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IEC TS 62257-9-8
Edition 1.0 2020-06
TECHNICAL
SPECIFICATION
Renewable energy and hybrid systems for rural electrification –
Part 9-8: Integrated systems – Requirements for stand-alone renewable energy
products with power ratings less than or equal to 350 W
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IEC TS 62257-9-8
Edition 1.0 2020-06
TECHNICAL
SPECIFICATION
Renewable energy and hybrid systems for rural electrification –
Part 9-8: Integrated systems – Requirements for stand-alone renewable energy
products with power ratings less than or equal to 350 W
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-8239-7
– 2 – IEC 62257-9-8:2020 © IEC 2020
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 10
4 Test requirements . 15
4.1 General . 15
4.2 Initial testing requirements . 17
4.2.1 General . 17
4.2.2 Quality test method . 17
4.2.3 Accelerated verification method . 17
4.2.4 Pay-as-you-go targeted testing . 18
4.2.5 Product families . 19
4.2.6 Similar products . 19
4.2.7 Verification of product identicality . 20
4.2.8 Reference to other standards . 20
4.3 Recurring testing requirements . 22
4.4 Retesting of non-conforming products . 22
4.5 General testing requirements applicable to all testing pathways . 23
4.5.1 General . 23
4.5.2 Exception for accessory lights . 23
5 Quality requirements . 24
5.1 General . 24
5.2 Truth in advertising . 26
5.2.1 General . 26
5.2.2 Assessment of run time values . 27
5.2.3 Information and performance reporting requirements . 28
5.2.4 Fee-for service or pay-as-you-go (PAYG) metering requirements . 31
5.2.5 Included appliances requirements . 31
5.2.6 Assessment of ingress protection advertisements . 31
5.3 Ports requirements. 32
5.3.1 General . 32
5.3.2 Voltage converters . 33
5.3.3 Ports with multiple output voltages . 33
5.3.4 Appliance voltage compatibility requirements . 33
5.3.5 Truth-in-advertising requirements . 33
5.3.6 Functionality requirements . 34
5.4 Lumen maintenance . 37
5.5 Health and safety . 37
5.5.1 AC-DC power supply safety . 37
5.5.2 Hazardous substances . 37
5.5.3 Circuit and overload protection . 38
5.5.4 Wiring and connector safety . 38
5.5.5 Additional tests for PV modules . 38
5.5.6 Requirements for systems with large PV modules or arrays . 41
5.6 Battery requirements . 41
IEC 62257-9-8:2020 © IEC 2020 – 3 –
5.6.1 Provision of battery specification sheets . 41
5.6.2 Battery charge control . 41
5.6.3 Specific requirements for lithium-based batteries . 43
5.6.4 Battery durability . 44
5.7 Quality and durability . 44
5.7.1 General . 44
5.7.2 Physical and water ingress protection . 44
5.7.3 Drop test requirements . 47
5.7.4 Soldering and electronics quality . 49
5.7.5 Switch, gooseneck, connector, and moving parts durability . 49
5.7.6 Strain relief durability . 49
5.7.7 Outdoor cable durability (size B products only) . 49
5.7.8 PV overvoltage requirement . 50
5.7.9 Miswiring protection requirement . 51
5.7.10 Requirements specific to systems with non‑plug‑and‑play connections . 51
5.8 Consumer information . 52
5.8.1 Warranty requirements . 52
5.8.2 Date of manufacture . 53
5.8.3 User manual requirements (size B products only) . 53
5.8.4 Component replacement methods (size B products only) . 54
Annex A (normative) Testing of similar products . 55
A.1 General . 55
A.2 Guidelines . 55
A.2.1 Visual screening . 55
A.2.2 Lumen maintenance and light output . 55
A.2.3 Charge controller testing. 56
A.2.4 PV modules . 56
A.2.5 Battery durability testing . 56
A.2.6 Connector durability testing . 56
A.2.7 Battery testing, full-battery run time, solar run time, and energy service
calculations . 56
A.2.8 Miswiring protection . 57
A.2.9 Output overload . 57
A.2.10 PV overvoltage . 57
A.2.11 Assessment of DC ports . 57
A.2.12 Power consumption and charging efficiency. 57
A.2.13 Voltage range . 57
A.2.14 Changes to firmware or software . 58
Annex B (normative) Partial shading test for photovoltaic modules . 59
B.1 General . 59
B.2 Equipment requirements . 59
B.3 Test prerequisites . 60
B.4 Procedure . 60
B.5 Calculations . 62
B.6 Pass criteria . 62
B.7 Reporting . 62
Annex C (normative) Visual screening and durability tests for photovoltaic modules . 64
C.1 General . 64
C.2 Durability of markings test . 64
– 4 – IEC 62257-9-8:2020 © IEC 2020
C.2.1 Equipment requirements . 64
C.2.2
...