TECHNICAL BID

SOLAR PHOTOVOLTAIC

SYSTEM PROPOSAL SYSTEM PROPOSAL FOR 10 kWp GRID CONNECTED SOLAR

PV SYSTEM

CUSTOMER:

P.N.G. EXPORTS,18,ESWAR NAGAR,SBI COLONY,GANDHI NAGAR,TIRUPPUR -641603

CONTENT

1. INTRODUCTION..............................................................................................................3

2. SYSTEM DESIGN.............................................................................................................6

3. SYSTEM DESCRIPTION..................................................................................................12

4. SYSTEM CONFIGURATION.............................................................................................13

5. BILL OF MATERIAL........................................................................................................18

1. INTRODUCTION

i. COMPANY PROFILE

ii. SCOPE OF WORK

With reference to scope of work SOLITAIRE shall be engaging in ENGINEERING,

PROCUREMENT & CONSTRUCTION (EPC) activities in setting up Grid connected Solar

Photovoltaic Plants, which shall include,

- System Design & Engineering

- Supply of all project related material (Such as PV modules, inverters, control panels

etc.,)

- Civil activities which shall consist of module foundation and cable trench

construction.

- Installation & commissioning of all electrical components up to grid interactive

metering panel

- Project planning & controlling

The activities that SOLITAIRE shall exclude from its scope of work are as follows:

- Area / land selection for plant set up

- Area / land preparation for module foundation construction

- Statutory and regulatory approvals from the local or relevant authorities for plant set

up and commissioning

- Facility to export electricity from the grid interactive metering panel to the nearest

sub station / public utility

- All the technical support & documentation required will be supported by SOLITAIRE.

2. SYSTEM DESIGN

i. CUSTOMER REQUIREMENT

The Customer would like to install 10 kWp Gird connected Solar Power Plant in P.N.G

EXPORTS,…TIRUPPUR……………………………..

ii. DESIGN ASSUMPTIONS

Annual average sunshine Hrs/day : 5.6 Hrs NASA data

Module Facing : True South

Module Tilt angle : 13°

Type of System : Grid Connected System

iii. PROPOSED TECHNOLOGY

The on-grid solar photovoltaic power plant to be proposed shall be consisting of Poly / Multi

crystalline solar modules with fixed tilt angle mounting systems and the solar inverters shall

be of grid interactive central type.

iv. BENEFITS OF PROPOSED TECHNOLOGY

The benefit of crystalline technology as compared to other existing technologies is as

follows;

- It occupies less area when compared to other thin film technologies

- Proven technology over years

- Abundant semiconductor materials to support high volume production and

demand.

- High volumes of production facilities throughout world

v. ENERGY SIMULATION RESULT

Based on the above inputs & assumption, an energy simulation has been carried out and the

results for the same are provided below.

UnitClimate data

location Project locationLatitude ˚N 22.3 22.3Longitude ˚E 73.2 73.2Elevation m 198 198Heating design temperature °C 17.1Cooling design temperature °C 36.9Earth temperature amplitude °C 20.1

Month Air temperatureRelative humidity

Daily solar radiation - horizontal

Atmospheric pressure Wind speed

Earth temperature

Heatingdegree-days

Coolingdegree-days

°C % kWh/m²/d kPa m/s °C °C-d °C-dJanuary 22.4 36.4% 4.68 99.1 2.1 24.7 0 385February 24.5 30.6% 5.35 99.0 2.2 28.2 0 407March 29.3 24.8% 6.19 98.8 2.3 34.6 0 599April 32.2 27.1% 6.72 98.5 2.7 38.5 0 665May 32.4 39.9% 6.69 98.2 3.3 37.7 0 694June 29.6 64.4% 5.76 98.0 3.4 32.8 0 587July 27.1 78.5% 4.50 98.0 3.1 28.8 0 531August 26.8 76.7% 4.29 98.2 2.5 28.5 0 521September 27.9 64.2% 5.03 98.4 2.2 30.0 0 537October 28.6 42.5% 5.26 98.7 1.6 30.9 0 576November 26.3 33.1% 4.76 99.1 1.7 28.4 0 490December 23.3 35.9% 4.29 99.2 1.9 24.8 0 411Annual 27.5 46.3% 5.29 98.6 2.4 30.7 0 6,402Measured at m 10.0 0.0

Incremental initial costs

Technology

Analysis type Method 1Method 2

PhotovoltaicResource assessmentSolar tracking mode FixedSlope ° 30.0Azimuth ° 0.0

