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ET-Solutions AG | Berhard-Wicki-Straße 5 | 80636 München

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OPERATIONS AND MAINTENANCE

COMPREHENSIVE PACKAGE

SCOPE OF WORK

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Asset Monitoring 24/7

Fault Monitoring and Reports

Production Monitoring and Report

Preventive Maintenance Execution and Report

Corrective Maintenance

Grass Cutting and Field Treatment

Module Cleaning

Spare Parts Management

Technical Advisory

Thermograpy

Insurance Management

Enviromental Advisory

Revamping and Retrofitting







Module Cleaning


Technical Advisory

Thermograpy










Module Cleaning


Technical Advisory

Thermograpy




OPTIONAL NOT INCLUDED INCLUDED


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O&M SOW – COMPREHENSIVE PACKAGE

1. INTRODUCTION

2. REMOTE ASSET MONITORING

3. PREVENTIVE MAINTENANCE

3.1 PLANNED OPERATIONS

3.1.1 PLANNED VISUAL/INSTRUMENTAL CHECKS

3.1.1.1 MODULES

3.1.1.2 INVERTERS

3.1.1.3 STATIONS

3.1.1.4 STRUCTURES

3.1.1.5 CABLINGS

3.1.1.6 MONITORING SISTEM

3.1.1.7 GROUNDING

3.1.1.8 THERMOGRAPY (optional)

3.1.2 ENVIROMENTAL OPERATIONS

3.1.2.1 MODULES CLEANING

3.1.2.2 GRASS CUTTING

3.2 REPORTING

4. CORRECTIVE MAINTEINANCE

4.1 FAULT MANAGEMENT

4.2 REACTION TIMES

4.3 REPORTING

4.4 SPARE PARTS MANAGEMENT

5. MANAGEMENT SERVICES

5.1 TECHNICAL ADVISORY (optional)

5.2 THERMOGRAPHY

5.3 INSURANCE MANAGEMENT

5.4 ENVIROMENTAL ADVISORY

5.5 REVAMPING AND RETROFITTING

INCLUDED


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1. Introduction

The present document describes ETS O&M Package to be provided to the Owner of the Plant (the

Owner)

The O&M activities are divided in:

Asset monitoring

Preventive Maintenance


Management Services

The document describes the main activities, their periodicity and the corrective maintenance reaction

time.

2. Remote Asset Monitoring

ETS will monitor activities on the Plant, its power generation, its Performance Ratio, Specific Yield, faults,

warnings and error messages. All data will be documented permanently and securely stored by the ETS

in accordance with the reasonable instructions of the Owner and will be made available to the Owner

upon request.

Significant data will include but not limited to:

a) Energy output (kWh) for each of the generation meters;

b) Plant’s Reporting Availability and Reporting Performance Ratio levels including

comparison against guaranteed values;

c) Pyranometer measured irradiation data, weather conditions from available data on

monitoring systems;

d) Inverter and string faults identified and recorded;

e) Time for both identifying the fault and rectifying the fault in accordance with Response

Times;


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f) Trends in faults;

g) All environmental and health and safety events.

Upon request from the Owner ETS can provide passwords for the Owner or any advisor appointed by

the Owner, to access and copy all data in the Remote Control System and Monitoring System.

3. Preventive Maintenance

Preventive Maintenance activities include all the activities that can be planned in advance.

3.1 Planned Operations

Planned operations activities include all the technical activities, directly related to the components of

the plant, or to the surrounding environment that can be planned in advance. The periodicity of the

preventive maintenance operations are determined by the datasheets and operational manual of the

components, the local and national technical, environmental and H&S laws and all the prescription

applicable to the plant.

ETS will operate also all the periodical activities, not determined by any of the upper condition, that are

needed to minimize the effect of the environment on the production of the plant.

3.1.1 Planned visual/instrumental checks

The planned visual/instrumental checks are strictly related to the components of the Plant. ETS will use

top market tools to check the parameters of the Plant. The Owner will be provided all the calibration

certificate of the tools. All the operative technician will be properly trained in the execution of the

operation under H&S criteria complying with local and national regulatory. This section of the O&M

SOW will examine the major activities for the main components of the Plant.

