Source Data for "<b>Best Practices for Measuring Performance and Stability of Indoor Photovoltaic Devices</b><b>"</b>

Indoor photovoltaics harvests energy from light available inside homes and buildings for powering the Internet of Things, wireless sensors, consumer and medical electronics. A major challenge in this field is a lack of standardized testing conditions. Here, a team from more than 50 research institutions and companies propose best practices for evaluating indoor photovoltaic performance and establishing baseline stability tests. We base these recommendations on recent experimental data, published literature, practices used in academic and industrial settings, technical specifications from standards organizations, lighting databases, and existing regulations. We outline procedures that begin with the recommendation of a single artificial light source, followed by guidance on setting up measurement systems, and a step-by-step guide for conducting measurements and tests. These procedures are consolidated into three checklists. Our aim is to promote accurate measurement of laboratory and commercial solar cells and modules under indoor lighting, facilitating comparability across academia and industry worldwide.