POWER GRID CORPORATION OF INDIA LTD.

(A Government of India Enterprise)

TECHNICAL SPECIFICATION

Grid Interactive Roof top Solar PV Power Plants at Nagpur and

Raigarh POWERGRID office and Township area

VOLUME-II

SPECIFICATION NO.:

(This document is meant for the exclusive purpose of bidding against this
specifi cation and shall not be transferred, reproduced or otherwise used for
purposes other than that for which it is specifi cally issued).

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 Technical Specification of Grid Interactive Roof top Solar PV Power Plants at
Nagpur and Raigarh POWERGRID Office and Township Area

1) Title of the Work

Design, manufacture, supply, erection, testing and commissioning of Grid Interactive

Roof top Solar PV Power Plants at Nagpur and Raigarh POWERGRID Office and
Township Area. This installation shall run in parallel to the grid (LT Bus), as a
supplement, to save on conventional energy supply from the grid during solar energy
generation from the plant.

2) Scope of Work

The Scope of work includes:

 Detailed Project Report (DPR), Design, Manufacture, Supply, Packing &
Forwarding, transportation to site in properly packed condition of all equipment,
materials and miscellaneous item required to complete the project.
 Supply, installation, testing & commissioning of grid interactive roof top Solar
PV Power Plant at following locations and its capacity. However, proposed capacity
can be increased or decreased as per the availability of rooftop area.
a) RHQ Nagpur is 148 KWp (Office – 30 KWp and Township – 118 KWp).

b) 765/400 KV Raigarh is 171 KWp (Office - 82 KWp and Township – 89

KWp).

 Comprehensive Maintenance Contract (CMC) for a period of five (5) Years from
the date of handing over of complete system which shall include preventive/routine
maintenance and Breakdown/corrective maintenance ensuring servicing &
replacement of guaranteed parts & components of Solar Power Plant including
Solar PV module.
The equipment and materials for grid interactive Solar PV Power Plant of array
capacity 319 kWp shall include but not limited to the following:
a) PV Modules (Crystalline)
b) Grid Interactive Inverters
c) Array Terminal Box
d) Module Mounting Structure and frames
e) Grid interfacing LT Panel including three phase Import/export Energy
Meter
f) Web-base remote monitoring system
g) Cable & Wires
h) Chemical Gel Earthing system including Lightning & Surge Protection
arrangement
i) Civil works for Foundation of PV Array
j) Fire Extinguisher
k) Signage ( Project Name Plate and caution as per IS)
l) Operation and Maintenance equipment tools kit

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 All relevant drawings, data sheets, technical catalogues on each piece of
equipment/devices and type test certificates along with two sets of comprehensive
user’s manual and one set Operation and maintenance format book suitably useable
for 60 months for site of installation.
Maintenance tools and tackle kits as identified by the Contractor and other associated
materials and accessories, which is necessary or usual for satisfactory and trouble-
free operation and maintenance of the above equipment.

3) Scope of Service

The item of work to be performed on all equipment and accessories shall include but
not limited to the following:
i) Receiving, unloading and transportation at site.

ii) Replacement of all damaged equipment and accessories with new one
or short supply items.

iii) Final check-up of equipment and commissioning and putting the system
into successful functional operation.

All civil works associated with the installation & commissioning of roof top PV Array
shall have to be done by the Contractor. POWERGRID will arrange for control room
and required space for installation of various items like SPV modules, LT Panels,
Inverters etc. The Contractor shall specify and submit detail GA drawing indicating
minimum space to be required for installation of indoor/outdoor equipments as well as
PV Array.
Such works, not listed in the schedule of works but required for completion of the
project shall deemed to have been included in the scope of this bid.
The Contractor shall also maintain the PV Power Systems for a period of 5 (five) years
from date of handing over of complete system. The scope of maintenance shall include
supply of spare parts within the cost of Comprehensive Maintenance Contract (CMC).
The down time of PV System should not be more than 120 hours from time of
reporting to the Contractor. In case of non-rectification of the problem after 5 days (120
hours) from reporting the complaint, POWERGRID may consider repairing/replacing
such defective system on the cost of the contractor. Notwithstanding the same,
contractor shall continue to have the responsibilities and obligations of the subject
contract.