3.1.1.1 Modules

Modules planned visual/instrumental check and preventive maintenance operations include:

a) Check of the oxidation in the circuits of the photovoltaic cells;

b) Check of change of colour to yellow or brown (known as yellowing and browning) of the sealant

(EVA);

c) Deformations in the junction boxes of the module;

d) Check of the integrity of the junction boxes;


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e) Check of the tightening and of the status of the terminals of the panel-connection cables.

f) If leakage failures are detected, the affected elements shall be replaced and the terminals shall

be cleaned. It is important to take proper care of the seal of the terminal blocks, using new joints or a

silicone seal, as applicable

g) I-V curves will be measured: ETS will run random tests of strings at least once for each year in

the useful life of the Solar Park in order to confirm the proper operation and possible degradation of the

modules

3.1.1.2 Inverters

Inverters planned visual/instrumental check and preventive maintenance operations include:

a) General observation of the condition and operation of the inverter.

b) Check of the cabling and the connection of the components.

c) Verification that the area in which the inverter is located is clean, dry, well ventilated, and

properly air conditioned.

d) Check that the inverter is operating properly and that no extraneous noises are being produced

inside it.

e) Check that the room in which the inverter is located maintains proper temperatures, so to allow

environmental operating condition compatible with Supplier indications;

f) Annual review, preferably prior to summer.

g) Cleaning or changing of the air filters, when the inverter is shut down due to a lack of solar

radiation during daylight hours.

h) Inspection and subsequent tightening of the screw joints of all of the components, when the

inverter is shut down due to a lack of solar radiation during daylight hours.

i) Check and implementation of the ventilation and cooling function at different temperatures.

j) Visual inspection of the grounding contacts and the output level control, in relation to electrical

erosion and discoloration.

k) Reading the loss and failure memory.

l) Test of the operation of the input power switch, when the inverter is shut down due to a lack of

solar radiation during daylight hours.

3.1.1.3 Stations


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Stations planned visual/instrumental check and preventive maintenance operations include:

a) Health monitoring of structures

b) Integrity of the wiring and connections, presence of rodent damage and/or similar

c) Corrosion status of supports, frames, hardware, wiring, cable and connectors

d) Status and position control (on/off) of switches and circuit breakers

e) Indicators of operation control

f) Presence of burns check

g) Cleaning of corroded parts with elimination of the material degraded.

h) Restoring corrosion protection

i) Repair small damage

j) Tightening of joints control

k) General cleaning of the structure by removing extraneous elements eventually accumulated

(soil, leaves, debris, etc.)

3.1.1.4 Structures

Structures planned visual/instrumental check and preventive maintenance operations include

a) Checking the status of corrosion of the structures

b) Checking the status of corrosion of joints (rivets, bolts, welds)

c) Control of protection against corrosion (galvanization, anodizing, painting)

d) Operating status of the structures (for cracks, fractures, cracks, deformation, collapse)

e) Operating status of junctions (loosening, breakage, deformation)

f) Cleaning of corroded parts with elimination of the material degraded.

g) Restoring corrosion protection

h) Repair small damage

i) Tightening control of joints

j) General cleaning of the structure by removing extraneous elements eventually accumulated

(soil, leaves, debris,etc)

3.1.1.5 Cablings

Cabling planned visual/instrumental check and preventive maintenance operations include

a) Integrity of the wiring and connections, presence of rodent damage and/or similar

b) Corrosion status of supports, frames, hardware, clamps & connectors

c) Status and position control (on/off) switches and circuit breakers


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d) Presence of burns check

e) Clean all contacts reachable with antioxidant spray

f) Cleaning of corroded parts with elimination of the material degraded.

g) Restoring corrosion protection

h) Repair small damage from wear and tear.

i) Replacement of electrical wiring in case of injury to isolation, even if only suspected

j) Periodical check of the cable insulation value

3.1.1.6 Monitoring System

Monitoring planned visual/instrumental check and preventive maintenance operations include:


b) Corrosion State control all metal parts

c) Presence of burns check

d) Display control

e) Control of reading and comparison with expected values

f) Correct operation and control of the State of the lights and warning devices

3.1.1.7 Grounding

Grounding planned visual/instrumental check and preventive maintenance operations include:


b) Corrosion State control all metal parts

c) Presence of burns check

d) Periodical measures of the value of the ground resistance

3.1.1.8 Thermography (optional)

The thermograpic planned instrumental check include:

a) Periodical checks of a representative collection of plant modules;

b) Periodical check of the thermal level in the switch

c) Periodical checks of the MT Station to identify local heating

d) Periodical check of inverters connection


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3.1.2 Environmental operations

The planned environmental operations are performed to minimize the impact of biological/natural

agents on the plant.

