Design, Supply, Installation, Testing and Commissioning of AC Solar Roof Top Photovoltaic Power Plant ( Total 300 KW ) including all accessories and 1 Year Comprehensive Operation and Maintenance Contract at Sh Motibhai R Chudhary Sagar Sainik School, Boriyavi

deducted from the Balance 5 % payment of Total amount as per payment terms & condition.

 The supplier’s invoice shows Purchase Order No., Goods Description, Quantity, Unit price, Total

 Delivery note / Packing list * Lorry receipt.

 Manufacturer’s / Supplier’s Warranty Certificate.

 Inspection Certificate issued by the Nominated Inspection Agency, and Supplier’s Factory

inspection Report

 Certificate of origin (for imported items).

 E-Way Bills, wherever applicable

 Any other document evidencing payment of statutory levies.

3.14 Variation in Order Quantity

The order quantity may vary up to 10%, while finalizing the order and / or while execution of the

complete order.

3.15 Warranty / Guarantee

The supplier warrants that the goods and equipment supplied, installed and commissioned under the

contract are new, unused, of most recent or current models and incorporate all recent improvements

in design and materials unless provided otherwise in the contract.

The supplier further warrants that the goods supplied under this contract shall have no defect arising

from design, materials or workmanship (except in so far as the design or material is required by the

purchaser’s specifications) or from any act or omission of the supplier, that may develop under normal

use of the supplied goods in the normal conditions.

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The supplier also has to guarantee that the goods supplied shall perform satisfactorily as per the

designed / rated / installed capacity as provided for in the contract. The warranty will not cover

normal wear and tear of consumables; however, the electrical parts will be covered under warranty.

The Warranty for the Solar PV System will be as follows :5 Years warranty for: 1. Plant design and

system integrity, this covers - Structure, Cables, ACDB's and LT Panels, Solar Inverters and other

Accessories installed as a part of the Roof Top Solar PV plant. The performance of the Solar Modules

will be warranted for a duration of 25 years. This warrantee / guarantee shall remain valid after the

goods or any portion thereof have been delivered and commissioned to the destination indicated in

The purchaser shall promptly notify the supplier in writing of any claims arising under this warranty.

Upon receipt of such notice, within 48 hours, the supplier shall, at all reasonable speed, repair or

replace the defective goods or parts thereof, without cost to the purchaser.

If the supplier, having been notified, fails to remedy the defect (s) within a reasonable period, the

purchaser may proceed to take such remedial action as may be necessary, at the supplier’s risk and

expense and without any prejudice to any other rights which the purchaser may have against the

supplier under the contract.

This warrantee / guarantee shall not cover any damage/s resulting from normal wear and tear or

improper handling by the purchaser or his authorized representatives.

The supplier shall guarantee the complete installation for satisfactory performance for a minimum

period of 12 months from the date of commissioning. Any defect arising out of faulty installation or

use of substandard material or workmanship shall be rectified by the supplier at his own cost.

During warranty and comprehensive AMC duration 1 year after commissioning date the supplier shall

ensure that for Plants above 150kw a full-time technician is posted at the plant for the smooth

operation of the plant, for smaller plants collectively dedicated Technician has to be deputed for

plant maintenance, monitoring and module cleaning.

The bidder to ensure that the weekly cleaning cycle for the modules at each of the MRCSSS,Boriyavi

is achieved, during the AMC period.

Monthly maintenance/service report will have to be submitted duly certified by the purchaser’s

officer in charge for the Roof Top Solar Plant.

3.16 Performance Security

The Performance Security shall be 5% of the Contract Value as PBG from a nationalized/scheduled

bank and will remain valid for 60 days beyond the end of warrantee period of 12 months.

The proceeds of the performance security shall be payable to the purchaser (Dudhsagar Dairy) as

compensation for any loss resulting from the Supplier’s failure to complete its obligations under the

The performance security will be discharged by the Purchaser and returned to the Supplier not later

than 60 days following the date of completion of the Supplier’s performance obligations, including any

warranty obligations, under the Contract. The Performance Security shall be denominated in Indian

Rupees and shall be in one of the following forms:

 A bank guarantee issued by a Nationalized / Scheduled Bank in India and in the form provided in

the Bidding Document. Such bank guarantee shall be valid till the expiry of the warranty period.