4) Codes and Standards

All equipment and materials to be furnished under this specification shall be designed,
manufactured and tested in accordance with the latest revisions of the relevant Indian
Standard (IS)/IEC as applicable.
The electrical installation shall meet the requirement of Indian Electricity Act, and
Indian Electricity Rules as amended up-to-date and also the applicable section of the
latest revision of the relevant IS Code of Practice.

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 Material shall be as per this document of technical specification. Any left out
specification(s) (if any) shall be as per the guidelines/specification of the Off-grid SPV
scheme of the JNNSM of the MNRE, GOI / State Nodal Agency .Contractor shall fulfill
MNRE guidelines/specifications in above respect and thereby assist POWERGRID in
getting applicable Financial Assistance(s) (Central/State, as the case may be).

5) Authorized testing Laboratories/Centers

PV modules must qualify (enclose test reports/ certificate from IEC/NABL accredited
laboratory) as per relevant IEC standard. Additionally the performance of PV modules
at STC conditions must be tested and approved by one of the IEC / NABL Accredited
Testing Laboratories including Solar Energy Centre.

The BOS items / components of the SPV power plants/ systems deployed must
conform to the latest edition of IEC/ Equivalent BIS Standards/ MNRE specifications.
Test certificates / reports for the BoS items/ components can be from any of the NABL/
IEC Accredited Testing Laboratories or MNRE approved test centers.

6) Completeness of Supply

It is not the intent to specify completely herein all details of the equipment.
Nevertheless, the equipment shall be complete and operative in all aspects and shall
conform to highest standard of engineering, design and workmanship in order to suit
with installation site with optimal output.
The Contractor shall supply all brand new equipment and accessories as specified
herein.
Contractor shall inform POWERGRID prior to material dispatch to site. POWERGRID
at its sole discretion may go for factory inspection prior to dispatch. Contractor shall
submit all the relevant test certificates and final test reports for various
components/material of the Solar PV System to POWERGRID before dispatch.

7) Solar PV Modules
Desired specification of Roof top Solar PV module shall include but not limited to the
following:
 Cell of the Modules shall be mono or poly crystalline high power silicon cells.
The solar cells shall have surface anti-reflective coating to help to absorb more
light in all weather conditions
 PV module capacity shall be minimum of 315Wp nominal rating.
 The PV modules must qualify the latest edition of relevant IEC 61215 or IS
14286. The module shall also qualify for IEC 61730 for safety qualification: Part 1-
requirement for construction and Part-2 requirements for testing,.
 Photo Electric conversion efficiency of SPV module shall not be less than
14.5%
 Fill factor of the module shall not be less than 0.7
 Each module shall have superior light transmission, low iron, tampered &
textured glass with anti reflective coating. It shall also have tough multi-layered

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 polymer back sheet for environmental protection against moisture & provide high
voltage electrical insulation.
 Solar PV module shall be highly reliable, light weight and shall have a service
life of more than 25 years
 The rated output of any supplied module shall not vary by more than 3% from
average power rating of all ratings. Each module, therefore, has to be tested and
rating displayed.
 Use of RF Identification tag (RFID) is mandatory for all PV modules, regardless
of their capacity
 The solar modules should have suitable encapsulation & sealing arrangements
to protect the silicon cells from the environment. The encapsulation arrangement
shall ensure complete moisture proofing for the entire life of solar modules.
 Contractor must consider shading losses as per the relevant industry standard
& Practice while designing the proposed power plant.
 The bird spike shall be provided to avoid bird sitting on the solar modules at the
highest point of the array/module structure.
 The Solar PV modules are to be installed & fixed with the module mounting
structures with appropriate size nuts & bolts made with stainless steel.
 It shall perform satisfactory in relative humidity up to 95% and temperature
between 0-85 degrees. It shall be able to withstand wind gusts as per the relevant
wind code applicable for site condition.
 PV module junction box shall be IP65 protection class as per IEC 529
 PV Module shall be interconnected by MC-4 connector. The interconnection
cable of PV Module must confirm NEC standard “USE-2 or RHW-2”.
 The Contractor shall provide the sample solar PV module electrical
characteristics including current-voltage (I-V) performance curves and temperature
coefficients of power, voltage and current of the proposed PV Module (s).
 Each PV module used in this solar power project must use an RF identification
tag. The following information must be mentioned in the RFID used on each
module (Until March 2013, the RFID can be inside or outside the module laminate,
but must be able to withstand harsh environmental conditions. However from 1 st
April 2013 onwards; RFID shall be mandatorily placed inside the module laminate).