Show data

MonthDaily solar radiation -

horizontalDaily solar

radiation - tiltedElectricity export

rateElectricity

exported to gridkWh/m²/d kWh/m²/d Rs/MWh MWh

January 4.68 6.17 1.222February 5.35 6.41 1.135

March 6.19 6.62 1.270April 6.72 6.41 1.181May 6.69 5.88 1.127

June 5.76 4.94 0.939July 4.50 4.00 0.802

August 4.29 4.00 0.800September 5.03 5.07 0.964

October 5.26 6.01 1.163November 4.76 6.02 1.135December 4.29 5.78 1.144Annual 5.29 5.60 0.00 12.881

Annual solar radiation - horizontal MWh/m² 1.93Annual solar radiation - tilted MWh/m² 2.04

PhotovoltaicType poly-SiPower capacity kW 7.56ManufacturerModel 36 unit(s)Efficiency % 14.3%Nominal operating cell temperature °C 45Temperature coefficient % / °C 0.40%Solar collector area m² 53Control methodMiscellaneous losses % 2.0%

InverterEfficiency % 96.0%Capacity kW 7.6Miscellaneous losses % 2.0%

SummaryCapacity factor % 19.5%Electricity delivered to load MWh 0.000Electricity exported to grid MWh 12.881

Fuel rate - proposed case power system Rs/MWh 0.00Electricity export rate Rs/MWh

Proposed case power system

See product databaseSuntech

poly-Si - STP210 - 18

Maximum power point tracker

Photovoltaic

vi. DESIGN SUMMARY

Total Installed capacity : 10 kWp

PV Module : 250Wp Crystalline Modules

Total Number of Modules : 40 Numbers

String Inverter : 11 kw

Total Number of Inverters : 1 Nos.

Approx yearly generation / MWp : 15.69 Mwh / year **

Approx Yearly generation : 15.69 MWh/annum**

Module Tilt angle :1 3 Deg

Module orientation : True South

Area required for module installation : 110 Sq.mtrs.

** Note:

1. The above values are indicative for the location based on the historical radiation data. The actual data may vary

depending on the site conditions.

vii. MODULE ARRAY LAYOUT

Based on the above design output the proposed array layout is provided below for

reference.

3. SYSTEM DESCRIPTION

i. Solar PV Grid Connected SystemA grid connected system is connected to a large independent grid (typically the public

electricity grid) and feeds power into the grid. This is a form of decentralized electricity

generation. In the case of residential or building mounted grid connected PV systems, the

electricity demand of the building is met by the PV system. Only the excess is fed into the

grid when there is an excess. The feeding of electricity into the grid requires the

transformation of DC into AC by a special, grid-controlled inverter.

A grid-tie inverter or a (GTI) is a special type of Inverter (electrical) that is used in a

renewable energy power system to convert direct current into alternating current and feed

it into the utility grid. The technical name for a grid-tie inverter is "grid-interactive inverter".

They may also be called synchronous inverters. Grid-interactive inverters typically cannot be

used in standalone applications where utility power is not available.

The Delta Grid Tie Solar Inverter is designed to convert solar electric (photovoltaic or PV)

power into utility-grade electricity that can be used by the home or sold to the local power

company. In order to operate, the inverter must have grid power available and connected.

It will not provide backup power if the AC grid fails. The inverter will automatically

synchronize itself to grid. The inverter is provided with the isolation transformer internally

with basic insulation.

4. SYSTEM CONFIGURATION

The major components of the proposed power plant are as follows:Sl. No. Item Description

1 Module Crystalline solar modules each of 250 Wp2 Structure Fixed Mounting3 Inverter String inverter of 11 kw

4 Monitoring SystemCentral Monitoring systemIrradiation/Temp Sensor

5 Junction boxDC Combiner Box (DCCB)

AC Distribution Box (ACDB)6 Cables PVC Cu Cables

7 Accessories Accessories for cable interconnection & installation kit & conduits

8 Lightning Lightning Protection Units

Solar PV Modules:

Solar cells produce direct current electricity from light, which can be used to power

equipment or to recharge a battery. Cells require protection from the environment and are

usually packaged tightly behind a glass sheet. When more power is required than a single

cell can deliver, cells are electrically connected together to form photovoltaic modules, or

solar panels. A photovoltaic module is a packaged interconnected assembly of photovoltaic

cells, which converts sunlight into electrical power. The cells are hermitically sealed

between glass and back cover (Tedlar) to protect them from harsh environments.

The detail technical specifications of both types of modules are provided below.

