EQ 12/24-20


Battery Equalizer/DC Autotransformer

Model: EQ 12/24-20



This unit is an up or down voltage converter whose output is proportional to its input. It functions both ways, producing 12 V @ 20 Amps from a 24 V input or can be connected backwards to produce 24V @ 10 Amps from a 12 V input.

When connected across a 24 V battery string, it functions as a battery equalizer, allowing loads to be taken off of the 12 V battery section of a 24 V battery pack without fear of damage to the battery pack due to voltage mismatch. It also allows a 12V voltage source to be used to charge the 24V battery string.


  • >95% efficiency, typically 96% over 20% load
  • Bi-directional power flow
  • Weatherproof, NEMA 4 enclosure

Electrical Specifications

Input low side Input high side
Input Voltage (nominal battery) V 12V 24V
Output Voltage 24V 12V
Output Current 10A
Current Limited
Current Limited
Ripple at load 30mV rms 30mV rms
Efficiency >96% >96%

Mechanical Specifications


  • Weatherproof, NEMA 4 enclosure


  • 4.5″ X 2.5″ X 2″ nominal, resembling a junction box with feet

Temperature Range:

  • -40 deg C to 60 deg C
  • It is recommended, as with all electronics, that the unit not be placed in direct sunshine.


  • 6″ 12 Awg flying leads
  • Red= High Input +
  • Black= common Neg for input and output voltage
  • White= Low Input +

Wire size:

  • red, black, white: Power leads #12 AWG


  • N/A weatherproof

Note: In the interest of continuous product improvement, specifications subject to change without notice.