 Name of the manufacturer of PV Module

 Name of the manufacturer of Solar cells
 Month and year of the manufacture (separately for solar cells and
modules)
 Country of origin (separately for solar cells and module)
 I-V curve for the module
 Peak Wattage, Im, Vm and Fill Factor for the module
 Unique Serial No. and Model No of the module
 Date and year of obtaining IEC PV module qualification certificate
 Name of the test lab issuing IEC certificate
 Other relevant information on traceability of solar cells and module as
per ISO 9000.

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  Manufacturer of proposed PV modules must have the ISO 9001:2008 or ISO
14001 Certification for their manufacturing unit for their said manufacturing item.

Warranty of PV Module

a. Material Warranty:

Material Warranty is defined as: The manufacturer should warrant the Solar
Module(s) to be free from the defects and/or failures specified below for a period
not less than five (5) years from the date of sale to the original customer ("Customer"):

i) Defects and/or failures due to manufacturing

ii) Defects and/or failures due to materials
iii) Non-conformity to specifications due to faulty manufacturing and/or
inspection processes.

If the solar Module(s) fails to conform to this warranty, the manufacturer will
repair or replace the solar module(s), at the Owner’s sole option.

b. Performance Warranty:

 PV modules used in solar power plants/ systems must be warranted for their
output peak watt capacity, which should not be less than 90% at the end of 10
years and 80% at the end of 25 years.
If, Module(s) fail(s) to exhibit such power output in prescribed time span, the
Contractor will either deliver additional PV Module(s) to replace the missing
power output with no change in area of land used or replace the PV Module(s)
with no change in area of land used at Owner s sole option.

8) Module Mounting Structure and frames

 Entire structure shall be placed on the roof. Punching and bolting shall be
permitted only for cemented/metal roof sheet with fixing of good quality of adhesive
for avoiding water leakage. However, on concrete floor punching and bolting
permitted with placing of cement block and fixing of good quality of adhesive for
avoiding water leakage.
 The array structure shall be made of hot dip galvanized MS angles or
galvanized tubular frame. The minimum thickness of the galvanization should be at
least 80 microns
 The structure shall be designed for simple mechanical and electrical
installation. It shall support SPV modules at a given orientation, absorb and
transfer the mechanical loads to the ground or roof properly.
 The array structure shall be so designed that it will occupy minimum space
without sacrificing the output from SPV panels. The structure shall be designed to
allow easy replacement of any module & shall be in line with the site requirement.

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 Array structure shall also have tilt arrangement to adjust the plane of the array for
optimum tilt.
 The module mounting structure shall have to be designed and fabricated with
alignment & optimum tilt angle shall be calculated to provide the maximum annual
energy output. This shall be decided based on the location of array installation.
 Minimum Ground Clearance of the lowest part of the module structure should
be at least 500mm on concrete floor and No minimum clearance criteria for
cemented/metal roof sheet.
 Design drawings with material selected shall be submitted for prior approval of
POWERGRID.
 The support structure design & foundation shall be designed to withstand wind
gust as per the applicable relevant Indian wind load codes for the site conditions.
 All fasteners for supporting conduits, Nut & Bolts shall be of stainless steel,
supporting structures including module mounting structure shall have to be
adequately protected against all climatic condition
 The array structure shall be grounded properly using maintenance free earthing
kit.
 The mounting of solar modules shall be done on rooftop and entire Fabrication
of elevated structure and the structure atop sloping roofs shall be done by the
Contractor.
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9) Array foundation

The legs of the structures shall be made with hot dip GI angles or tubular supports,
which shall be fixed on RCC blocks. The base plate arrangement may be made on
RCC blocks. Grade of concrete for all RCC blocks shall be 1:2:4 mix.
While making design, due consideration will be given to weight of module assembly,
maximum wind gust as per the applicable wind load codes for the site condition (WZ4-
47 m/s). The work includes concreting, reinforcement, shuttering etc. as per direction
of POWEGRID.

