IEC TS 62257-9-5:2024
(Main)Renewable energy off-grid systems – Part 9-5: Integrated systems – Laboratory evaluation of stand-alone renewable energy products for rural electrification
Renewable energy off-grid systems – Part 9-5: Integrated systems – Laboratory evaluation of stand-alone renewable energy products for rural electrification
IEC TS 62257-9-5:2024 provides support and strategies for institutions involved in rural electrification projects. It documents technical approaches for designing, building, testing, and maintaining off-grid renewable energy and hybrid systems with AC nominal voltage below 500 V, DC nominal voltage below 750 V and nominal power below 100 kVA.
The purpose of this document is to specify laboratory test methods for evaluating the quality assurance of stand-alone renewable energy products. This document is specifically related to renewable energy products that are packaged and made available to end-use consumers at the point of purchase as single, stand-alone products that do not require additional system components to function.
This document establishes the framework for creating a product specification, the basis for evaluating quality for a particular context. Product specifications include minimum requirements for quality standards and warranty requirements.
This document applies to stand-alone renewable energy products having the following characteristics: This document was written primarily for off-grid renewable energy products with batteries and PV modules with DC system voltages not exceeding 35 V and peak power ratings not exceeding 350 W. This document includes provisions related to safety; however, it is not intended to be a comprehensive safety standard. In particular, this document is not intended to be used as an alternative to safety standards such as IEC 62368-1 or IEC 60335 (all parts) for appliances such as radios and televisions that are included with stand-alone renewable energy products
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IEC TS 62257-9-5 ®
Edition 5.0 2024-12
TECHNICAL
SPECIFICATION
Renewable energy off-grid systems –
Part 9-5: Integrated systems – Laboratory evaluation of stand-alone renewable
energy products for rural electrification
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IEC TS 62257-9-5 ®
Edition 5.0 2024-12
TECHNICAL
SPECIFICATION
Renewable energy off-grid systems –
Part 9-5: Integrated systems – Laboratory evaluation of stand-alone renewable
energy products for rural electrification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-9980-7
– 2 – IEC TS 62257-9-5:2024 IEC 2024
CONTENTS
FOREWORD . 15
INTRODUCTION . 17
1 Scope . 18
2 Normative references . 19
3 Terms and definitions . 20
4 Product components and characteristics . 26
4.1 Components . 26
4.1.1 Overview . 26
4.1.2 Component categories . 26
4.1.3 Lighting parts definitions . 29
4.1.4 Appliance definitions . 30
4.1.5 Additional system elements . 30
4.2 System measurements and observations . 31
4.2.1 General . 31
4.2.2 Product design, manufacture, and marketing aspects . 31
4.2.3 Product durability and workmanship aspects . 34
4.2.4 Lighting durability aspects . 37
4.2.5 Battery performance aspects . 38
4.2.6 PV module aspects . 39
4.2.7 Electrical characteristics . 40
4.2.8 Performance aspects . 42
4.2.9 Light output aspects . 44
4.2.10 Self-certification aspects . 45
4.3 Constructions not specifically covered . 45
5 Product specification . 46
5.1 General . 46
5.2 Applications . 46
5.3 Quality assurance principles . 47
6 Quality test method. 47
6.1 General . 47
6.2 Applications . 47
6.3 Sampling requirements . 48
6.3.1 General . 48
6.3.2 Consumer-facing product documentation . 48
6.3.3 Exceptions . 49
6.4 Laboratory requirements . 49
6.5 Testing requirements . 50
6.6 Recommended tests programme . 58
6.6.1 General . 58
6.6.2 Test preparation . 61
6.6.3 Batch A tests . 61
6.6.4 Batch B tests . 61
6.6.5 Batch C – potentially destructive tests . 62
6.6.6 Report preparation . 62
6.6.7 Failures during testing . 62
6.7 Reporting . 63
7 Renewal test method . 63
8 Market check method . 64
8.1 General . 64
8.2 Applications . 64
8.3 Sampling requirements . 64
8.4 Laboratory requirements . 65
8.5 Testing requirements . 65
8.6 Recommended tests programme . 65
8.7 Report requirements . 65
9 Initial screening method . 65
9.1 General . 65
9.2 Applications . 66
9.3 Sampling requirements . 66
9.4 Laboratory requirements . 67
9.5 Testing requirements . 67
9.6 Recommended tests programme . 67
9.7 Reporting . 67
10 Accelerated verification method . 68
10.1 General . 68
10.2 Applications . 68
10.3 Sampling requirements . 69
10.3.1 General . 69
10.3.2 Verification entry testing . 69
10.3.3 Follow-up testing . 69
10.4 Laboratory requirements . 69
10.5 Testing requirements . 69
10.5.1 General . 69
10.5.2 Verification entry testing . 70
10.5.3 Follow-up testing . 70
10.6 Recommended tests programme . 70
10.7 Report requirements . 70
11 Pay-as-you-go (PAYG) method . 71
11.1 General . 71
11.2 Applications . 71
11.3 Sampling requirements . 71
11.4 Laboratory requirements . 72
11.5 Testing requirements . 72
11.6 Recommended tests programme . 73
11.7 Reporting . 73
Annex A (normative) Photovoltaic module wiring inspection . 74
A.1 General . 74
A.2 Equipment requirements . 74
A.3 Procedure . 74
A.3.1 General . 74
A.3.2 Direct dimensional measurement . 75
A.3.3 Resistance measurement . 75
A.3.4 Determination of current-carrying capacity . 77
A.4 Pass criteria .
...
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