EQ 24/48-30

Battery Equalizer/DC Autotransformer

Model: EQ 24/48-30



This unit is an up or down voltage converter whose output is proportional to its input. It functions both ways, producing 24 V @ 30 Amps from a 48 V input or can be connected backwards to produce 48 V @ 15 Amps from a 12 V input.

When connected across a 48 V battery, it functions as a battery equalizer, allowing loads to be taken off of the 24 V battery section of a 48 V battery pack without fear of damage to the battery pack due to voltage mismatch. It also allows a 24V voltage source to be used to charge the 48V battery string.


  • >95% efficiency, typically 96% over 20% load
  • Bi-directional power flow
  • Weatherproof, NEMA 3R enclosure
  • Fused input and output

Electrical Specifications

Input low side Input high side
Input Voltage (nominal battery) V 24V 48V
Output Voltage 48V 24V
Output Current 15A
Current Limited
Current Limited
Ripple at load 30mV rms 30mV rms
Efficiency >96% >96%

Mechanical Specifications


  • Weatherproof, NEMA 3R enclosure


  • 12″ X 10″ X 4″ 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 AWG Eurstyle Terminal block: High, Common, Low


  • Rainproof

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