Technical Specifications for Crystalline ModulesOutput power – Pmax (Watts) 250 Wp +3%Voltage at Pmax 29.95 VCurrent at Pmax 8.35 AOpen-circuit voltage 37.25 VShort circuit current 8.70AMaximum system voltage (Volts) IEC: DC 1000V / UL: DC600V

Efficiency 14.29%

Type of solar PV cell Poly / Multi - Crystalline siliconSuitability For on / off grid connected systemModule output Tyco electronics plug (male and female)

Certification IEC 61215, IEC 61730, UL1703

Power warranty

25-year limited warranty on power output & 5-year product warranty

25-year performance warranty- 10 years: 90% minimum performance - 25 years: 80% minimum performance

Module Mounting Structures:

The module mounting structure is designed for holding suitable number of modules in

series. The frames and leg assemblies of the module mounting structures is of Mild Steel hot

dip galvanized of suitable sections of Angle, Channel, Tubes or any other sections

conforming to IS:2062 to meet the design criteria. All hardware considered for fastening

modules with this structure are of very good quality of Stainless Steel (SS304). The module

mounting structure is designed in such a way that it will occupy minimum space without

sacrificing the output from SPV panels at the same time it will withstand severe wind speed

up to a maximum 120 kmph.

Junction Boxes:

The junction boxes are of dust, vermin, and waterproof and made of Thermo Plastic. The

terminals will be connected to copper bus-bar arrangement of proper sizes. The junction

boxes will have suitable cable entry points fitted with cable glands of appropriate sizes for

both incoming and out going cables.

Technical Specification – Junction BoxesMaterial Thermoplastic Type Dust, Vermin & Water proofHardware SS 304Cable Gland ThermoplasticProtection IP 65

Technical Specification – Module Mounting StructuresMaterial MS Galvanized / AluminiumOverall dimension As per design

CoatingHot dip Galvanized with 80 micronthickness for MS & Anodizing for Aluminium

Wind rating 120 km/hrTilt angle Fixed angle, depends on the site latitudeFoundation PCC for roof top fixingFixing type SS 304 fasteners

Delta Grid Connect Inverter:

Monitoring System:

Monitoring systems is mainly used to monitor the performance of the Inverter, energy yield,

temperature, irradiance level etc. It provides an extremely flexible interface to facilitate PC-

based inverter monitoring and control via analog modem, GSM, Ethernet, or Internet

connections.

Industry-Leading Features and Performance:

Inverter monitoring parameters include: energy yield, power, array voltages, array

currents, AC parameters, and temperatures.

Environmental-sensor interface capabilities include: temperature, wind speed, and

light conditions.

Field-Proven Reliability:

Enhanced remote-monitoring capabilities enable the collection and analysis of

critical data needed to facilitate increased power system reliability.

Installer Friendly:

A front-mounted LCD display provides visual confirmation of all critical operating

parameters.

Compact easy-to-install package with readily-accessible electrical connections.

Unmatched Applications Flexibility:

Active alarm management capabilities with automatic delivery of SMS, e-mail, or fax

alarm messages.

Data logger and display-enabled configurations are available.

Cables:

Technical Specification – CablesType PV Insulated, sheath & UV resistanceMaterial CopperVoltage Max. 1100VTest Voltage 650V/1.1VTemperature 10 – 70 °CColour Red/ Black / Green

The size of the cables between array interconnections, array to junction boxes, junction

boxes to Charge controller etc is so selected to keep the voltage drop and losses to the

minimum.

The bright annealed 99.97% pure bare copper conductors that offer low conductor

resistance, they result in lower heating thereby increase in life and savings in power

consumption. These wires are insulated with a special grade PVC compound formulated and

manufactured in-house. The skin coloration offers high insulation resistance and long life.

Earthing & Lightning Protection:

Earthing: The array structure of the PV yard will be grounded properly using adequate

number of earthing kits. All metal casing / shielding of the plant shall be thoroughly

grounded to ensure safety of the power plant.

Lightning: The SPV Power Plant shall be provided with lightning & over voltage protection.

The main aim in this protection shall be to reduce the over voltage to a tolerable value

before it reaches the PV or other sub system components. The source of over voltage can

be lightning, atmosphere disturbances etc. Metal oxide variastors shall be provided inside

the Array Junction Boxes. In addition suitable MOV’s also shall be provided in the Inverter to

protect the inverter from over voltage.

5. BILL OF MATERIAL

The brief bill of material is provided below as ready reference.

Sl.No. Description Quantity

1 250Wp Crystalline Modules 40 Nos.

2 12 Module Mounting Structures 3 set

3 11kW String Inverter 1 No

4 Monitoring System 1 Set

5 Earthing & lightning protection 1 Set

6 Junction boxes 1 Set

7 Cables As required

8 Accessories 1 Set