10) Array Terminal Box /Array Junction Box/DCDB

 The junction boxes will have suitable cable entry points fitted with cable glands
of appropriate sizes for both incoming and out going cables
 The array combiner box shall have IP 65 protection level as per IEC 529 and
shall be made of Poly Carbonate material/FRP/ABS plastic.
 The array combiner box shall be fitted with input and output terminals, surge
suppressors and DC MCBs.
 Suitable markings shall be provided on the lugs or bus-bar for easy
identification and cable ferrules will be fitted at the cable termination points for
identification.
 The mounting of the accessories in the Combiner Box should be DIN Rail type.

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  The Junction Boxes shall have suitable arrangement for the followings:
 Combine groups of modules into independent charging sub-arrays.
 Provide arrangement for disconnection for each of the groups.
 Provide a test point for each sub-group for quick fault location.
 To provide group array isolation.
 Current carrying rating of the Junction Boxes shall be suitable with adequate
safety factor to inter connect the Solar PV array.
 The make of Junction Boxes/associated accessories like surge suppressors,
DC MCBs shall be as per acceptability of POWERGRID
The array combiner box and all of its accessories should be such that it is specifically
rated/made for the use of PV system as to be declared by the original manufacturer.
Note : Switches/Circuit Breakers/Connectors wherever used must comply to IEC
60947 Part-1,II,III/ IS 60947 Part I, II, III, EN 50521 towards General requirements
Connectors-Safety (AC/DC)

11) Grid Connected Inverter

The inverter shall be pure sine wave inverter of high efficiency. Inverters shall have
display to show its own parameters along with the parameters of PV array connected
to the Inverter. The inverter shall be compatible as On Grid Connected Mode
(Synchronization with grid). The inverter must comply with latest IEEE 1547 standard
for interfacing with grid. The proposed inverter must have test certificates / reports from
any of the NABL/ IEC Accredited Testing Laboratories or MNRE approved test centers.
Desired specification of inverter shall include but not limited to the following:

 The inverter shall be highly efficient based on Maximum Power Point Tracking
(MPPT) control with IGBT based design. MPPT must be able to extract maximum
energy from Solar array and produce 415 V, 3-ph, 50Hz AC to synchronize with the
grid through LT panels.
 MPPT controller, inverter and associated control and protection devices etc. all
shall be integrated into Inverter. MPPT voltage range shall be compatible with the
array voltage.
 Inverter shall provide 3 phase, 415+10% V, 50+3% Hz supply on AC side with
THD<3%.
 DC voltage ripple content shall not be more than 3%
 Efficiency (Maximum) of Inverter shall not be less than 96% and Euro efficiency
(weighted) shall not be less than 95%.
 Degree of protection should not be less than IP-21(in case of Indoor
placements) or IP-65 (in case of Outdoor placement) as per IEC 529
 It shall have protection features such as DC inject protection to grid as per
above IEEE standard, over voltage, under voltage, Short circuit, over temperature,
Over Current, over and under grid frequency protection and Anti islanding
protection on AC side.
 It shall have protection features such as Reverse-polarity protection, Reverse
current to PV array protection Short circuit, over voltage, under voltage protection,

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 over current on DC side. In addition to this it shall have PV array Isolation switch
(DC) & AC Isolation Switch (soft switch and manual switch).
 The system should be capable of providing all the data including that of meter
and Inverter to the central software on IEC-104 protocol. All the equipments
/hardware /software for complying to the same will be in the Contractor’s scope.
 Inverter shall be grid interactive in nature.
 Inverter shall be capable of complete automatic operation, including wake-up,
synchronization & shut down. Inverter shall have DSP control and shall operate in
sleeping mode, when there is no power connected consuming least power
consumption to the extent possible.
 Inverter shall continuously monitor the condition of the grid. In the event of grid
failure, it shall resynchronize with system in less than two (2) minutes time after the
restoration of grid or DG set.
 The Inverter shall not produce Electromagnetic interference (EMI) which may
cause malfunctioning of electronic and electrical instruments including
communication equipment, which are located within the facility in which the inverter
is housed.
 Inverter shall operate seamlessly without being effected on any power cut to
the load.
 Inverter shall conform to IEC 61683/IS 61683 standard for efficiency
measurements, IEC 60068-2(1,2,14,30)/equivalent BIS std. for environmental
testing.
 Inverter to be communicable on remote sensing. Inverter shall have facility to
display basic parameters of the system through LEDs & LCD display.

