What is the water input quality requirement for the electrolyser?

The electrolyser is highly resilient to water input and can be fed with purified rainwater or tap water. Simple and cheap reverse osmosis processes with resin filters can provide the required water quality. The water input to the electrolyser needs to be desalinated and have a low conductivity. The lower the conductivity, the better. For details, please see the datasheet. It is not possible to use saltwater in the electrolyser.