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Format of Bank Guarantee for Performance Security

On Non – Judicial Stamp Paper of Rs. 100/-

Bank Guarantee no. Date :

This deed of guarantee made this _______ day of 20____ (Two thousand ________ ) by (Name and the

address of the Bank), hereinafter referred to as the bank, which shall unless repugnant to the context

or the meaning thereof includes its legal Engineer in-Charges, successors and assigns and Mehsana

District Co-operative Milk Producers’ Union Limited (hereinafter referred to as the DUDHSAGAR DAIRY)

which expression shall unless repugnant to the context or meaning thereof include its legal Engineer

in-Charge, successors or assigns.

Whereas the DUDHSAGAR DAIRY, / its clients has awarded a contract bearing no.

(name and the address of the party), hereinafter referred to as the supplier, for the supply,

installation, completion and the maintenance of

And whereas, the supplier has agreed to submit a performance security in the form of a bank

guarantee to the DUDHSAGAR DAIRY as per the terms and conditions of the bidding documents and

the contract which will be kept valid up to ___________ calendar months from the date of bank

guarantee (the period should be till end of Period of Maintenance). And whereas, the bank and its duly

constituted agent and officer has already read and understood the contract made between the

DUDHSAGAR DAIRY and the supplier.

In consideration of the DUDHSAGAR DAIRY having agreed to award the contract on the supplier, we

________________ (the bank), do hereby guarantee, undertake, promise and agree with the

DUDHSAGAR DAIRY, its legal Engineer in-Charges, successors and assigns that the within named (the

name of the supplier) their legal Engineer in-Charges and assignees will faithfully perform and fulfil

everything within the bidding document and the contract order on their part to be performed or

fulfilled, at the time (time being the essence of the contract) and in the manner therein provided, do

all obligations thereunder and we further undertake and guarantee to make payment to the

DUDHSAGAR DAIRY a sum of Rs._____________ (Rupees______________________________ only)

being 10% of the supply value, in case the supplier, their legal Engineer in-Charges and assignees do

not faithfully perform and fulfil everything within the bidding document and the Contract order on

their part to be performed or fulfilled, at the time and in the manner therein provided and do not

wilfully and promptly do all obligations there under.

In case, the Supplier fails to perform or fulfil the Contract as per the terms and conditions agreed upon,

the DUDHSAGAR DAIRY is entitled to demand an amount equivalent to 10% of the Supply value from

the Supplier and the demand made by DUDHSAGAR DAIRY itself will be conclusive evidence and proof

that the Supplier has failed to perform or fulfil his obligations under the Contract and neither the

Supplier nor the Bank shall be entitled to performance or fulfilment on any ground whatsoever.

We, (the name of the Bank), do hereby undertake to pay an amount equivalent 10% of the Supply

value, being the amount due and payable under this guarantee, without any demur, merely on a

demand from the DUDHSAGAR DAIRY stating that the amount claimed is due by way of non-

performance of the Contractual obligations as aforesaid to perform the said contractual commitments,

any such demand made on the Bank shall be conclusive as regards the amount due and payable by the

Bank under this guarantee. However, our liability under this guarantee shall be restricted to an amount

not exceeding Rs._______________ (Rupees_________________________ only) being the amount

equal to 10% of the Supply value.

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We, the bank, further agree that the performance security herein contained shall remain in full force

and effect for a period of ______________ calendar months from the date of the bank guarantee (the

period shall be till the end of Period of Maintenance) whichever is later or till the DUDHSAGAR DAIRY

certifies that the terms and conditions of the said contract have been fully and properly carried out by

the said Supplier and accordingly discharge the guarantee, unless a demand or a claim under this

guarantee is made on us in writing by the DUDHSAGAR DAIRY on or before ____________________

we shall be discharged from all liabilities under this performance security hereafter.

We, the bank, further agree with the DUDHSAGAR DAIRY that the DUDHSAGAR DAIRY shall have the

fullest liberty without our consent and without affecting in any manner our obligations hereunder to

very any of the terms and the conditions of the bidding document and the Contract or to extend the

time of performance by the said Supplier from time to time or postpone for any time or from time to

time and any of the power exercisable by the DUDHSAGAR DAIRY against the Supplier and to forbear

or enforce any of the terms contract and we shall not be relieved from our liability by reason of any

such variation, or extension being granted to the said supplier, or for any forbearance, act or omission

on the parts of the DUDHSAGAR DAIRY to the said supplier by any such matter or thing whatsoever

which under the law relating to sureties matter or thing whatsoever which under the law relating to

sureties would but for this provision have effect of so relieving us.