Display
 Grid Voltage & Frequency
 Export Power
 Import Power
 Cumulative Export & Import Energy

Indications
 Line Status
 Inverter under voltage/over voltage
 Inverter over load
 Inverter over temperature.

Protections
 Over voltage both at input & output
 Over current both at input & output
 Over/under grid frequency
 Over temperature
 Short circuit
 Protection against lightening
 Surge voltage induced at output due to external source.

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 Note : Switches/Circuit Breakers/Connectors wherever used must comply to IEC
60947 Part-1,II,III/ IS 60947 Part I, II, III, EN 50521 towards General requirements
Connectors-Safety (AC/DC)

12) Power Quality Requirements

(i) DC Injection into the grid: The injection of DC power into the grid shall be
avoided by using an isolation transformer or other suitable means at the output of the
inverter. It is proposed to limit DC injection within 1% of the rated current of the inverter
as per IEC 61727.

(ii) Harmonics on AC side

(a)The limits for harmonics shall preferably be as stipulated in the CEA Regulations on
grid connectivity.

(b) Voltage Unbalance-The Voltage Unbalance in the grid shall not exceed the
permissible limits.

(iii) Voltage Fluctuation

(a) The permissible limit of voltage fluctuation for step changes which may occur
repetitively is 1.5%.

(b) For occasional fluctuations other than step changes the maximum permissible
limits is 3%.

13) Web-base remote monitoring system

Data logging system may be an integrated part of Inverter or a separate unit. The data
logging system includes PV monitoring system also. The data Logger should have the
provision for recording the data associated with electrical parameters at different
stages to study performance of system as well as to study status of the system at a
particular instant. The data logger should have required transducer to monitor and
record the required system data. The data logger shall have reliable battery backup
and data storage capacity to record all sorts of data simultaneously round the clock.

Data Logger and Remote monitoring must be compatible with data logger software.
The other required accessories, hardware and compatible software shall have to be
provided as an integrated part of the system to monitor the real time data (maximum
15 minutes delay) through local server to be placed in the building at a suitable
location. The Data logger shall continuously send data to the server.
The monitoring system should have the provision of graphical representation of the
data shall include but not limited to the following:

 Monitoring of PV Array/String Power & Energy (Daily/Monthly/Energy),

Meteorological data like Insolation Temperature etc.
 Monitoring of Inverter output data like export/Import Power & energy, power
factor etc.

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 All data shall be recorded chronologically date wise. The data file should be MS
Excel/XML/or any readable form compatible to MS Office/Open office and should have
the facility of down load.

14) Grid Interfacing LT Panel

AC power output of the inverter shall be fed to the AC Distribution Board (metering
panel & isolation panel) which also houses energy meter.

All the output of Inverter shall be terminated to the AC Panel through MCCB at the
incoming bus (Inverter side). The incoming bus shall be connected to Grid Supply
through a MCCB and an Isolator. Output of AC panel shall be terminated at Office LT
Panel Bus 1 & 2 (B/B-1 & B/B-2) through separate feeders in such a manner that in the
event of non availability of one bus/feeder, Solar PV should continue to feed other
healthy bus.

Note : Switches/Circuit Breakers/Connectors wherever used must comply to IEC

60947 Part-1,II,III/ IS 60947 Part I, II, III, EN 50521 towards General requirements
Connectors-Safety (AC/DC)

15) Export Import Energy Meter

3 Ø 4 wire, 415V AC, Export Import Energy Meter (0.5 Class accuracy) of suitable
current capacity of any reputed make, acceptable to POWERGRID. Meter must be
provided with the necessary data cables. The Meter to be supplied must be tested
from any of the NABL/ BIS Accredited Testing-Calibration Laboratories. It shall also
comply with the requirements of CEA Regulations on “Installation and Operation of
Meters”. The Energy meter shall be installed at the incoming of the Grid interfacing LT
panel.

