Charge Controller Features:
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 mosfets (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:
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.