This guarantee shall be in addition to and without prejudice to any other securities or remedies which

the DUDHSAGAR DAIRY mat have or hereafter possess in respect of the works executed or intended to

be executed and the DUDHSAGAR DAIRY shall be under no obligation to marshal in favour of the bank

any such securities or funds or asset that the DUDHSAGAR DAIRY may be entitled to receive or have a

claim upon and the DUDHSAGAR DAIRY at its absolute discretion may vary, exchange, renew, modify

or refuse to complete to enforce or assign any security or instrument.

The bank agrees that the amount hereby guaranteed shall be due and payable to the DUDHSAGAR

DAIRY serving us with a notice, requiring the payment of the amount and such notice shall be deemed

to have been served on the bank either by actual delivery thereof to the bank or by dispatch thereof to

the bank by registered post at the address of the bank.

Any notice sent to the bank at its address by registered post shall be deemed to have been duly served

on the bank notwithstanding that the notice may not fact has been delivered to the bank.

In order to give full effects to the provisions of this guarantee the bank hereby waives all rights

inconsistent with the above provisions and which the bank might otherwise as a guarantor be entitled

to claim and enforce.

We, ____________________________ , lastly undertake not to revoke this guarantee during its

currency except with the previous consent of the DUDHSAGAR DAIRY in writing and the guarantee

shall be a continuous and irrevocable guarantee up to a sum of Rs. ________________ (Rupees

_____________________). The guarantee shall remain in force until ___________________________

and unless the guarantee is renewed or a claim is preferred against the bank within three months from

the said date (the date of expiry) all rights of the DUDHSAGAR DAIRY under the guarantee shall cease

and the bank shall be released and discharged from all liabilities hereunder.

SIGNATURE PLACE DATE SEAL

NOTE: The Supplier should ensure that the seal and code no. of the signatory is put by the bankers,

before submission of the bank guarantees.

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4. Technical Specifications

A Grid Connected Solar Rooftop Photo Voltaic (SPV) power plant consists of SPV array, Module

Mounting Structure, Inverter/Power Conditioning Unit (PCU) consisting of Maximum Power Point

Tracker (MPPT), and Controls & Protections, interconnect cables and switches. PV Array is

mounted on a suitable structure. Grid connected SPV power plant is without battery and should

be designed with necessary features to supplement the grid power during daytime. Components

and parts used in the SPV power plants including the PV modules, metallic structures, cables,

junction box, switches, inverters/PCUs etc., should conform to the BIS or IEC or international

specifications, wherever such specifications are available and applicable.

The Roof Top Solar Power plant consists of following equipment’s/components.

 Solar PV modules- Tier -1 -Bifacial, of wattage not less than 580Wpk and efficiency of >=22%,

Preferred with 25 years warranty

 Grid interactive Inverter with Digital Display and Remote Monitoring System to be installed with,

Preferred Makes (Sungrow/ Solis/ Growatt, Fimer-ABB, Sungrow /SMA/Delta).

 Mounting structures- Pregalvanized; for RCC Roof and Anodized Aluminum for Metal Roof

Junction Boxes. - IP65

 LT Panel – IP65- with Energy Meter, SPD, ELR and reverse power flow breaker

 Earthing and lightening protections. - Chemical earthing to be used and separate pits with

redundancy for DC,AC & lightening protection

 IR/UV protected, Anti Rodent, XLPE Cables, pipes and accessories

 Remote Monitoring Device with Grid Synchronization with the Solar Plant

 Heavy Duty Mooting Structure For Long Life

4.2 SOLAR PHOTOVOLTAIC MODULES:

The PV modules shall be Bifacial, Tier-1 with power output of not less than 580Wpk, and efficiency >=

22% (ALMM Compliant), the test certificates for the same to be submitted for approval.

 The PV modules used must qualify to the latest 2016 edition of IEC PV module qualification test or

equivalent BIS standards Crystalline Silicon Solar Cell Modules. In addition, the modules must

conform to IEC 61730 Part-1 - requirements for construction & Part 2 – requirements for testing,

for safety qualification or equivalent IS. a) For the PV modules to be used in a highly corrosive

atmosphere throughout their lifetime, they must qualify to IEC 61701 and IEC 62716. Certificate for

module qualification from IEC or equivalent to be submitted as part of the bid offer. Self-

undertaking from manufacturer / supplier that the modules being supplied are as per above. The

IEC 62804- 2015 Potential Induced Degradation (PID) certification for solar modules will be

mandatory. It should be valid during the operational period.

 The modules of the manufacturers who have OEM and co-certification will not be considered as

qualified modules.

 Protective devices against surges at the PV module shall be provided. Low voltage drop bypass

diodes shall be provided.

 The bidder shall carefully design & accommodate requisite numbers of the modules to achieve the

rated power in his bid.

