

𝐶𝑏𝑢𝑢𝑓𝑠𝑧 𝐵ℎ = 𝐵𝑞𝑞𝑚𝑗𝑏𝑜𝑑𝑓𝑡 𝑋ℎ × 𝐸𝑏𝑧𝑡 𝑝𝑔 𝑏𝑣𝑢𝑝𝑜𝑝𝑛𝑧 𝐸𝑓𝑞𝑢ℎ 𝑝𝑔 𝐸𝑗𝑡𝑑ℎ𝑏𝑠𝑕𝑓 × 𝐶𝑏𝑢𝑢𝑓𝑠𝑧 𝑊𝑝𝑚𝑢𝑏𝑕𝑓 = 492 × 2 0.8 × 12 = 102.5𝐵ℎ

  • Solar panels are less effective during rainy/overcast days
  • Battery should have enough power to keep the load running
  • 102Ah battery
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SLIDE 19

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

…SHS DESIGN (BATTERY CHARGING HOURS)

  • SANS 959-1:2016 section 4.2.1.3.3, EC sun hours is 5.2

𝐼𝑝𝑣𝑠𝑡 𝑆𝑓𝑟𝑣𝑗𝑠𝑓𝑒 = 𝐶𝑏𝑢𝑢𝑓𝑠𝑧 𝐵ℎ × 𝐸𝑝𝐸 × 𝑇𝑧𝑡𝑢𝑓𝑛 𝑊𝑝𝑚𝑢𝑏𝑕𝑓 𝑇𝑝𝑚𝑏𝑠 𝑄𝑏𝑜𝑓𝑚 𝑄𝑝𝑥𝑓𝑠 = 102 × 100% × 12 100 = 12.24ℎ

  • Solar panel should have enough power to charge the selected battery
  • 100% depth of discharge used for calculations - worst case scenario
  • Approximately 2 days to charge the battery up to 100%
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SLIDE 20

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

…SHS DESIGN (BATTERY CHARGING HOURS)

1,22 2,45 3,67 4,9 6,12 7,34 8,57 9,79 11,02 12,24 2 4 6 8 10 12 14 10 20 30 40 50 60 70 80 90 100

CHARGING HOURS (H) DOD (%)

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SLIDE 21

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

…SHS DESIGN (SUMMARY)

  • 100Wp Solar Panel
  • 102Ah, 12V Battery
  • 10A Charge Controller
  • 3W Internal Lights
  • 5W Exterior Lights
  • DC TV, Radio and DSTV Points
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SLIDE 22

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • XEC deployed more than 10 installation teams

SHS INSTALLATIONS

  • Qualified and experienced personnel conducted the installations
  • Detailed training conducted prior to commencement
  • Health and quality issues we tackled
  • One system installed and used as a standard system prior to commencement of installations
  • Inspection of material
  • Potential threats were identified and planned for
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SLIDE 23

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

…SHS INSTALLATIONS(IDENTIFIED THREATS)

THREATS IMPACT MITIGATION

  • Bad roads
  • More time spent on delivery
  • Beneficiaries to collect material from

a neutral point.

  • Cracked walls
  • It puts the lives of workers in

danger.

  • Beneficiaries

might sue for cracked walls.

  • Avoid climbing on cracked walls.
  • Take pictures of the cracked walls.
  • Beneficiaries must sign a declaration

forms.

  • Shading
  • Solar panel produces less or no

power due to shading.

  • Install solar panels where it will get

enough radiation from the sun.

  • Arrange for the tree/s to be cut down

if the shading is caused by trees.

  • Home owners not available
  • Disturbance
  • f

the installation schedule.

  • Delay of the project
  • Share

installation schedules with ward committees.

  • Word of mouth is very powerful in

rural areas; therefore, spread out a word one or two days in advance.

  • Community members attacking

technicians

  • Injuries and/or loss of lives
  • Loss
  • f

trust and sound workmanship

  • Have local labourer/s on site.
  • Ward

committees to accompany installation teams.

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SLIDE 24

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

…SHS INSTALLATIONS (PICTURES)

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SLIDE 25

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

…SHS INSTALLATIONS (PICTURES)

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SLIDE 26

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • Systems malfunction as time goes on

SHS MAINTENANCE

  • Maintenance is conducted to keep the system in good condition
  • XEC has set up an office and system to deal with maintenance
  • Beneficiaries were provided with unique number during installations stages
  • Unique numbers are linked to beneficiaries information
  • Beneficiaries are only requested to verify ID numbers and locations
  • Job order is created an assigned to the closest team
  • Respond time is 24 hours
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SLIDE 27

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • Beneficiaries disconnecting the systems

…SHS MAINTENANCE (CHALLENGES)

  • Illegal connections
  • Stolen systems
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SLIDE 28

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • XEC and its partner has installed 10000 SHS between March 2015 and May 2018

CONCLUSION

  • 423 job opportunities were created, 400 were local labourers (87 female)
  • Installed SHS met client specifications and needs of beneficiaries
  • XEC edge the government to continue with the programme
  • Installation of SHS restores dignity to South African people
  • School children have adequate light environment
  • Loss of lives has reduced
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SLIDE 29

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

  • SHS sizes should be increased

RECOMMENDATIONS

  • Inverters should be deployed to the systems
  • Local municipalities should use the opportunity to uplift small local enterprises
  • Local municipalities should assist in identifying communities in need
  • South African Government should provide more funds for implementation of solar systems
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SLIDE 30

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

THANK YOU!!!!!!

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SLIDE 31

Presenter: Mr. Matimba Mathebula DATE: 23 October 2018

DESIGN, INSTALLATION AND MAINTENANCE OF

SOLAR HOME SYSTEMS IN RURAL AREAS

FEEL FREE TO CONTACT US

Matimba Mathebula 071 110 7697/matimbam@Xahumba.co.za Max Chauke 082 802 0668/max.Chauke@Xahumba.co.za Office 086 999 0232/admin@Xahumba.co.za