The operations will be managed accordingly to the local/national regulatory without the usage of

polluting chemicals, scheduled so to avoid any loss of production from the plant.

3.1.2.1 Modules Cleaning

Module cleaning activity is a fundamental operation to avoid loss of efficiency from the modules.

The Module Cleaning activity will be performed with a periodicity of 2 times per year.

The module cleaning will be executed without the usage of chemicals that might result aggressive for

the modules. The period will be before summer and agreed with the Owner.

The module cleaning will be performed according to:

a) ETS will use NO soap and soft water. Hard water (with a high mineral content) can eventually

build up heavy deposits.

b) If chemical cleaning is required, ETS will use a detergent that will not damage aluminium.

3.1.2.2 Grass Cutting

Grass Cutting activity is a fundamental operation to avoid loss of efficiency from the modules.

The Grass Cutting activity will be performed with a periodicity of 2 times per year.

The module cleaning will be executed without the usage of mechanical tools where possible so to avoid

damages to the structures and the panels (high speed micro-stone glass breaking)

3.2 Reporting

The reporting periodicity and report content will be agreed with the Owner.

The report will include, at least, the:

1) Production value;

2) PR calculation;

3) General status of the plant:

4) Fault report;

5) Preventive Maintenance activities;

6) Corrective Maintenance activities;


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7) Fault analysis;

8) Next month program for O&M Preventive maintenance

9) Spare parts status

4. Corrective Maintenance

The corrective maintenance regards all the activities that cannot be planned in advance, triggered by

plant malfunctioning.

4.1 Fault Management

All the faults acknowledged trough the monitoring systems or during the plant periodical inspections,

will be promptly checked on site, according to the reaction times. An analysis of the fault causes will be

provided to the Owner. ETS will perform a statistical analysis of the fault to check recurring events. The

procedure will ensure the maximization of the MTBF (Mean Time Between failure).

4.2 Reaction Times

ETS reaction times will be limited to a maximum of 24h from the acknowledgement of the fault.

4.3 Reporting

Corrective Maintenance actions reporting will include:

a) Fault description

b) Equipment affected by the fault

c) Technical analysis of the fault

d) Reaction time

e) Action performed to maximize the MTBF

4.4 Spare Parts Management

ETS will support the Owner in the spare parts procurement activities with RFQ, technical specifications

of the warehouse, and minimum requirements for the warehouse.

A list of the spare parts to be provided to ensure the correct execution of the O&M activities will be

provided by ETS to the Owner.

ETS will periodically update the Owner on the consistency of the Spare Parts Warehouse, with a focus

on the most important components.

5. Managements Services


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The Management Services regards all the Engineering, Environmental activities related to the plant with the aim

of improving performance and minimizing the impact of the plant on the surrounding environment.

5.1 Technical Advisory (optional)

ETS will provide technical advisory to the Owner in the relationship with the grid operators and the local

and national government.

5.2 Thermograpy

ETS will provide periodical thermograpic analysis to check all potential panel/plants issues (hot spots,

cells breakdown, local hi temperatures)

5.3 Insurance Management

ETS will assist the Owner in all the warranty claims and will manage the warranty prescription

harmonizing the warranty requirements with the preventive maintenance protocols.

5.4 Environmental Advisory

By the means of top expert in environmental protection ETS will support the Owner in all the

environmental issues, minimizing the impact of the plant on the surrounding environment.

5.5 Revamping and retrofitting

ETS will support the customer in analysing all the improvement possibilities in the plant and possible

technical solutions to increase production and PR.


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ACTIVITY

Monitoring DAILY

Visual Inspections

Possible breakage of glass, it generally produces for external actions and rarely to

thermal stress caused by assembly errors

Oxidations in the circuits and welds of the PV cells, usually due to moisture in the

panel

Color change from yellow to brown (a phenomenon known as yellowing &

browning) of the EVA.

Check the tightness (water resistance)

Check the Tedlar, inflammation may be a symptom of the same hot spot in the

module (bubbles).