 Other general requirement for the PV modules and subsystems shall be the Following:

o The rated output power of any supplied module shall have tolerance of plus 3% or above.

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o The peak-power point voltage and the peak-power point current of any supplied module and/or

any module string (series connected modules) shall not vary by more than 2 (two) per cent from

the respective arithmetic means for all modules and/or for all module strings.

o The module shall be provided with a junction box with weatherproof lid of sealed type and IP-

o I-V curves at STC shall be provided with the module.

 The module should have the following minimum information laminated inside the module.

o Company name /logo; Model number (it should indicate the voltage and rated wattage of the

module); Serial number & Year of make.

4.2.1 Warranties:

 Material Warranty:

o 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 twenty-five (25) years from the date of

commissioning of the system.

o Defects and/or failures due to manufacturing

o Defects and/or failures due to quality of materials

o 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 Owners sole option.

 Performance Warranty:

Minimum guaranteed annual energy generation (3.5 kWh/kW/year).

4.3 Specifications for Inverter:

As SPV array produces direct current electricity, it is necessary to convert this direct current into

alternating current and adjust the voltage levels to match the grid voltage. Conversion shall be

achieved using an electronic Inverter and the associated control and protection devices. All

these components of the system are termed the “Inverter”. In addition, the inverter shall also

house MPPT (Maximum Power Point Tracker), an interface between Solar PV array & the

Inverter, to the power conditioning unit/inverter should also be GG set interactive, if necessary.

The GG synchronization should provide reactive power support to GG. Inverter output

should be compatible with the grid frequency. Typical technical features of the inverter shall be as

Specifications of Inverter

Detailed Specifications

Switching devices

The rated capacity of the inverter at 45º C shall be within 20% of the solar PV

Capacity array capacity, subject to verification of design by Inverter OEM

Microprocessor/DSP with Digital display

230V / 415V as the case may be

Nominal Voltage

Single Phase: Shall work from 185 Volts to 290 Volts; Three Phase: Shall work

from 380 Volts to 415 Volts per phase

frequency/ range

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Synchronization range

Waveform Sine Wave

Harmonics AC side total harmonic current distortion < 5%

Ripple DC voltage ripple content shall not be more than 1%.

The inverters should be tested as per IEC standards, as per the

following criteria.

 The benchmarking efficiency criteria for the Grid tied (s t r i n g inverters)

Efficiency inverter-

o At nominal voltage and full load is >96%

o For load >25% is >92% .

o No load losses should not be more than 5%.

Maximum losses in sleep mode: 2W per 5kW Maximum losses in stand-by

Degree of protection: Minimum IP-21 and 22 for indoor use and IP

Casing protection levels

certification for outdoor use

Temperature Should withstand from -10 to +50 deg Celsius

Humidity Should withstand up to 95% (relative humidity)

Operation Completely automatic including wakeup, Synchronization

A maximum power point tracker shall be integrated in the inverter to

MPPT maximize energy drawn from the array.

MPPT range must be suitable to individual array voltages in power packs.

Mains Under / Over Voltage

Over/Under grid frequency

Over temperature

Surge voltage induced at output due to external Source

Anti-Islanding (for grid synch. mode)

System Monitoring Inverter voltage & current

Parameters Mains Voltage, Current & Frequency/as per Our requirement.

PCU shall also house MPPT (Maximum Power Point Tracker), an interface

Communication interface between Solar PV array to the power conditioning unit/inverter

Communication with our existing load manager system Monitoring

Parameters as per our requirement

Power Factor Should support PF > 0.7 and < -0.7

The inverter should be tested from the MNRE approved test centers / NABL

/BIS /IEC accredited/authorized testing- calibration laboratories. In case of

Test Certificates

imported power conditioning units, these should be approved by international

 Inverter shall be capable of complete automatic operation including wake-up synchronization &

 The output of power factor of inverter is suitable for all voltage ranges or sink of reactive power;

inverter should have internal protection arrangement against any sustainable fault in feeder line

and against the lightning on feeder.

 Built-in meter and data logger to monitor plant performance through external computer shall be

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 Anti-islanding (Protection against Islanding of grid): The inverter shall have anti islanding protection

in conformity to IEEE 1547/UL 1741/ IEC 62116/IS16169 or equivalent BIS standard.

 The inverter generated harmonics, flicker, DC injection limits, Voltage Range, Frequency Range and

Anti-Islanding measures at the point of connection to the utility services should follow the latest

CEA (Technical Standards for Connectivity Distribution Generation Resources) Guidelines.

