Solar charge controllers Steca Solarix 2525 and 4040 are newly developed products based on the internationally renowned controller family Steca PR. With increased module and load current, the controllers are now also suitable for even larger systems. The devices also feature an integrated USB charging port for charging smartphones and tablets.

Use of the latest charging technologies combined with state of charge determination enable optimal battery maintenance and module power monitoring. A large display informs the user about all operating modes with the aid of symbols. The state of charge is represented visually as a level meter. Data such as voltage, current and state of charge can also be displayed digitally as figures on the display. In addition, the controller has an energy meter which can be reset by the user.

Product features:

• Shunt topology with MOSFETs
• State of charge determination with Steca AtonIC (SOC)
• Automatic detection of voltage
• PWM control
• Multistage charging technology
• Load disconnection depending on SOC
• Automatic load reconnection
• Temperature compensation
• Negative earthing of one or positive earthing of several terminals possible
• Integrated data logger (energy meter)
• Evening, night light and daylight functions
• Integrated self test
• USB charge socket for smartphones and tablets

Electronic protection functions:

• Overcharge protection
• Deep discharge protection
• Reverse polarity protection of module, load and battery
• Automatic electronic fuse
• Short circuit protection of load and module
• Overvoltage protection at module input
• Open circuit protection without battery
• Reverse current protection at night
• Overtemperature and overload protection
• Load disconnection on battery overvoltage