Check the alignment of the cells and the interconnection conductor in the panel

Deformation of the connection boxes of the module due to overheating diodes

passage (known as bypass diodes) and / or high contact resistance due to an

incorrect tightening of an electrical terminal. No shocks or deformations in the

frame.

Check possible presence of defects on modules

Check electrical connections and wiring of the panels

Check the tightness and the state of the terminals of the connecting cables of the

panels

Checking the tightness of the terminals or the state of the protections of the

terminals, depending on the panel.

In case of failure to watertight, we will proceed to the replacement of damaged

parts, and cleaning the terminals. It 'important to check the sealing of the boxes of

the terminals using as appropriate, new joints or a sealing with silicon

Visual observation of the general status and operation of the inverter.

Check the wiring and connection of components

Check the cleanliness, ventilation, air-conditioning of the inverter.

Verify the proper operation of the inverter and the absence of noises

Check that the room (if any) in which the inverter is installed maintains proper

temperatures for these equipments (-10 ° to 65 º C)

Testing of protective equipment and alarms

Verification of the absence of excessive overheating of the inverter, moisture and

infiltration

Visually check that there is no material damage

Annual Review preferably before the summer

1. Periodic measurements of efficiency

Measures will be undertaken conversion DC / AC inverter from the register

2. The preventive maintenance will be undertaken annually, also including the

measurements to ensure the optimal state of the entire system Cleaning the dust from the equipment: circuits, cabins, fans, busbars, etc. …

Cleaning the air filters when the inverter is stopped for lack of solar radiation in solar

hours.

Control and subsequent tightening of the joints of all components when the inverter

is stopped for lack of solar radiation in solar hours.

Check and execution of the function of ventilation and refrigeration distinct

temperatures

Visual inspection of the contacts ground, the plates and the control of the output

level in relation to electrical erosion and discoloration

Reading the error memory

Operation Test switch input power when the inverter is stopped for lack of solar

radiation in solar hours

Structures

Structures Check

Correct state of the foundations, checking the possible deterioration, cracks or loss

of material

Visual inspection of the state of the pins

Unions and fixing the panels to the structure loose. Clamping in line if necessary

Stability, strength and support of unions and securing the structure to ensure proper

anchoring to the ground

Elements of the structure without deformation

Absence of points oxidized, with the principles of oxidation or lack of galvanized.

Application of galvanized if necessary.

Visual inspection of the structure for signs of shock, corrosion, paint protection

status, the absence of water deposits, etc.

Annual tightening of unions to the base, locking pins

MV Cells

Cleaning metal casing of the cells

State metal casing: No excessive heat or humidity, shock, deformation, or bubbles

Proper leveling and fixing the cells

Check the level of pressure of SF6 in the cells

Presence voltage indicators for each phase of positioning of the cells

State of fixings and fasteners

State of the terminal

Check grounding of the cell to the general system of land

Visual ispections

Check that there is no leakage of oil in the sump, clamps, conduit, junction points,

sump, drain plugs, residues and sampling

No abnormal noise and temperature rise

Viewing the status of the transformer (painting and oxidation) verifying the absence

of opacity, ruts and oxides

Verify the existence and readability of the plaque showing the characteristics

Check the correct leveling and fixing the transformer

Grounding of the transformer

OPERATIONS

Measurement of the value of the phase voltages and secondary lines

General cleanliness of the transformers

Losses in LV and MV

Tightening of connections

LV Switchboards

Proper anchoring of the switchboard

Switchboard cleaning

Check of any impact, breakage or deformation

Tightness and absence of moisture. Checking Lack of moisture and condensation

inside the cabinet

Good condition of the plates and identifying elements of the framework and series

IP protection check

Plates identification of electrical hazards

Protective equipment for direct contact

Switch disconnectors or failures. State of the breaker

loose Connections

Correct state of overvoltage protection

Overheated busbar

Overheated cables

Metallic elements of the switchboard grounded (if necessary)

Presence of the opening and closing key (if necessary)

opening and closing of the door and the lock (if necessary)

Fuses in a bad state (if necessary)

The fuses will be revised every three (3) months 3 months

Cleaning solar panels 6 months

Clean inverter filter and inverter stations whenever necessary

Waste collection and disposal

Cleaning inverter stations every six (6) months

Cleaning, whenever the need arises and in any case at least 2 times a year, the

installations: the presence of nests, dust or dirt on the premises of transformation

and cabin

inverters, waste wells, excess fat in the pursuers, etc..