 The inverter should comply with applicable IEC/ equivalent BIS standard for efficiency

measurements and environmental tests as per standard codes IS/IEC 61683 and IEC 60068-2

(1,2,14,30)/ Equivalent BIS Std./EN50530, IEC 61727 (all clauses except clause 5.2.2). in case of

clause 5.2.2, it should withstand the over/under frequency in the range 47 to 52 Hz.

 The MPPT units environmental testing should qualify IEC 60068-2 (1, 2, 14, 30)/ Equivalent BIS std.

The junction boxes/ enclosures should be IP 65 (for outdoor)/ IP 54 (indoor) and as per IEC

specifications.

4.4 MMS (Module Mounting Structure) ARRAY STRUCTURE:

Module mounting structure (MMS) should be of anodized 6 0 6 3 - T 6 aluminum for mounting of

SPV modules at site.

MMS should be sturdy & designed to assist SPV Modules to render maximum output, both on

Metal- Trapezoidal roof Sheet and RCC Slab and able to withstand the wind velocity of a maximum of

The SPV Modules to be mounted on the Purlin using Mid Clamps & End Clamps with minimum

purlins supporting the Module.

The hardware (fasteners) used for installation of SPV Modules & MMS should be of suitable

Stainless Steel (SS 304).

The HDG / Galvalume structure for the RCC Roof should meet the following minimum specifications:

 Columns – Legs & Base Plate

• Cross sectional Length, Width, Thickness (450X450X 8) in mm

• Anchored to the Roof Slab with minimum 4 Anchor Bolts of SS-304, min length

120mm(Hilti/Wruth)

• Must Be provide Safety Check Nut of All fittings.

• Tolerance: ±5%

 Leg attached to base plate by means of welded joint & 4Nos Cleat and dowel for strength in

ballast casting

• Leg : 60 mm × 40 mm x 2.0 mm thickness

• Component Length – The length to be adjusted to ensure the minimum clearance 2100mm

from the RCC roof to the bottom of the lower end of the Solar Module.

• The minimum lateral distance between the columns should be 4Mtrs, to facilitate the easy

usage of the space underneath the Solar Modules.

• Tolerance: ±5%

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 Rafter- Members

• Rafter : 60 mm × 40 mm x 2.0 mm thickness

 Component Length – As per PV modules table designed.

 Tolerance: ±5%

 Purlin - Members

 40 mm × 40 mm × 2.0 mm thickness

 Component Length – As per PV modules table designed.

 Tolerance: ±5%

The CC foundation have to be designed based on the weight of the structure with module

and minimum wind speed of the site, i.e. 150 Km/hour. Normally, each MMS should have a

minimum of four legs grouted on pedestals of minimum size of 600X600X600 mm of M25

Concrete, finished with cement paint and curve at the base for easy flow of proper size. The

structure shall be grouted with S S - 3 0 4 fasteners min-120mm length to the Slab with

chemical sealing. The over MMS should withstand the required wind velocity of 150Kmph.

However, for M e t a l sheds CC work will not be required, instead Aluminum Structure with

EPDM Rubber and Riveting. The Proposed MMS Scheme should also withstand the Wind velocity

6. INTEGRATION OF PV POWER WITH GRID:

 The output power from SPV would be fed to the inverters which convert DC produced by SPV

array to AC and feeds it into the main plant electricity grid after synchronization.

 The solar generation meter and Bi-directional meter along with CT/PT (if required) with Surge

Protection Device (SPD) should be of 0.2S accuracy class is in the scope of bidder. For LT

connection the accuracy shall be as per the requirement of DISCOMs.

 CEA guidelines for interconnecting solar power with Grid shall be followed.

 Certification of Islanding protection in the inverter from the manufacturer of the equipment

shall be mandatory. This shall be arranged by the supplier from the manufacturer.

7. JUNCTION BOXES FOR CABLES FROM SOLAR ARRAY:

The junction boxes shall be made up of FRP (Hensel or equivalent make)/PP/ABS or Powder

Coated MS with minimum 2mm thickness with minimum 3mm gland plate and dust, water and

vermin proof. It should be provided with proper locking arrangements and suited for IP-65 duty.

Series / Array Junction Box (SJB/AJB) (whichever is required): All the arrays of the modules shall

be connected to DCCB. AJB shall have terminals of bus-bar arrangement of appropriate size

Junction boxes shall have suitable cable entry with suitable glanding arrangement for both input

and output cables.

Suitable markings on the bus bars have to be provided to identify the bus bars etc. Suitable

ferrules shall also have to be provided to identify interconnections. Every AJB should have

suitable arrangement Suitable Type II SPD, suitable Isolation switches to isolate the DC input to

Inverter has to be installed in AJB for protection purpose.

