Installation Guide

Battery Capacity Meter (continued)
2 |
P a g e 1 0 - 188- 1 R E V : C
12 Volt
Battery
24 Volt
Battery
36 Volt
Battery
48 Volt
Battery
State of
Charge
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%
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
The display above tells us that the batteries state of charge is 90% and that the battery, as indicated by the
RED Battery Care LED has not been fully charged in 2 weeks or more.
The Green LED will be illuminated under the following conditions:
FOR BATTERY SYSTEM VOLTAGE: 12v 24v 36v 48v
For Gel batteries, the voltage must reach
14.2v
28.4v
42.6v
56.8v
(for 1 hour)
For AGM batteries, the voltage must reach
14.4v
28.8v
43.2v
57.6v
(for 1 hour)
For Flooded batteries, the voltage must reach
14.7v
29.4v
44.1v
58.8v
(for 2 hours)
Key switched version instructions:
The “S” version (MNBCMS) of the meter has an additional short wire attached. This wire is the
“Switched lead” This feature allows the LEDS to be turned off while retaining the Battery Care
memories. This wire should be connected through a switch to Battery positive. This is usually the
ignition switch of a vehicle, but can also be any type of push button, or toggle switch.
If you do not have this extra wire and would like to use this feature, please go to :
http://www.midnitesolar.com/pdfs/batCapMeterMod.pdf
Specifications:
Battery voltage (Automatic select) 12V, 24V, 36V, 48V
Battery types supported Gel, AGM, Flooded Lead Acid
Maximum Input voltage (Reverse polarity protected) 70V
Average Power draw 12.5 mA
Switched version when “Off” 6mA or
.07watts@12v
Physical Size 4.75” x 3.76” x 0.85”
MidNite Solar Inc. midnitesolar.com
17722 67
th
Ave NE Ph: 360-403-7207
Arlington, WA 98223 Fax: [phone]