155 Amp - Solid State PWM Charge Controller

with High Contrast Volt and Amp Meter for Solar Panel Systems

Charge Controller Features:

  • 155A 12/24/48V Solar - PWM Charge Controller with V/A Meter
  • High amperage Solid-State PWM Solar Charge Controller.
  • 155 Amp, 12, 24 or 48 volts, with 200 amp shunt.
  • High contrast LED dual volt/amp meters with on/off switch.
  • Built in D/C Breakers. Designed for solar.
  • 12 x 10 x 6 Hoffman Box.
  • Reverse polarity, over-voltage, over-current protected.
This solid-state (no relays or solenoids) charge controller has been specifically designed for large to medium sized solar, battery based alternate energy systems of up to 150 amps (100 amps for diversion mode). With thousands of hours of R&D, this controller solves many of the issues currently unaddressed in most if not all other charge controllers. One of the most prevalent problems has been how to handle more than 60 amps of solar power without using multiple controllers. 

Most charge controllers on the market use one or two power mosfets, generally limiting their current capabilities to a range of 40-60 amps. This charge controller uses six high-power (230 amps each), in a back-to-back, parallel configuration, allowing a significant increase in total current handling capability. Our in house testing has shown that this controller can handle surges of 12,500 watts! We are unaware of any other solid-state charge controller that can come close to this level of power handling.

The SMA controller features an OLED display with very high resolution that draws very low power. This display gives all of the information about the controller, including current charge state, how much time is left in that state, any error messages, current temperature, set points (no more guessing)!

This controller has really come a long way from its inception.  It's processor has 4 times the capability of its earlier design, allowing more accuracy in keeping a steady battery voltage.  The RJ-11 jack will allow for a battery temp probe as well as remote monitoring and internet connection (coming soon!).



Some of the key feature sof this controller are:

  • High amp rating – 155 amps solar (1860 watts at 12 volts, 3720 watts at 24 volts, 7440 watts at 48 volts, with 10,000 watt surge)
  • Microprocessor controlled -- This is very important for both stability and functionality.
  • Solid-State. No relays or solenoids to wear out.
  • PWM (pulse width modulation) charging.  (Charges using pulses of varying lengths)
  • Three stage charging for better battery life.
  • Both manual and automatic (30 day) equalize function.
  • User changeable settings -- Several controllers on the market set the voltage levels, and that's that!
  • Over-current, over-voltage and overheat protection.
  • Multiple system voltage settings – Easy to set jumper allows use on 12, 24 or 48 volt systems.
  • High Contrast LED battery voltage and amperage meters.
  • On/Off switch for the meters to allow extremely low idle current.
  • Battery and charge status LEDs - Several controllers do not tell you what's going on - This one does!
  • Push to test. - Ever wonder if your controller is working OK?
  • Reverse polarity protected – This unit will not be damaged if you inadvertently reverse the inputs.
  • Steel enclosure – 12 x 10 x 6 enclosure with multiple conduit openings and cooling vents.
  • Large terminals - that can actually terminate large wire, with lugs that accept up to 2/0 wire.
  • Passive cooling systems uses aluminum cooling pipes that run the length of the unit for continuous cooling of the entire unit allowing for proper operation at high power levels.
  • Two internal 150 amp breakers with manual reset/disconnect.
  • No blocking diodes are required, the mosfets prevent reverse leakage.
  • Optional accessories include a battery temperature probe. Remote monitoring accessories will be available in the future.
Note: Continuous power handling will be reduced in hot climates or installations.

The microprocessor is the heart of the controller. The battery level is constantly checked by the microprocessor and compared to the active mode’s (Float, Bulk or Equalize) set point to determine how much (if any) current should flow into or out of the batteries. As the battery’s level of charge increases, so does the voltage of the battery (the battery’s level of charge can be determined by the voltage of the battery.) As the charge level increases the controller may use very short pulses of energy to “top off” or maintain the charge at the optimum level. These pulses of energy will be of varying lengths as required. This charging algorithm is referred to as pulse width modulation (or PWM), and when properly controlled, offers a very suitable method of charging deep cycle batteries to ensure good battery health and longevity. 

Settings are of course user changeable! By simply turning the set point potentiometers with a small screwdriver, you can quickly adjust the trip point for the float or bulk mode. (Equalize mode is about 7% higher than the bulk mode).

Four very powerful 220A mosfets are wired in parallel to insure plenty of reserve capacity above the rated 155 amps this controller.

The controller can handle surges in excess of 155 amps; however, sustained high amperage currents will cause the internally mounted breakers to trip and/or the unit to heat up rapidly causing a cool down period. It is recommended that you use the controller to control currents that will not exceed the 155 amps of solar energy under the best of charging conditions.

The enclosure is heavy gauge, solid steel, ready to mount. -- No plastic, no junk, simple and rugged.

This Hoffman pull box is perfect for terminating larger wire. It has multiple knockouts on each side of the box. The box measures 10.25" x 12.5" x 6.25". The electronics are fully isolated from the box.

Charge Controller Specifics
Application Solar Panels
Display LED Voltmeter, LED Amp Meter
Feature PWM (Pulse Width Modulation)

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12/24/48 Volt 155 Amp Solar PWM Charge Controller with Volt & Amp Meter

  • Product Code: MWC150-SMA
  • Availability: In Stock
  • $429.00
  • $398.99


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Tags: PWM, SMA, charge controller, solar