Thus, AJB should have DC isolator for disconnecting the arrays from inverter input. If in any case

GPV Fuses, Type II SPDs and isolators are installed in the string inverters, then there is need to

install these again in AJB. If some of these safety gadgets are not installed in String Inverter, it

should be installed in AJB. Cable interconnection arrangement shall be within conduit pipe on

saddles installed properly. Cable connection should be done in such a manner that fault findings

if any, can be identified easily.

8. PROTECTION & SAFETY:

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Both AC & DC lines have suitable MCB/MCCB, Contractors, SPD, GPV Fuse etc to allow safe start

up and shut down before & after string inverter installed in the system. String inverters should

have protections for overload, surge current, high Temperature, over/ under voltage and over/

under frequency & reverse polarity. The complete operation process & safety instructions

should be printed on the sticker & suitably pasted on the near inverters.

Inverter should have safety measures to protect inverter from reverse short circuit current due

to lightning or line faults of distribution network.

The inverter should be suitably placed in a covered area on a suitable platform or wall mounted

or concrete platform (on rubber mat) with complete safety measure as per norms.

In case the String inverters are placed underneath the Module proper canopy will have to be

made for the same.

9. INVERTER/ARRAY SIZE RATIO:

The combined wattage of all inverters should equal to 1 times rated capacity of power plant

under STC in KW. The maximum power point tracker shall be integrated in the inverter to

maximize energy drawn from the array.

10. LT Panel - AC COMBINER BOX BOARD (ACCB):

This shall consist of box of at least cum grid interphase panel or good quality FRP/ suitable

powder coated metal casing.

Schneider / L&T or equivalent switch gear needs to be used for the supplier for the LT Panel -

Electronic Energy Meter (0.2S Class), ISI make, Three Phase duly approved by DISCOM with

appropriate CT (if required), of good quality shall have to be installed in ACCB suitable placed to

measure the power daily generated from SPV Power Plant.

SPDs & ELR shall be installed to protect feeders from the short circuit current and surges as per

the requirement of the site. Operation AC Isolator Switch of Grid Connectivity should be such

that it can be switched ON or OFF without opening the ACCB.

11.CABLES/WIRE:

All cables should be of Copper/ Aluminum braided as per IS and should be of 650V/1.1 KV grade

as per requirement. All connections should be properly made through suitable lug/terminal

crimped with use of suitable proper cable glands. The size of cables/wires should be designed

considering the line loses, maximum load on line, keeping voltage drop within permissible limit

and other related factors. The cable/wire should be of ISI/ISO mark for overhead distribution.

For normal configuration the minimum suggested sizes of cables are:

4 sq mm (single core) DC Cable, UV resistant anti Rodent-

module/Inverter/DCCB Polycab/RR /Havells Cable

MJB/DCCB to Inverter Minimum 4/6 sq. mm (single core) DC Cable, with respect to current

ratings of design, Polycab/RR /Lapp/Havells Cable

Inverter to ACCB AC Cable - Armored per design & rating, Polycab/RR

/Lapp/Havells Cable

The size & rating of the cables may vary depending on the design & capacity of SPV Power Plant.

12.CABLE TRAY & Cable Tie:

All the cables should be laid in appropriate HDG cable tray with Cover as per the requirement of

the site, No cable should be laid directly on ground or wall cable tray should be laid such that

there is gap of at least two inches above ground/roof/wall.

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For all the dressing of the cables Cable Ties need to use, and for outdoor duty SS Cable ties will

13.DISPLAY BOARD:

The bidder has to display a board at the project site mentioning the following:

 Plant Name, Capacity, Location, Type of Renewable Energy plant (solar), Date of

commissioning, details of tie-up with transmission and distribution companies, Power

generation and Export FY wise.

 The size and type of board and display shall be approved by Engineer-in-charge before site

 DANGER BOARDS: Danger boards should be provided as and where necessary as per IE Act. /IE

rules as amended up to date.

14.DC COMBINER BOARD (if required):

 DC combiner Board to receive the DC output from the array field.

 DCCB shall have sheet from enclosure of dust & vermin proof conform to IP 65 protection. The

bus bars are made of copper of desired size. Suitable capacity MCBs/MCCB shall be provided

for controlling the DC power output to the PCU along with necessary surge arrestors.

15.AC DISTRIBUTION PANEL BOARD:

 AC Distribution Panel Board (DPB) shall control the AC power from PCU/ inverter and should

have necessary surge arrestors. Interconnection from ACDB to mains at LT Bus bar while in

grid tied mode.

