Profile: Mastervolt (UK) Ltd manufactures electrotechnical systems for energy supply. Soladin 600 converts direct current, generated by the solar panels, into a standard 230 V/50 Hz electric power. It uses the electricity grid as an energy reservoir to which generated energy is sold back. In case the electricity provision is cut off, the Soladin 600 will automatically shut down. It is very compact and equipped with easily accessible 230 V and DC connections. Multi-contact connections have been included for the positive and negative connection of the PV array. The plug can be connected to a socket connection and makes the system ready to use. A clear LED indication gives information about the energy produced, the status of the system, and the soladin converter. Sunwatch 25 is a user-friendly display. It shows the amount of generated energy, the total yield as well as the benefits to the environment at a glance. With one push of a button the wireless SunWatch offers all the information on a clear display. It also stores the total kWh in case of power failure or empty batteries. It consists of of a sensor and a wireless display.