Bsi bs en 60904 6 1995 (2003)

BRITISH STANDARD BS EN 60904 6 1995 Incorporating Amendment No 1 IEC 60904 6 1994 Photovoltaic devices — Part 6 Requirements for reference solar modules The European Standard EN 60904 6 1994, with the[.]

Incor por a ting

A men d ment No 1

1994

The Eur opean Stand r d EN6 9 4-6:19 4, with the incor poration of

amendment A1:19 8, has th e status of a BritishStand r d

Th is Br itishStan ard, ha ing

b en pre ared u der the

directionof the

Electrotech ical Sector Bo rd,

was publshed u derthe

author ity of th e Stan ards

Bo r d an comes into fect on

1 Ma 1 9

© BSI2 Apri 2 0

The folowing BSI r eferences

relate to th e work on this

stan ard:

Commit e reference E L/ 47/ 3

Draft an ou ced in

BS INewsMa 1 9

ISBN 0 5 02 0 1 8

Th e prep r ation of this BritishStand rd was entrusted b Tech ical

Commit e EPL/47, Semicond uctor , to Subcommit e EPL/47/3,

Opto lectronic Semiconductor dev ices and LCDs, upon which the fol owing

bodies were represented:

British Telecommunications plc

Federation of the Electronic Ind ustry

Ministry of Defence

National Supervising Inspectorate (BSI QA)

UK Optical Sensor Col a orativ e Association

Am endm ents is ued sinc publ cation

14 0 23 Apri 20 3 Rev ision of Clause 3

Pag e

10 A method for cal bration of reference modules a ainst a spectraly matched

1 An alternate method for the calbration of reference modules 6

Annex ZA ( normative) Other international publ cations quoted in this stand rd

with the references of the relev nt European publcations 7

National foreword

This BritishStand rd has be n prep red b S bcommit e EP /47/3 and is

theEnglsh langua e v er ion of EN6 9 4-6:19 4, Photo olta ic d evic s —

Pa r t6:R equir ements f r r efer enc sola r mod ules, including amend ment A1:19 8,

publ shed b the European Commit e for Electr otechnical Stand rdization

(CENELEC) It is identical withIEC6 9 4-6:19 4, including

amend ment1:19 8, publshed b the International Electrotechn ical Commis ion

(IEC)

Cros -referenc s

The British Stand rds which implement inter national or European publ cations

refer ed to in this document ma be foun d in the BSI Ca ta logue u d er the section

entitled “ nternational Stand rd s Cor espon dence Index”, or b using the

“ Sear h” faci ty of the B SI Electr onic Ca ta logue or of British Stand rds On line

This publ cation do s not purport to include al the neces ary prov isions of a

contract U ser are responsible for its cor ect a plcation

Compl anc with a British Standard do s not of itself c nfer immunity

f om leg al obl g ations

Summary of pag es

This document comprises a f ont cov er, an inside font cover , p gesi andi,

theEN title p ge, p ges2 to7 an d a b ck cov er

The BSI cop rig ht notice display ed in this document ind icates when the

document was last is ued

NORME EUROPÉENNE

Nov ember 19 4

Apri 19 8

ICS 3 2 0

Des riptor:Photo oltaic de ices, solar mod les, reference solar mod les, re uirements, calbration

Englsh v er sion

( includes amendment A1:19 8)

( IEC 6 9 4-6:19 4 + A1:19 8)

Dispositif photovoltạques

Partie 6: Exig ences relatives aux modules

solairesderéférence

( inclut l’amend ement A1:1 98)

( CEI60 04-6:19 4 + A1:1 98)

Photovoltais he Einrichtungen

Tei 6:Anforderungen a n Referenz-Solarmod ule

( enthält Ä nd erung A 1:19 8)

( IEC609 4-6:1 94 + A1:1 98)