Half-yearly general cleaning of equipment and premises

Cleaning, at least once a month and maintenance of the weather station

Irradiance cells Cleanliness monthly

Grass cutting 2 x year

Pest and rodent control. (Quarterly apply at specific points (cable entries into

buildings, manholes and3 months

Verification of the passive safety system

Electronic devices check

LV Safety Checks

Grounding checks

Measurement of the grounding sysstem yearly

monthly

yearly

yearly

6 months

yearly

6 months

yearly

6 months

yearly

yearly

MV Switchboards

yearly

Transformers

YEARLY

PV Panels

6 months

Yearly

Inverters

August September October November December+April May June JulyPERIODICITY

January February March

Title: Annex 3 Date: 15.04.14 Classification: CONFIDENTIAL Page 1 of 3

Owners Stock of Spare Parts

Contents

1. Owners Stock of Spare Parts ....................................................................................... 2


1. Owners Stock of Spare Parts

The following spares are defined as the O&M contractors’ agreement regarding minimum stock

requirements.

Storage conditions

All spare parts will be stored according to best practice and manufacturers requirements. This includes but is not limited to the following:

No spare components should be visible from outside the park.

Electrical components should be stored within in line with manufacturer recommendations (not exposed to extremes of temp/humidity)

Framing/modules should be stored off the ground and in such a way as to minimise corrosion.

The following table provides a breakdown of the minimum stock of spare parts to be available for

the Plant.


No. Items Unit Qty Supplier

1 Generating Equipment

1.1 PV Module ET 305Wp Pcs 200 ET

1.2 Galvanized Mounting Structures excluding Foundation Set 1 table POWERWAY

1.3 Connectors Set 500 LOCAL BRAND

1.4 Combiner Boxes Set 10 CHINT

1.5 Inverter Units 1000 KW Set 1 CHINT

1.6 Inverter transformers 1250kVA, 0.315/0.315/11kV with combined ring main units Set 1 CHINT

1.7 Monitoring and communication unit Set 1 CHINT

2 Transfer station and MV Equipment

2.1 12KV High Voltage cabinets including bus coupler Set 1 CHINT

2.2 12KV MV Cabinets Set 1 CHINT

2.3 Control system AC cabinet pcs 1 CHINT

2.4 Low voltage power cabinet pcs 1 CHINT

3 Control and Protection Equipment (in transfer station)

3.2 Remote Control and GPS Set 1 CHINT

3.3 Communication cabinet (Plant) Set 1 CHINT

3.4 Protection, measuring and control devices in 12KV Cabinet Lot 1 CHINT

3.5 Fault Recording Device Set 1 CHINT

3.6 Collector for quality of Electrical Energy Set 1 CHINT

3.7 Metering panel for backup measurement of energy supplied to grid Set 1 CHINT

3.8 220V DC Load Distribution Unit with storage battery and charging device Set 1 CHINT

3.9 UPS 5 KVA for 2hours Set 1 HUALI

3.1 Weather station Set 1 LOCAL

3.11 Plant communication / network cabling Set 1 CHINT

4 Cables, Enviroment Sensor and Grounding

4.1 Solar cable 4mm2 1000Vdc m 500 ZHONGTIAN

4.7 Cable accessories Lot 1 LOCAL

PERFORMANCE GUARANTEE AND LIQUIDATED DAMAGES 1

PERFORMANCE GUARANTEE, LIQUIDATED

DAMAGES AND BONUS


1. PERFORMANCE RATIO

1.1 DEFININITION OF PERFORMANCE RATIO (PR)

With reference to the CEI EN 61724 Standard (or IEC standard 61724), the Performance Ratio of a PV Plant is used to define the overall system performance with respect to the energy production, solar resources and overall effect of system losses.

According to the above mentioned Standard, the Performance ratio of a PV plant is defined:

r

f

Y

YPR [kWh / kWp] (1)

where:

n

fP

EY [kWh / kWp] (2)

is the final PV system yield and indicates the net energy output produced by the PV arrays divided by the nameplate DC power of the installed system.

It is also intended as the number of hours that the PV plant would need to operate at its rated power to provide the same energy.

