Overview
IEC TS 62257-9-6:2008 provides practical recommendations for the selection of small Photovoltaic Individual Electrification Systems (PV‑IES) - photovoltaic home or small‑unit systems up to 500 Wp - for rural electrification projects. It proposes a simple, low‑cost selection procedure and comparative laboratory tests that can be performed locally (including in developing countries) to identify the most suitable product model for a project’s General Specification (see IEC/TS 62257‑2).
This document is a Technical Specification (guidance), not a type‑approval standard, and is intended to be used with other parts of the IEC 62257 series.
Key topics and requirements
- Scope and system boundaries: Defines PV‑IES limits (≤ 500 Wp) and what constitutes the integrated system for testing.
- System pre‑selection: Guidance on specifying services to be provided, what suppliers must declare, and pre‑selection criteria including:
- General operating conditions and design,
- Component requirements,
- Safety issues and installation rules,
- Operation, maintenance, documentation and marking.
- Comparative testing programme: A set of low‑cost tests to verify that candidate PV‑IES models can deliver the required service. Tests are designed to be run under conditions close to site reality and include:
- Initial inspection and commissioning,
- Performance under daylight‑favourable and daylight‑unfavourable conditions,
- Final inspection and conclusion.
- Service quality assessment: Use of a Service Quality Index and sample load profiles to evaluate lighting, radio/TV and refrigeration services.
- Supporting annexes: Templates and record sheets for visual inspection, commissioning, load profiles and daily service records to support reproducible local testing.
Practical applications and users
Who benefits:
- Project implementers, procurement officers and project contractors selecting PV‑IES for off‑grid rural electrification.
- Field supervisors, installers and maintenance teams needing performance criteria and commissioning checklists.
- Local testing laboratories and NGOs in developing countries seeking affordable comparative tests to verify product suitability.
- Donors and technical agencies requiring objective, repeatable selection procedures tied to a project General Specification.
Typical uses:
- Pre‑qualifying multiple supplier models before bulk procurement.
- Verifying that a system model meets project service requirements under realistic operating conditions.
- Standardizing commissioning and acceptance procedures for small PV systems.
Related standards
- IEC/TS 62257 series (general guidance for small renewable and hybrid systems for rural electrification)
- IEC/TS 62257‑2 (General Specification referenced by this part)
- IEC 62124 (PV stand‑alone systems - design verification) - related but different focus (design vs. product selection/testing)
Keywords: IEC TS 62257-9-6, PV-IES, photovoltaic individual electrification systems, rural electrification, selection procedure, comparative tests, up to 500 Wp, IEC 62257.