This European Stand rd was a proved b CENELEC on19 4-10-0 an d

amendment A1 was a prov ed b CENEL EC on 19 8-0 -01 CENELEC

member are boun d to comply with the CEN/ CENELEC Internal Reg ulations

which stipulate the conditions for giv ing this European Stand rd the status of a

national stand rd without any alteration

Up-to-d te lsts and bibl og ra hical references concerning such national

stand rds ma be obtain ed on a pl cation to the Central Sec etariat or to any

CENELEC member

This European Stand rd exists in thre oficial v er ions ( Eng lish, French,

German) A v er ion in any other lang uag e ma e b translation un der the

responsibi ity of a CENEL EC membe into its own langua e and notified to the

Central Sec etariat has the same status as the oficial v er ions

CENELEC member are the national electrotech ical commit e s of Austria,

Belg ium, Den mark, Finland , France, Germany , Gre ce, I eland, I eland, Italy,

Luxembourg, N eth erlands, Norway , Portug l, Sp in, Sweden, Switz rland

andUnitedKing om

European Commit e for Electrotech ical Stand ardization

Comité Europé n de Nor malsation Electrotech nique

Europ is hes Komite für Elektrotech is he Normu g

Central Se retariat: rue de Stas art 3 , B- 10 0 Brus els

© 19 4 Cop r ig ht r eser v ed to CENELEC member

Ref No EN6 9 4-6:19 4 + A1:19 8E

For word

Th e text of document 82( CO)7 , as prep red b

IECTech ical Commit e 82: Solar photov oltaic

energ y systems, was submit ed to the

IEC-CENELEC p ralel v ote in Mar h19 4

Th e reference d ocument was a prov ed b

CENELEC as EN6 9 4-6 on4 October 19 4

The folowing d ates were fix ed:

Annex es d esig nated “ normativ e” are p rt of the

bod of the stand ard In this stand rd, Annex ZA is

nor mative

For word to am endm ent A1

Th e text of document 82/18 /FDIS, future

amendment 1 to IEC 6 9 4-6:19 4, prep red b

IEC TC 82, Solar photov oltaic energ y systems, was

submit ed to the IEC-CENELEC p ral el v ote and

was a proved b CENELEC as amendment A1 to

EN 6 9 4-6:19 4 on 19 8-0 -01

The folowing d ates were fix ed:

— latest d te of publcation

ofan id entical national

— latest d te of withdrawal

ofconflcting national

— latest d te b which the

amendment has to be

implemented at national

lev el b publ cation of an

id entical national stand rd

or b endor ement ( dop) 19 9-01-01

— latest d te b which the

national stand rds

confl cting with the

amendment ha e to be

1 General

1.1 Scope

This p rt of IEC6 9 4 g iv es requirements for the selection, p ckag ing , cal bration, marking , and careof

refer ence solar modules It is intended to sup lement IEC6 9 4-2

1.2 Normative r f rences

The folowing normative documents contain prov isions wh ich, throug h reference in this text, constitute

prov isions of this p rt ofIEC6 9 4.At the time of publ cation of this stand ard ,th e editions indicated were

v ld All n ormativ e d ocuments are subject to rev ision, and p rties to agre ments b sed on this p rt of

IEC6 9 4 are encouraged to inv estig te th e pos ibi ty of a ply ing the most recent editions of the

normativ e documents indicated below Member of IEC and ISO main tain register of cur ently v ald

International Stand rds

IEC6 8 1:19 7, Pr oc d ur es fr temper a tur e a nd ir r a d ia nc cor r ecton s to mea sur ed I-Vcha r a cter istc o

cr ysta l line silicon photo ol ta ic d evic s

IEC6 9 4-1:19 7, Photo ola ic d evic s — Pa r t1:Mea sur emen ts o photo ol a ic cur r ent-v lta ge

cha r a cter istc

IEC6 9 4-2:19 9, Photo ola ic d evic s — Pa r t2:R equir ements fr r efer enc sola r c ll s

IEC/ DIS82( CO)1 , Photo olaic d evic s — Pa r txx:Computa tion o spe tr a l misma tch er r or intr od uc d in

the te tng o a photo olta ic d evic ( future IEC6 9 4-x )

1)

2 Description

A reference solar module is a specialy calbr ated module which is used to measure natural or simulated

ir a iance or set simulator ir a iance lev els for measuring the per ormance of other modules hav ing

simi ar spectral response, optical characteristic , d imensions and electrical cir cuitry

3 Selection

A module selected for calbr ation as a reference module shal me t the folowing requirements:

