Installation Guide

Battery Capacity Meter

MNBCM / MNBCMS 12-23-14

Installation:

The Midnite Solar MNBCM is intended for indoor use only and should be protected from rain, moisture

and direct sun.

1) Remove the front cover of the Battery Meter by using a small blade screwdriver to gently pry off

the cover using the small slots on each side of the case.

2) Drill a small hole in the lower right corner of the mounting area of the wall for the power cable.

If this is a metal penetration, be sure to use a grommet or sleeve to protect the wires from sharp edges.

3) Carefully route the wires through the hole and mount the base using the 4 screw holes.

4) Re-attach the Cover to the Base.

Power Wire Hookup:

Warning: A DC rated fuse or breaker of no more than 2 amps must be fitted in the positive (Red)

line at the battery or power distribution panel.

The Positive (Red) wire attaches to the battery or distribution panel “+” terminal (after the fuse)

The Negative (Black) wire attaches to the “-” terminal

The Midnite Battery Meter will automatically select the proper operation voltage for your batteries.

When power is first applied, the Battery Meter will enter its self-test mode. Each LED should light in

sequence.

Battery Type Selection Jumper:

The Battery Meter is able to be used with all types of lead acid batteries. The Battery Meter will

automatically detect the voltage of the battery bank, but for the most accurate readings you should set

your MNBCM for the type of battery being monitored.

To select from the 3 most common types, there are a set of 3 pins along the bottom of the circuit board.

Simply place the small black jumper on the pins as follows:

For “Gel” type sealed batteries, the jumper is placed on the 2 Left most pins.

For “AGM” type sealed batteries, the jumper is placed on the 2 Right most

pins. For “Flooded” type, non-sealed batteries, the Jumper is not used.

Operation:

There are 10 “Battery State of Charge” LEDs and 3 “Battery care”

LEDs. State of charge is displayed by the arched, 10 LED percentage

“Meter”.

The 3 “Battery Care” LED’s are on the left side and will indicate the following conditions:

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Battery Capacity Meter MNBCM / MNBCMS 12-23-14 Installation: The Midnite Solar MNBCM is intended for indoor use only and should be protected from rain, moisture and direct sun. 1) Remove the front cover of the Battery Meter by using a small blade screwdriver to gently pry off the cover using the small slots on each side of the case. 2) Drill a small hole in the lower right corner of the mounting area of the wall for the power cable.
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Battery Capacity Meter (continued) 1- The top GREEN LED will light up when the batteries have received a “Full Charge”. 2- The center AMBER LED will come on if the batteries have not been fully charged for 1 week. 3- The bottom RED LED shows that the batteries have not been charged for 2 weeks or more. Approximate battery voltages relative to percent State of Charge 12 Volt Battery 11.65 11.77 11.89 12.02 12.14 12.26 12.38 12.51 12.63 12.75 24 Volt Battery 23.30 23.54 23.79 24.03 24.28 24.52 24.77 25.