MidNite MNBCM Installation Manual

MidNite Solar Battery Monitor MNBCM Rev D 1

Installation

Remove Cover of Battery Monitor using the slots in side of plastic case.
Attach Battery Monitor base using 4 screw holes.
Reattach Cover to base.

Battery Cable Hookup
Attach RED wire to battery bank “+” plus terminal

Attach BLACK wire to battery bank “-“ minus terminal

*Note: The Battery Monitor enters the self test
mode when power if first applied. All LEDs are
tested one by one.

12 Volt
Battery

11.65 23.30 34.95 46.60 10%

11.77 23.54 35.31 47.08 20%

11.89 23.79 35.67 47.58 30%

12.02 24.03 36.06 48.06 40%

12.14 24.28 36.42 48.56 50%

12.26 24.52 36.78 49.04 60%

12.38 24.77 37.14 49.54 70%

12.51 25.01 37.53 50.02 80%

12.63 25.25 37.89 50.50 90%

12.75 25.50 38.25 51.00 100%

14.25 28.50 42.75 57.00 Full Rate FLA

13.65 27.30 40.95 54.60 Full Rate Gel

24 Volt
Battery

36 Volt
Battery

48 Volt
Battery

State of Charge

Battery chemistry jumper:
ON = GEL

(13.65V to turn on green light)

OFF = AGM & FLOODED (14.25V
to turn on green light)

voltage must be attained for 2

hours to turn green light on

MidNite Solar Battery Monitor MNBCM Rev D 2

Status Display

One of 10 LEDs light to show present battery capacity. Capacity is based on
battery voltage.

Extended status is displayed using one of the three LEDs located under the
tinted window. Use the decal on the cover as a key to explain their meaning.

On the above display the green LED indicates the battery has 90% of full charge.
The red LED behind the tinted cover indicates the battery has not been fully
charged for at least 2 weeks.

Nominal Input Voltage Range 12V, 24V, 36V, 48V
Absolute Maximum Input 70V
Reverse Polarity Protection (max) 100V
Average Current 15 mA (at 12V)
Charge Status LEDs 10
Extended Charge Status LEDs 3
Physical Size 4.75” x 3.76” x 0.85”
Humidity 5 – 95% Non Condensing

Indoor Installation Only in Dry Area Protected from direct sun.
Battery Monitor must be installed within 30 ft. of battery bank.

MidNite Solar Inc. midnitesolar.com
17722 67
Arlington, WA 98223 Fax: [phone]

th

Ave NE Ph: 425-374-9060