Installation Guide

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10-264-1 REV-B

Whizbang Jr. – Installation Instructions

The Whizbang Junior provides highly accurate current sensing when used with

compatible Midnite Solar products. However, for our customers that already own

similar products, the Whizbang Jr. has been designed for cooperative

attachment. If you already own another battery-monitoring product and wish to

continue using it, skip down to step 1.2.

Step 1.1 (Whizbang Jr. only): Attach Whizbang Jr. to 500A/50mV Deltec MKB Shunt

or equivalent (see Figure 1).

WARNING: The Whizbang Jr. is designed for low-side shunt measurement. Make

certain shunt is attached to battery-negative, not battery-positive.

A. Remove sensing screws from shunt, including lock-washer and flat-washer.

Put flat washers to the side, they will not be used.

B. With lock-washers attached, guide both screws through the Whizbang

terminals.

C. Slide on provided 1/8” long spacers over screws on the back-side of the

Whizbang Jr.

D. Carefully guide the Whizbang Jr. to the shunt. The Whizbang Jr.’s violet

wire should be pointing toward the battery cable side of the shunt. Hand-

tighten screws to provide a solid connection. Loosen and retighten screws

to ensure a snug fit. Skip to 2.1.

Step 1.2 (Cooperative): Attach Whizbang Jr. to 500A/50mV Deltec MKB Shunt or

equivalent (see Figure 2).

WARNING: The Whizbang Jr. is designed for low-side shunt measurement. Make

certain shunt is attached to battery-negative, not battery-positive.

A. Remove sensing screws from shunt. Gather their attached lock-washers. The

pre-mounted screws and flat-washers will not be used. Put them to the

side.

B. Place provided 1/4" long spacers into Whizbang terminal recesses.

C. Attach lock-washers to included stainless-steel 3/4” screws, then slide

on #8 ring terminals w/attached 3

party wiring.

D. Guide both screws through the spacers and Whizbang terminals.

E. Slide on provided 1/8” long spacers over screws on the back-side of the

Whizbang Jr.

F. Carefully guide the Whizbang Jr. to the shunt. The Whizbang Jr.’s violet

wire should be pointing toward the battery cable side of the shunt. Hand-

tighten screws to provide a solid connection. Loosen and retighten screws

to ensure a snug fit.

Summary of content (6 pages)

PAGE 1
0-264-1 REV-B Whizbang Jr. – Installation Instructions The Whizbang Junior provides highly accurate current sensing when used with compatible Midnite Solar products. However, for our customers that already own similar products, the Whizbang Jr. has been designed for cooperative attachment. If you already own another battery-monitoring product and wish to continue using it, skip down to step 1.2. Step 1.1 (Whizbang Jr. only): Attach Whizbang Jr. to 500A/50mV Deltec MKB Shunt or equivalent (see Figure 1).
PAGE 2
10-264-1 REV-B NOTE: WHIZBANG JR. CAN BE MOUNTED ON SHUNT BACKWARDS, BUT MEASURED CURRENTS WILL BE OF INCORRECT POLARITY! Figure 1 – Whizbang Jr. Only Included Hardware: 2x 2x 2x 6-218-1 6-210-1 6-239-1 1/8” long, 1/4" O.D., .171” I.D. Alum. Spacer 1/4" long, 1/4" O.D., .171” I.D. Alum. Spacer 3/4" long #8-32 Phillips, Stainless. Not-Included Hardware: 1x 2x 9-004-1 None. Deltec MKB Series, 500A, 50mV Shunt. #8 Ring Terminals. Figure 2 – Whizbang Jr. and rd 3 party connections Step 2.
PAGE 3
10-264-1 REV-B The Whizbang Junior will need newer firmware loaded into the Classic and MNGP (MidNite Graphics Panel). You will want to make sure you have Software Revision 1758 or newer. To check your revision press the status button 6 times and look at the Classic Revision. Or if you are using a Classic Lite you can check the revision by going to the INFO tab on the Local Status Panel. Visit the following link and follow directions to bring your Classic/MNGP up to date. http://www.midnitesolar.
PAGE 4
10-264-1 REV-B Positive Amp Hours Net Amp Hours Negative Amp Hours Figure 5 – Whizbang jr. “More” Screen When the battery is receiving a charge, the accumulated positive Amp-hours figure will increase, as will the total Net figure. When the battery is being discharged, the accumulated negative Amp-hours will increase, and the total (Net) Amp-hours will decrease.
PAGE 5
10-264-1 REV-B We need to set the Efficiency. Typically on a flooded battery this will be between 94 and 96%. On a sealed battery it can be higher. If there is any question you should shoot for a lower efficiency, not a higher one. You can also contact your battery supplier for help with that value. After both of these are set, press Enter to save them. Next, press the upper right button, (Right Soft Key) to continue with setup. The Temperature reference where no compensation occurs Figure 7 – Whizbang jr.
PAGE 6
10-264-1 REV-B “SHUNT” (selecting “CLASC” uses the Classic’s internal shunt instead). Press Enter to save your choice. Setting the Ending Amps value properly is important. Setting this value too high will lead to under-charged batteries. Setting it too low may make it impossible to reach. In which case, the Classic will transition to Float based on Absorb time. Similarly, an Ending Amps setting of “<0.0” will disable this feature, causing the Classic to transition to Float based on Absorb time only.