In details the above (1) and (2) are:

Yf = Equivalent hours (kWh/kWp)

E = Energy output of the PV system measured as AC output at the inverter (kWh)

Pn = total PV system power [kWp] as per sum of the total flash list power; flash list power

are evaluated at standard test condition STC (I = 1000 W/mq; , Tamb=20°C,

A.M.=1,5);

and


STC

m

rG

HY [(kWh/m2) / (kW/m2)] (3)

is the reference yield intended as the total in-plane irradiance divided by the reference irradiance G at STC conditions. It represents an equivalent number of hours at the reference irradiance G = 1kW/m² and defines the solar radiation source being a function of the location, orientation of the PV array and year-to-year weather variability;

Yr = equivalent hours in standard conditions STC;

Hm = total in-plane irradiance (kWh/m²) measured with a calibrated in-plane reference cell

(irradiance sensor) as per datasheet ;

GSTC = 1 kW/m², reference solar radiation in standard conditions STC;

For (1), (2) and (3), the Performance Ratio will be:

m

STC

n H

G

P

EPR (4)

The PR is affected by the overall losses due to:

Module temperature;

Module efficiency;

Mismatch;

Shading;

DC and AC losses;

Inverter losses;

Soiling phenomena due to shading or scattering of energy by presence of dirt, snow or other debris on the PV modules surface;

System down-time;

Overall system degradation;

Cable damages caused by rodents;


1.2 PERFORMANCE RATIO (PR) CALCULATION

With reference to (4) and being the module efficiency

mod21000 Am

W

P

where

P = module nominal power (W) as per datasheet

Amod = module surface area (m2) as per datasheet;

On the basis of (4) and the above module efficiency ,the PR can be calculated as:

mG

EPR

(5)

where:

E = Energy output of the PV system measured as AC output at the inverter (kWh)

= module efficiency

Gm = HmxAmod is the global in-plane radiance measured during the time T (kWh)

The values of E and Gm shall be evaluated with reference to the effective production time,

taking in account all system down-time days for a correspondence between input data

(radiance) and output data (energy);.

E eff = Ex

Gm,eff = Gmx

With [ = (365-n)/365] is a corrective factor that indicates the effective number of

production days with “n” equal to the total system down-time days.


In case of PV plants divided in sub-plants, the Plant PR shall be calculated as the average of the yearly PR of each sub-plant:

k

PR

PR k

k

yeartot

/ (6)

where k= number of sub-plants.

Using the formula (5), the plant PR will be evaluated for each months and the overall yearly PR is calculated as the average yearly Performance ratio.

NOTE: in case the first months is not January, than the global yearly PR will be calculated on a 12-months basis with the current months as first months.

Month G m,eff

[kWh]

Eeff [kWh]

PR [%]

January

February

…

December

Annual PR

12

12

1/

i

i

yeartot

PR

PR


2. GARANTEED PR AND YEARLY CALCULATION

2.1 GUARANTEED PR

The yearly plant performance is guaranteed if:

PRi ≥ PRG

where:

PRi = yearly PR referred to year “i”;

PRG = guaranteed PR equal to ___________ at the time of the Execution date Protocol signature;

The yearly guaranteed PRG will be adjusted according to the system degradation with the following degradation factor:

Year degradation % PRG

1 D1 PR 1

2 D2 PR 2

n Dn PR n

with

Di = total degradation at year “i” and dk the yearly degradation of the system

i

1k

ki dD (6)

PRGi= PRG,t=o (1 – Di) (7)

where:

PRGi = reference PR at year “i”;

PR G, t=0 = PR at time zero;

with the degradation factor equal to:


Year dk

1 0,0%

2 0,0%

3 Xxx%

… Xxx%

20 Xxx%

2.2 TECHNICAL CONDITIONS FOR PR CALCULATION

The PR set forth in section 1 is subject to technical, operational as well as environmental

conditions that may affect the calculation; therefore the following conditions shall be satisfied in

any time of the “calculation period”, where the calculation period is intended to be the net

production time of the year, with exclusion of all system down-time days except the ones due to

the Contractor or O&M provider fault:

The O&M provider is the only one who is allowed to do the maintenance, calibration and

cleaning services as per the instruction and O&M manual, considering the technical

specification of the suppliers.