 All switches and the circuit breakers, connectors should conform to IEC 60947, part I, II and III/

IS60947 part I, II and III.

 The changeover switches, cabling work should be undertaken by the bidder as part of the

 All the Panel ‘s shall be metal clad, totally enclosed, rigid, floor mounted, air - insulated,

cubical type suitable for operation on three phase / single phase, 415 or 230 volts, 50 Hz

 The panels shall be designed for the minimum expected ambient temperature of 45 degrees

Celsius, 80 percent humidity and dusty weather.

 All indoor panels will have protection of IP54 or better. All outdoor panels will have protection

of IP65 or better. The switch gear should be Schneider/ L&T/ ABB.

 Should conform to Indian Electricity Act and rules (till last amendment).

 All the 415 AC or 230 volts devices / equipment like bus support insulators, circuit breakers,

SPDs, VTs etc., mounted inside the switchgear shall be suitable for continuous operation and

satisfactory performance under the following supply conditions.

Variation in supply voltage +/- 10 %

Variation in supply frequency +/- 3 Hz

16.DATA ACQUISITION SYSTEM / PLANT MONITORING

 Plant Monitoring data will be available to concerned Plant Engr. thro' e-mail & mobile.

 PV array energy production: Digital Energy Meters to log the actual value of AC/ DC voltage,

Current & Energy generated by the PV system provided. Energy meter along with CT/PT

should be of 0.2 accuracy class.

 String and array DC Voltage, Current and Power, Inverter AC output voltage and current (All

phases and lines), AC power (Active, Reactive and Apparent), Power Factor and AC energy (All

3 phases and cumulative) and frequency shall be monitored.

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MEHSANA DISTRICT CO-OPERATIVE MILK PRODUCERS’ UNION LIMITED

E-Tender Document: MDCMPUL/2026-27/098/MRCSSS/Rooftop Solar

 Software shall be provided for USB download and analysis of DC and AC parametric data for

individual plants.

 Provision for instantaneous Internet monitoring and download of historical data shall be also

 Computerized DC String/Array monitoring and AC output monitoring shall be provided as part

of the inverter and/or string/array combiner box or separately.

 Remote Server and Software for centralized Internet monitoring systems shall be also

provided for download and analysis of cumulative data of all the plants and the data of the

solar radiation and temperature monitoring system.

 The Software Subscription for the remote monitoring during the AMC period will be the

responsibility of the supplier.

 All the inverters to be looped in with the RS485 cable and integrated into the monitoring

system, for the individual inverter monitoring

 Communication RS 485 / RS 232 with our existing load manager system Monitoring

Parameters as per our requirement

17.PRIORITY FOR POWER CONSUMPTION:

Regarding the generated power consumption, in the case of string inverter, priority need to

give for internal consumption o n l y .

The system should be provided with all necessary protections like Earthing, Lightning, and grid

anti- islanding as follows:

18.1 Lightning and Over Voltage Protection:

The SPV Power Plant shall be provided with lightning and over voltage protection. The principal

aim in this protection is to reduce the over voltage to a tolerable value before it reaches the PV

or other sub-systems components. The source of over voltage can be lightning or any other

atmospheric disturbance. The Lighting Arrestor (LA) is to be made of 1¼" diameter (minimum)

and 12 feet long GI spike based on the necessary meteorological data of the location of the

projects. The necessary foundation for holding the LA is to be arranged keeping in view the wind

speed of the site and flexibility in maintenance in future. Each LA shall have to be earthed

through suitable size earth bus with earth pits. The earthing pit shall have to be made as per IS

3043. LA shall be installed to protect the array field, all machines and control panels installed in

the control rooms. Number of LA shall vary with the capacity of SPV Power Plant & location.

Number of LA should be in such a manner that total layout of solar modules should the effective

coverage of LA‟s.

18.2 Earthing Protection:

Each array structure of the PV yard shall be grounded properly. In each array every module

should be connected to each other with copper wires, lug teethed washers’ addition the

lightening arrestor/masts shall also be provided inside the array field. Provisions shall be kept for

shorting and grounding of the PV array at the time of maintenance work. All metal

casing/shielding of the plant shall be thoroughly grounded in accordance with Indian Electricity

Act/IE rules as amended up to date. The earthing pit shall be made as per IS: 3043. All the array

structures, equipments & control systems shall be compulsorily connected to the earth. Number

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MEHSANA DISTRICT CO-OPERATIVE MILK PRODUCERS’ UNION LIMITED

E-Tender Document: MDCMPUL/2026-27/098/MRCSSS/Rooftop Solar

of earthing’s shall vary with the capacity of SPV Power Plant & location. G.I. /Copper strips should

be used for earthling instead of G.I. wires. LA should be installed to protect the array field &

machines installed in the control rooms. Number of LA shall vary with the capacity of SPV Power

Plant & location. Earth resistance shall not be more than 5 ohms. It shall be ensured that all the

earthing points are bonded together to make them at the same potential.

