Owner`s manual

Warning

FIRE HAZARD

DO NOT use a dump load that is not

safely isolated from all potential sources

of combustible materials or fuels, in-

cluding wood mounting boards and hy-

drogen out-gassing from the batteries.

Put another way a dump load rated 60 amps at 30 volts is the largest that can be used. Multiple loads

can be connected in parallel as long as the sum of their individual currents does not exceed 60 amps.

Due to the PWM feature some Extra Loads may be noisy. The noise comes from the high-frequency

switching and it will only be heard when power is being delivered to the dump load.

Regulation voltage: The regulation voltage is factory preset at 28.1 VDC, which is appropriate for flood-

ed-cell lead-acid batteries. We do not recommend changing this setting unless you have a compelling

reason to do so. Improper voltage regulation settings can lead to either under-charging and shorter bat-

tery life or over-charging and shorter battery life.

If a different regulation voltage is necessary based upon the battery manufacturer’s recommendations,

the following procedure allows easy adjustment.

1. Using a multi-meter set to volts, connect the black lead to the “BAT –“ terminal, or touch the ter-

minal marked “TEST 2” on the circuit board.

2. Touch the red lead to the terminal marked “TEST 1”.

3. The multi-meter should indicate the regulation voltage divided by 10; for instance, the factory set-

ting is 28.1 VDC, so on “TEST 1” you will read 2.810 VDC.

4. To adjust, use a screwdriver to turn the trim pot labeled “R501”. To increase the regulation volt-

age, turn the pot clockwise. Check the voltage on “TEST 1” and adjust R501 until “TEST 1” reads

the desired regulation voltage divided by 10.