STECA Solsum 4040 PWM – 40A – 12/24V Charge Controller

SOLSUM-4040 – PWM Charge Controller

  • System voltage 12V (24V)
  • 480W (960W)
  • Module current 40A
  • Load current 40A
  • Weight 0.345 Kg
  • Without display


Steca Solsum – 4040 Charge Controller

Solar charge controllers Steca Solsum 2525 and 4040 are newly developed products based on our internationally renowned controller family Solarix PRS. 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. The controllers demonstrate impressive performance, are simple to use and offer unbeatable value for money.

Several LEDs in various colors give information on the battery‘s state of charge. Here, Steca’s latest algorithms are employed, resulting in optimal battery maintenance. The Steca Solsum charge controllers are equipped with an electronic fuse, thus making optimal protection possible. They operate on the serial principle and separate the solar module from the battery in order to protect it against overcharging.

For larger projects, the charge controllers can also be equipped with special functions: e.g. with night light function and selectable charging plateau and deep-discharge protection voltages.

Product features

  • Series controller
  • Automatic detection of voltage
  • Voltage regulation
  • PWM control
  • Multistage charging technology
  • Current-compensated load disconnection
  • Automatic load reconnection
  • Temperature compensation
  • Negative earthing of one or positive earthing of several terminals possible
  • Monthly maintenance charge
  • USB charge socket for smartphone and tablets.

Electronic protection functions

  • Overcharge protection
  • Deep discharge protection
  • Reverse polarity protection of module (≤36 V), 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


  • Multifunction LED display
  • Multi-coloured LED
  • 5 LEDs show operating states for operation, state of charge, fault messages


  • Evening or night light function pre-set in the factory or adjustable via Steca PA RC 100
  • Parameterisation of function values via Steca PA RC 100

Product DataSheet:  Steca Solsum 2525-4040 Product Datasheet