Hawke’s Bay
Manual
17| P a g e 1 0 - 4 2 5 - 1 R E V : - F W : X X X
2.
Pick a battery in the middle of your battery bank. About halfway up the side of the
selected battery case, clean that area, remove the protective tape, and affix the BTS
sensor to the battery wall.
Whiz Bang Jr.
The Whiz Bang Jr (WBJr) is a current-sensing device that mounts to the side of a standard
500A/50mV shunt. The WBJr measures the current across the shunt into (and out of) the
battery bank and reports this current flow to the
Hawke’s Bay
to be used in calculating an
accurate State of Charge (SOC) percentage and to monitor for Ending Amps, which is a targeted
setpoint to terminate the Absorb charge cycle.
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 16
. 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.
Connecting the WBJr:
1.
Connect the WBJr
’s purple
wire to the terminal block, #4, as shown in
Figure 2
.
2.
Referencing
Figure 16
:
a.
If the WBJr purple wire is pointing to
the right as shown, then the shunt’s big
right bolt is connected to the battery
bank’s master negative terminal. There
can ONLY be one wire connected to this
shunt bolt.
b.
Connect the inverter’s Batt
- cable, the
Hawke’s Bay
Batt- cable, and all other
DC- cables to the left bolt of the shunt.
Activating the WBJr:
1.
In the Setup / Battery Config Menu, you need to program the following setpoints:
Figure 16
For double-wall battery construction, consult the battery manufacturer for BTS sensor placement.
