The IP-PECUWC50 is a a fully equipped, horizontally mounted and a single compartment kit with an additional quartz window (light input port diameter: 20 mm), water recirculation coil and black acrylic box with lid for studies in photo-based electro-catalysis such as Hydrogen Evolution Reaction (HER). Each cell is capable to hold 50 mL of electrolyte. Set-up is compatible with a power source meter or a Potentiostat / Galvanostat.