The Phocos CR series with LC display is a sophisticated solar charge regulator family with outstanding features. The LC display provides a range of important information about the solar system, such as state of charge of the battery, load current and solar charge current. Also a couple of error conditions can be displayed. The charge controller provides an increase of the battery lifetime of 20% up to 100% compared to simple on/off charge regulators. The controller adjusts itself to battery type, battery capacity and ambient temperature.