16) Cables & Wirings:

The Specification of wiring material shall include but not limited to the following:
 Rated Voltage for AC/DC cables suitable/compatible for Installation
(AC:0.6/1kV, DC:0.9/1.5kV)
 Temp. Range (–)10oC to (+)85oC.
 Will comply IEC 60227/IS 694 & IEC 60502/IS 1554 (Pt. I & Pt. 2) [General Test
and Measuring Method PVC insulated cables for working voltage up to and
including 1100 V and UV resistant for outdoor installation]
 Excellent resistance to Heat, Fire, Oil, cold, water, abrasion, UV radiation
 Flexible
i) Buried underground cables must be armored.
ii) Conductor size of cables and wires shall be selected based on efficient design
criteria such that the overall electrical energy loss in any section of cable or wire
is not more than 3% under the designed operating conditions. Also wiring size of
PV array shall be designed such that maximum voltage drop at full power from
the PV modules to Inverter should be less than 3%.
iii) Cable terminations shall be made with suitable cable lugs & sockets etc,
crimped properly and cables shall be provided with dry type compression glands
wherever they enter junction boxes/ panels/ enclosures at the entry & exit
point of the cubicles. The panels bottoms should be properly sealed to

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 prevent entry of snakes/lizard etc. inside the panel. All cables shall be
adequately supported. Outside of the terminals / panels / enclosures, shall be
protected by conduits. Cables and wire connections shall be soldered, crimp-on
type or thimble or bottle type.
iv) Only terminal cable joints shall be accepted. Cable joint to join two cable ends
shall not be accepted.
v) The cable must be laid through PVC conduit or metallic pipe on roof and indoor.
In case of using metallic pipe as conduit proper grounding of the conduit must be
done.
vi) All cable/wires shall be marked with good quality letter and number ferrules of
proper sizes so that the cables can be identified easily.
vii) All cable shall be suitable marked or coded for easy identification. Cables and
wires shall confirm to the relevant standards like IS etc.
viii) Cable tray (metallic preferably aluminum) of suitable size must be used for laying
of cable on the floor or Roof.
ix) All fasteners shall be made of Stainless steel.

17) Plant protections

a) Lightning &Over Voltage Protection

 SPV Power Plants will be provided with Lightning and Over voltage Protection
connected to proper earth mats.
 The Lightning conductors shall be provided as per Indian Standards (IS) in order to
protect the entire Solar Array yard from Lightning strikes.
 Necessary concrete foundation for holding the lighting conductor in position will be
made after giving due consideration to maximum wind speed.
 Lighting conductors shall be earthed through flats and connected to earth mats as per
applicable IS with Chemical Gel earth pits.
 The pits are provided with Masonry enclosure with cast iron cover plate having locking
arrangement, watering pipe using charcoal and salt as per IS.

b) Earthing
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 The complete Solar PV power Plant with all its accessories will be grounded, so that in
the event of a lightning strike or utility over voltage, current will find a safe path to
earth. Note that a separate grounding would be provided for this purpose, separate
from the one used for lightning conductor.
 Each Solar PV array structure shall be grounded properly as per IS standard.
 The earth conduction shall run through appropriate pipes partly buried and partly on
the surface of the control room building. The complete earthing system shall be
mechanically & electrically connected to provide independent return path to earth.

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c) Fire Extinguishing
Suitable, sufficient number of fire extinguishers for all types of fire, shall be provided at
plant location. In addition, sufficient number of fire buckets shall also be provided. The
fire fighting equipment as above shall be dispersed in a suitable and purposeful
manner.

18) Project Specific Name Plate:

Project information Signage :The Signage shall be made up of rust free steel or
equivalent materials of minimum size 3’x 2’. The Signage provide with detail of the
project as approved by POWERGRID .The signage shall be prominently embossed.

Safety Signage : Safety Signage must be provided mentioning the level and type of
voltage and symbols as per IE Rule at different position as may be required.

19) Provision for Module Cleaning

Plumbing: For cleaning of the PV Modules, plumbing work should be done in tune
with the existing pipeline, so that water is easily available near the PV modules for
cleaning the PV Modules.

Module Cleaning: Necessary equipment is to be provided to facilitate easy cleaning of

the PV Modules.

20) Handing Over

The work shall be taken over by POWERGRID upon successful completion of all tasks
to be performed at site(s) on equipment supplied, installed, erected & commissioned
by the Contractor in accordance with provision of this order. During handing over
complete project work, the Contractor shall submit the followings for considering final
payment.

i. All As-Built Drawings

ii. Detailed Engineering Document with detailed specification, schematic drawing,
circuit drawing and test results, manuals for all deliverable items, Operation,
Maintenance & Safety Instruction Manual and other information about the
project
iii. Bill of material
iv. Inventory of spares at projects site
v. Operation and maintenance manual and schedule
vi. Periodic maintenance Log Book
vii. Fact Sheets

21) Maintenance

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 The Contractor shall undertake necessary maintenance work of the Solar PV Power
Systems. Adequate measures should be taken for prevention of wear and tear of the
parts/components. Solar PV Power System is to be designed to operate with minimum
of maintenance.