1) its photov oltaic char acteristic shal be sta le ( se Clause9);

2) it should not contain by -p s diodes;

3) if it is ma e f om dis rete cel s, they shal be matched in short-cir uit cur ent and fi l factor

within±2%;

4) the short-cir uit cur ent of the reference module shal v ry lnearly with ir a iance ov er th e range of

inter est

The use of the reference module shal be restricted to the fol owing:

1) wh ere er or introduced due to spectral response mismatch betwe n the reference module and

testmodules (i.e mod ules to be measured using the reference module for set ing the ir a iance)

areles than±1 % The spectral mismatch er or shal be calculated ac ording to the future

stand rdIEC6 9 4-x ;

2) wh ere the dimensions, mechanical construction and electrical cir uitry of the reference module and

test modules cor espond suficiently so as to minimiz dis rep ncies due to simulator non-u iformity ,

internal reflections or temperature distribution;

3) the short-cir uit cur ent of the reference module shal v ry lnearly with ir a iance ov er th e range of

interest, as d efined in IEC 6 9 4-10

2)

1)

At pr esent at the stag e of Draft International Stan ard

2)

IE 6 9 4-1 :1 9 ,Photo oltaic d evics — Part 10: Method s of l ineariy measur ment

4 Temperatur m ea surement

Means shal be pr ovided for determining the equiv alen t cel temperature ( ECT),ac or ding to the r elev ant

IEC stand rd to a precision of± 1°C

5 Electrical connections

The electrical conn ections to the reference moduleshal be desig ned to me t the requirements of

IEC6 9 4-1

6 Cal bration

Each reference module shal be cal brated in terms of its sh ort-cir uit cur en t at stand rd test

con ditions( STC)

A method of cal brating reference modules is des ribed in Clause10

The relativ e spectral response and the temperature co ficien t of the short-cir uit cur ent of reference

mod ules ma be measured directly, or deduced f om measurements ma e on representativ e enca sulated

solar cel s as des ribed in th e relev ant IEC stand rds

7 Data sheet

Each time a reference module is calbrated , the fol owing infor mation shal be recor ded on a d ata she t:

— man facturer;

— model designation;

— ser ial n mber ;

— d te of man facture;

— ty e and d imensions of cels;

— construction and d imensions of module;

— electrical cir uit lay out;

— calbr ation org nization;

— site and d te of cal br ation;

— calbr ation meth od ( refer to r elev ant stand rds);

— primary reference cel identification;

— lg ht sour ce des ription ;

— p rameter for the determination of the equiv lent cel temperature ( se the relev ant IEC stand rd);

— relativ e spectr al response of the module or a representative enca sulated solar cel;

— temperature co ficien t of short-cir uit cur ent;

— calbration v alue of sh ort-cir uit cur en t at STC;

— estimated u certainty

8 Marking

Th e reference module shal car y a clear, ind elble serial number for c os -reference to its d ta she t

9 Car ofr f r nce m odules

The font sur ace ofthe reference module shal be kept clean and s ratch-f e It shal be protected against

d mage, contamination and degra ation A referen ce module exhibiting any defect which might imp ir its

fu ction shal not be used

Refer ence modules shal be recalbrated at least once ev ery1 months

The cal br ation of a reference module shal be c os -checked against a sta le reference module (or cel ) at

interv als of no more than thre months b comp ring their short-cir uit cur ents u d er the same

ir a iance I there is any chang e in their cur ent ratios bey ond±1 %, the mod ule( s) shal be recalbrated

I the short-cir cuit cur ent of a reference module has changed b more than5% of the initial cal br ation,

th e module shal not be used as a reference module

10 A m ethod for cal bration ofref rence m odules ag ainst a spectral y m atched

prim ary r f r nce cel

This clause des ribes a procedure for calbrating a reference module in natur al or simulated su l ght

against a primary refer ence cel whose calbration is b sed on a rad iometer or stand rd detector

conforming to the cur ent world ra iometric reference (WRR) The spectral response of the primary

reference cel, and that of the reference module to be cal brated, should match as closely as pos ible

10.1 Natural sunl g ht

Cal bration in natur al su l ght shal be car ried out u de the fol owing conditions