18.3 Surge Protection:

Internal surge protection shall consist of three MOV type surge-arrestors connected

from +ve and –ve terminals to earth (via Y arrangement)

18.4 Grid Islanding:

In the event of a power failure on the electric grid, it is required that any independent power-

producing inverters attached to the grid turn off in a short period of time. This prevents the DC-

to-AC inverters from continuing to feed power into small sections of the grid, known as “islands.”

Powered islands present a risk to workers who may expect the area to be unpowered, and they

may also damage grid-tied equipment. The Rooftop PV system shall be equipped with islanding

protection. In addition to disconnection from the grid (due to islanding protection) disconnection

due to under and over voltage conditions shall also be provided.

A manual disconnect pole isolation switch beside automatic disconnection to grid would have to

be provided at utility end to isolate the grid connection by the utility personnel to carry out any

maintenance. This switch shall be locked, if required, by the utility personnel

19.DRAWINGS & MANUALS:

Two sets of Engineering, electrical drawings and Installation and O&M manuals are to be

supplied. Bidders shall provide complete technical data sheets for each equipment giving details

of the specifications along with make/makes in their bid along with basic design of the power

plant and power evacuation, synchronization along with protection equipment.

Sign and Seal of Bidder Page 22 of

MEHSANA DISTRICT CO-OPERATIVE MILK PRODUCERS’ UNION LIMITED

E-Tender Document: MDCMPUL/2026-27/098/MRCSSS/Rooftop Solar

20. Estimated power generation from 300 Kw Roof Top Solar Power Plant at Sh Motibhai R

Chudhary Sagar Sainik School,Boriyavi Locations

Bidder to submit PVSyst 7.3.1 or higher simulation results based on third-party certified PAN file

using IEC 61853-1.

Based on predictive models’ simulation estimated energy generated by 300 kW distributed at

various location solar power plant is given below in Table 1:

Table-1: The Estimated generation for the period of 10 Years

Roof Top Solar Plant Yearly Generation

Location Sh Motibhai R Chudhary Sagar Sainik

School,Boriyavi

Final documentation, as built drawings, all test certificates of bought out components, pre-

1 commissioning test report, training to client operating persons, in soft copy and hard print

All tools, tackles, lifting shifting equipment for easy, safe and faster work completion shall be

provided. All experienced and knowledgeable, manpower, supervision and Safety

Engineers shall be posted on the site. Dedicated Site engineer has to be present at the site

during the execution of the project

Security and safety of materials supplied by vendor on site sore , site office and

during installation on site.

Transit insurance of the supply materials. Insurance of materials against damage during

4 installation, testing and commissioning and all statutory compliance of contractor's

employees working on site including their insurance.

Sign and Seal of Bidder Page 23 of

MEHSANA DISTRICT CO-OPERATIVE MILK PRODUCERS’ UNION LIMITED

E-Tender Document: MDCMPUL/2026-27/098/MRCSSS/Rooftop Solar

It is available at www.tender.nprocure.com. Bidder should fill it online ONLY.

All price quoted should be FOR DUDHSAGAR DAIRY and as mentioned in the tender document.

The consolidated Price will be quoted for 300 Kw.

Price Bid for 300 KW Plant at Mehsana Union – Various Location.

Item Description Sh Motibhai R Chudhary Sagar Sainik

School,Boriyavi

Cost Of plant In Rs. Lacs

SITC Cost in Rs./ Wpk

Installation, Testing & Commissioning and others…

VENDOR WILL BE RESPONSIBLE FOR ANY ITEMS REQUIRED BUT NOT MENTIONED IN TENDER TO

COMPLETE THE SYSTEM IN WHOLE AND IT SHOULD BE INCLUDED IN THE PRICE QUOTED AND NO

SEPARATE EXTRA PRICE WILL BE ELIGIBLE AFTERWARDS.

All Statutory approval as per the requirement of UGVL will be in the scope of the Bidder, the

plant will be allowed to be charged post he UGVCL- NC/ Approval for charging the plant.

End of Tender Document ~

Sign and Seal of Bidder Page 24 of