The scope of maintenance work within the contract period shall include
preventive/routine maintenance activities to ensure proper functioning of solar
photovoltaic power plant as a whole as well as break down/corrective maintenance in
the event of malfunctions/breakdown, which prevent the operation of the power system
or part of it & free replacement of spares required for such maintenance in stipulated
time period.

A broad scope under preventive/routine maintenance shall include but not limited to
the following:

I. Cleaning and checking the health of SPV system

II. Regular painting if required to avoid corrosion.
III. Routine maintenance of PV Array including cleaning of modules, checking for
physical damage of PV module, tightening of electrical connections, changing
of tilt angle of module mounting structure
IV. Routine maintenance of Inverter and all other electrical Distribution Boards,
Junction Boxes, Isolating Switches, Meters
V. Checking of Earthing pit resistance and maintaining optimum level
VI. Submission of Monthly Generation Report

In case of non-rectification of the problem after 5 days (120 hours) from reporting the
complaint, POWERGRID may consider repairing/replacing such defective system on
the cost of the contractor. Notwithstanding the same, contractor shall continue to have
the responsibilities and obligations of the subject contract.

22) Declaration

Contractor need to furnish the Information required under Annexure-I to Annexure-IV.

The annexure should be furnished along with the technical document indicating
deviation from the specifications, if any. In case, there is no deviation, nil remark on
Annexure-III should be furnished.

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S.No. Information Required
Name & Address of the
1
Contractor/Contractor of the System
2 Name & Address of Purchasing Agency
3 Date of supply of the system
Details of PV Module (s) supplied in the
4
System Make (Name of the Contractor)
5 Model
6 Serial No(s)
7 Wattage of the PV Module (s) under STC
8 Warranty valid up to
9 Details of Electronics & other BOS items.
10 System Make (Name of the Contractor)
11 Model
12 Serial No(s)
13 Warranty valid up to
Designation & Address of the person to be
14 Contacted for claiming Warranty
obligations

(Signature)
Name & Designation
Name & Address of the
Contractor

Place & Date: (SEAL)

(During the warranty period State Agencies/users reserves the right to cross check the
performance of the systems with the minimum performance levels specified in the
specifications).

Date: Sign. & Seal of the

Contractor

Annexure-II

Details of Technical staff available with the company for execution of work (to be
completely filled by the Contractor)

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 S.No. Name Qualification Additional Total Remarks
Certification Experience
, (No. of years)
if any

Copies of Resumes and appropriate certifications should be attached with this

information.

If necessary, separate sheet may be used to submit the information.

Date: Sign. & Seal of the

Contractor

Annexure - III

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 DEVIATION SHEET

Any deviations offered from the terms and conditions of the Offer should be clearly specified
below in this sheet. If there are no deviations offered, it should be clearly mentioned on this

Deviation offered to Chapter No,

Clause No. of the tender document Deviation offered

Date: Sign. & Seal of the Contractor

page.

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 QUARTERLY MAINTENANCE & SERVICING REPORT

S.No. Information Required

1 DETAILS OF SOLAR PHOTOVOLTAIC SYSTEM

a Supplied by
b Date of installation

c Servicing period From : To :

2 USER PROFILE
Name and address of User:
3 TECHNICAL DETAILS
Module Capacity, make and serial number
4 CHECK OF THE PRODUCT
Correct inclination and orientation of SPV
a
panel
b Cleaning of dust from SPV panel
Interconnection of modules, charge
c
controller, battery etc
d Fuse
Inverter/PCU Reading of power
e
generation:
DIFFICULTIES IN OPERATION/
5
PROBLEM FACED BY USER

6 DIAGNOSIS DETAILS/ REPAIR ACTION:

DATE ON WHICH SYSTEM WAS LAST

7
ATTENDED:

8 REMARKS

User Name & Signature Technician’s Name & Signature

(with rubber stamp)
Date:

Date: Sign. & Seal of the Contractor

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