DIY Manual

59 | P a g e 10-543-1 REV A
DIY Manual
6. Follow the on-screen prompts to complete the setup.
Hard - Hardware factory restore
1. Turn the PV and battery power off to the Classic.
2. Remove the front cover.
NOTE: There are 3-4 sets of jumpers directly above the blue terminal block. For our
purpose here, we will call the left most jumper “JP1” and the right most “JP4” (actually
labeled "Boot").
3. Locate the 2 jumpers JP1 and JP4. Remove the jumpers and hold in your hand.
4. Turn the battery power on to the Classic.
5. Within 1 minute, place jumper JP4 on its two pins (vertical orientation), then place jumper
JP1 on its two pins. At this point the 3 LEDs on the top of the circuit board should flash
back and forth for between 60 and 120 seconds.
6. After the flashing stops, power down the Classic and remove JP1 and JP4; stow them back
on a single pin.
7. Put the front cover on.
8. Power up the Classic.
WHIZ BANG JR. (WBJr)
The MidNite Whiz Bang Jr is a current-sensing device that accurately measures all current into
and out of your battery bank. The WBJr calculates a precise battery bank State of Charge (SOC)
and Ending Amps to transition from the Absorb charge state to Float. In this section, we will
discuss how to 1) wire up the WBJr and 2) program the Classic and KID charge controllers to work
with the WBJr.
The WBJr is mounted on the side of a shunt. The shunt is wired in series on the electric low side,
or negative side, of your system. See Figure 17 below. The wire marked “Cable to Inverter
Negative” shows the shunt connection point for ALL negative wires from charge controllers,
inverter, wind turbine negative, and even a battery charger running off a generator. All negatives
land there. The other shunt bolt connection is the single cable from the shunt to the battery
bank’s master negative terminal.
ALWAYS turn the battery power on first to the Classic, then the PV input.