10.1.1 Clear, su ny weather, with the difuse ir a iance not g reater th an25% of the glob l ir a iance

10.1.2 No observ able cloud formations within a3 ° half-ang le cone sur ounding the su

10.1.3 Total ir a iance ( su +sky+g round reflection) not les than8 0W ·m

–2

, as measured b the

primary reference cel

10.1.4 Air mas betwe n AM1,25 and AM1,7

10.1.5 R adiation suficiently sta le so that the v ariation in reference cel short-cir uit cur ent is les

th an± ,5% ov er the time taken for a measurement

10.2 Sim ulator

I simulated su l ght is used, the simulato sh al be of Clas A in ac ord nce with the relev ant IEC

stand rd, with the a dition al req uiremen t that th e non-uniformity of ir a iance is les than±1 %

10.3 Test pro edure

10.3.1 Before the calbration, measure the relativ e spectral response and temperature co ficients of

short-cir uit cur ent of the reference mod ule or a representativ e enca sulated solar cel using the procedures

des ribed in the relev ant IEC stand rds

10.3.2 Mou t th e primary reference cel and the reference module co-planar and in close proximity on the

same mount Connect to the cur ent and temperature measurement instruments Adjust the mount so that

the dev ices are normal to the lg ht sour e within± °

10.3.3 Contr ol the cel temperatures of both the primary cel and the module at25°C±2 °C Where th is is

not practical, rea in g s of short-cir uit cur en ts must be subsequently cor ected to25°C in ac ord nce with

IEC 6 8 1

10.3.4 Record simultane us rea ing s of the shor t-cir uit cur rents and temperatures of both primary cel

and module

10.3.5 Repeat step10.3.4 u ti fiv e suc es iv e sets of rea ing s are obtained in which the r atio of

short-cir uit cur ents, cor ected to25°C, do s not v ry b more than±1%

10.3.6 W hen calbr ating in natur al su l ght, steps10.3.2 to 10.3.5 inclusiv e, must be per formed at least

twice a d y on at least thre sep rate d ys

10.3.7 From the ac epta le d ata, calculate the mean ratio:

10.3.8 Multiply the calbr ation v alue of the primar y reference cel b the calculated mean r atio to obtain

the cal bration v alue of the reference module

11 An alternate m ethod for the cal bration ofref rence m odules

This clause des ribes an extension of the procedure given in Clause10 for calbrating reference modules

This method el minates the requirement for close spectral response matching betwe n the primary

reference cel and the reference module, and is neces ary when no spectr al match is pos ible (such as with

new module tech ologies, or when calbrating against a precision p ranometer or an a solute ra iometer)

Th is ex ten sion is b sed on calbrating in natural or simulated su lght, measuring the spectr al ir ra iance

of the l ght sour e during the calbration, and subsequently cor ecting for any spectral mismatch betwe n

the primary reference cel and the reference module ac ording to IEC6 9 4-1

Including10.1 and10.2, this procedure, which requires an instrument to measure the relativ e spectral

ir a iance (spectrorad iometer), is the same as des ribed in10.3, with the folowing changes:

1) In step10.3.2, mount the spectr ora iomete co-planar and in close proximity to th e primary r efer ence

cel and reference module

2) Step10.3.4 has to be car ied out as fol ows:

Record simultane us rea ing s of the short-cir uit curr ents and temperatures of both primary cel and

module, and the relative spectral ir a iance of the lg ht sour e

3) Step10.3.7 has to be car ied out as fol ows:

To the ac epta le d ata, a ply the spectral mismatch cor ection factor in ac ord nce with the relev ant

IEC stand rd to the measured short-cir uit cur ent v lues of the reference module Assure the use of

cor esponding d ta sets for short-cir uit cur ent and spectral ir a iance

NOT The rang of al inte rals in the e uations of the rele ant IE stan ard should coresp n to the rang of the me sured

sp ctral ir adiance of the li ght sour e

Th e resulting short-cir uit cur en t v alue is the I

s

of the reference module at25°C

Calculate the mean r atio:

I

s

of r efer ence module at 25 °C

I

s

of primary reference cel at 25 °C

spectral y -cor ected I

s

of reference module at 25 °C

I

s

of primary reference cel at 25 °C