The output energy shall be referred to the inverter’s monitoring system;

Absence of sources of shadowing that may appear after the signature of the present GC,

that are not created by the Supplier/Contractor/O&M provider and which are not under their

control.

Solar radiance on plane of array (POA) will obtained one calibrated solar cell for each plant

section, as per as executed project, with uncertainty lower than ± 3%, and the mean value

will be used for each exposition.

Punctual radiance values are obtained by radiometers with sampling interval of 15 (fifteen)

minutes. The continuous radiance value will be obtained by integration.

Unavailability periods due to grid unavailability or major forces have to be put off from

observation time window in PR evaluation.

The Beneficiary will guarantee, at the signature of the Contract, full access to available

historical data of the Remote monitoring plant System to the Contractor.


3. EXPECTED MINIMUM PRODUCTION

During the performance of the O&M service as set out in paragraph 9 (b)of the O&M contract, the

Contractor shall run the plant operation in order to guarantee the Expected Minimum Production

(the “EMP”):.

The EMP shall be deemed granted if at the year “i”,:

Ei ≥ Eexp(i) (1)

where:

E(i) is the yearly production referred to the year “i” (in kWh)

Eexp(i) is the minimum expected production (in kWh) equal to:

Eexp (i) = [Prg * Po * Hi * 0,98 * (1- Di) *(365-Ni)/365 ] / G (3)

Where

Prg is the Guaranteed Performance Ratio from the Execution date (on yearly basis)

Po is the nominal peak power of the plant (in kW) as resulting from the Flash List Data

of all the photovoltaic modules installed in the Solar Plant (Po = ∑Pi extended to the

total sum of Flash List Power)

0,98 is a coefficient that takes into account the plant availability for

scheduled/unscheduled maintenance operations

Di degradation factor at year “i” as per formula (6)

Ni is the number of days of stopping periods

Hi is the value corresponding to the irradiation in (kWh/m2) measured on site by the

irradiation sensors during the 12 month of the i-year.

G is the standard irradiance value, to 1000 W/ m2.

i number of year of life of PV plant starting from the Last Commissioning

3.1 Guaranteed Performance Conditions


Duration of the period of measure is defined as 12 (twelve) month period starting from the Effective

Date.

3.2 Stopping Periods

Stopping periods due to Force Majeure events and national grid line service unavailabiliy for

reasons not attributable to the Contractor, will not be included in the calculation of the yearly

production In this case the formula set out in paragraph 1, point 3 shall be adjusted with the

effective operation factor (eff) as below:

eff = (365-n)/365

where “n” is equal to the stopping days due to the above listed reasons.

Stopping periods during which scheduled/unscheduled maintenance are carried out pursuant

to the O&M operations are allowed for a value not higher than 2% of the total annual irradiation

onto the surface of the panels . The stopping periods are taken into account with coefficient

0,98 indicated in relevant formula of section 3.

4. PERFORMANCE LIQUIDATED DAMAGES

If the Expected Minimum Production Eexp(i) is not achieved for the relevant year, the

Contractor shall pay to the Owner the Performance Liquidated Damages for an amount

equal to:

PLDi = (Eexp(i) – Ereal(i) ) * (6TGC + TPPA)

Where:

PLDi is the Performance Liquidated Damages applicable during the year i of the Performance

Warranty period (in Euro);

Eexp (i) is the yearly expected Production (expressed in kWh) of the Plant during year i based on the

Guaranteed Performance (PRG).

Ereal- i is the real yearly Production (expressed in kWh) of the Plant during the year “i” measured at

inverters;


i relevant year of the O&M service period (accordingly, it will be 1 during the first year from Final Commissioning and 2 at the Last Commissioning, etc..);

Eng is the energy price (Eur/kWh)

5. PERFORMANCE BONUS

1. With reference to the Guaranteed Performance Ratio set forth in section 2.1 and the Performance Liquidated Damaged, if the contractor achieves, during the plant operation of a relevant year “I”, Performances Ratio (PR) values higher than the minimum guaranteed, he is granted for a Performance Bonus, calculates as follows:

PBi: α * (Ereal - Eexp (i) ) x (Eng)

Where:

PBi = is the Performance Bonus expressed in euro;

= 20% if PR [0,825 – 0,85]

= 30% if PR > 0,85

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