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Collection: PWM Charge Controllers

These work by gradually reducing (or tapering) the flow of energy into the battery as a full charge is reached so achieving a more complete charge. Very fast solid state switching technology is used for this, known as pulse width modulated (PWM) control.

  • Solar panel voltage must match battery voltage (36 cells)
  • Panel operates at battery voltage
  • Tapers charge into battery as it gets charged
  • Current into battery is limited to maximum power point current of panel
  • Low Cost
  • Simple and reliable
  • Suitable for smaller systems (<200Wp)
  • Can include load control features
  • Optional displays (built in or remote)
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15 products

  • Morningstar EcoPulse™

    Morningstar EcoPulse™

    6 models available
    From £35.00

    Morningstar's EcoPulse™ is a pulse width modulation (PWM) solar charge controller within the Morningstar Essential Series™ which provides essential off-grid battery regulation functions for solar PV systems.

  • Morningstar ProStar

    Morningstar ProStar

    3 models available
    From £124.62

    These tropicalised 15 & 30A controllers provide longer battery life and improved system performance. LED's indicate battery status and faults. Digital metering shows voltage & current plus 9 different controller status parameters. Automatic battery equalisation or can be used with sealed and gel batteries. Includes a manual PV and load disconnect button. Versions for 12V, 24V or 48V systems.

  • Morningstar SHS

    Morningstar SHS

    4 models available
    From £27.48

    These low-cost controllers are ideal for small lighting systems. High reliability with built in electronic fuses. Circuit boards are coated for protection against humidity & insects. LED's indicate battery level and system status. 12V.

  • Morningstar SunGuard

    Morningstar SunGuard


    This is the ideal controller for one-module systems. Fully encapsulated in epoxy potting, they can be mounted in battery enclosures and are weatherproof. Connection via 200mm leads.

  • Morningstar SunKeeper

    Morningstar SunKeeper

    2 models available
    From £57.86

    These are simple controllers which mount directly to the solar module junction box and eliminate the need for additional controller housing. Fully encapsulated and IP65 outdoor rated, they are approved for hazardous locations and high temperatures (up to 70°C). Connection is via flying leads. Use with sealed or vented batteries is field selectable. 12V. Bi-colour LED indicates charging, operation & faults.

  • Morningstar SunLight

    Morningstar SunLight

    3 models available
    From £73.27

    These are ideal controllers for solar powered lighting controls. Fully encapsulated. Connection is via marine rated terminals. Use with sealed or vented batteries is field selectable. Switches lights for 2 to 10 hours on, for on all night or after dusk and before dawn. Versions for use in either 12V or 24V systems, includes automatic low battery voltage disconnect (L). LED's indicate charging and load disconnect condition.

  • Morningstar SunSaver

    Morningstar SunSaver

    7 models available
    From £53.52

    These are the ideal controller for small professional and consumer systems. Fully encapsulated, they are approved for hazardous locations.

  • Morningstar SunSaver Duo Charge Controller

    Morningstar SunSaver Duo Charge Controller

    2 models available
    From £84.05

    For use with systems using two separate batteries eg boats and motorhomes. Includes remote meter to show system status and errors.

  • Morningstar TriStar

    Morningstar TriStar

    3 models available
    From £186.59

    These powerful tropicalised three-function PWM controllers provide reliable solar battery charging, load control or diversion regulation to divert excess power to a dump load for use in solar, wind or hydroelectric systems. (Two or more controllers may be used to provide multiple functions). Large heat sink enables operation at up to 45°C without de-rating. 3 LED's indicate battery status, alarms and faults. Optional LCD digital backlit display (included with -M version) provides system & controller information: battery voltage; current; temperature; amp-hours and error mode. Versions mount either on face of the controller or remotely. For use in either 12, 24 or 48V systems. Fully adjustable with DIP switches. RS232 communication for custom settings, data logging, remote monitoring/control. Reverse polarity, short circuit, over-current, high temperature and over-voltage protection. Operation from - 40 to+ 45°C. Terminals take up to 35sqmm cables.

  • Steca PR

    Steca PR

    4 models available
    From £70.43

    A range of PWM solar charge regulators rated from 10-30A, ideal for any small to medium size system which adapts automatically for use in either 12 or 24 V systems. Includes automatic low voltage disconnection and a manual load switch. Protection features include an automatically re-settable electronic fuse for maintenance free operation. Includes large self explanatory LCD display showing voltage, charge & discharge current.

  • Steca Solarix

    Steca Solarix


    PWM solar charge controllers using the latest charging technologies combined with state of charge determination to enable optimal battery charging. A large display informs the user about all operating modes with the aid of symbols. State of charge is shown as a level meter and data such as voltage, current and state of charge can be displayed digitally as figures on the display.

  • Steca Solarix 2020-x2

    Steca Solarix 2020-x2


    State-of-the-art dual battery PWM charge controller that is ideal for use in leisure applications such as boats and motor homes

  • Steca Solarix PRS

    Steca Solarix PRS

    2 models available
    From £48.86

    Simple high performance PWM solar charge controllers with modern design and a convenient LED display.

  • Steca Solsum

    Steca Solsum

    3 models available
    From £21.13

    Easy to use PWM charge controller ideal for small systems with up to 10A charge/load current.

  • Steca Tarom

    Steca Tarom

    2 models available
    From £258.82

    The Steca Tarom sets new standards in this power class. A graphic display informs the user about all important system data and enables configuration and adjustment of the controller to the specific requirements of the individual system for optimal control and battery protection.

    Integrated data logger stores all important system data which can then be read by the minute via an open Steca UART interface.
    Two additional switching contacts can be freely configured as a timer, a night light function, to start generators or as surplus management. Up to six devices can be connected in parallel and communicate with one another via the StecaLink bus.

*see manufacturer's documentation for further information