© 2020 Sensata Technologies
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8.0 Using a BMK
Where do I set the AmpHour Size setting?
Select a setting based on the
20-hr AmpHour capacity of the battery bank.
How do I determine my Battery Amp-Hour capacity?
Refer to the
battery manufacturer to obtain the 20-hr amp-hour capacity of your particular
batteries. Use this capacity and the total amount of batteries to determine
the AmpHour capacity of the inverter battery bank.
Info:
For batteries in parallel strings – add the AHr capacity of
each string (Ex.: three 250 AH batteries in parallel = 750 AH).
For batteries in a series string – use the amp-hour capacity of one
battery (Ex.: three 250 AH batteries in series = 250 AH).
Info:
The batteries should be a deep-cycle type and rated either
by AH or reserve capacity in minutes.
•
Amp-hour (AH) capacity is a measurement of how many amps a
battery can deliver for a speci
fi
ed length of time (usually 20 hours)
until the voltage achieves 1.75 VDC/cell at 80°F/27°C.
•
Reserve Capacity (RC) is a measure of how many minutes a
battery can deliver a certain amount of current (usually 25A) and
maintain a voltage above 1.75 VDC/cell at 80°F/27°C. If using the
Reserve Capacity (25A), the 20-hour AH capacity can be estimated
by multiplying ‘minutes reserve capacity’ by 50%.
8.1.2 Batt AmpHrs Setting
8.1.2.1 Accessing and Setting the Batt AmpHrs Setting
Press the METER button on the ME-RC, and then rotate the SELECT knob
until the display shows the
05 BM: Setup
menu. When the
05 BM: Setup
menu appears, press the SELECT knob to display the
BM Charge Eff
menu
item. Turn the SELECT knob until the
BM Amp Hours
menu appears. Press
the SELECT knob to display the current
Batt Amphr
setting. Turn the SELECT
knob to adjust the
Batt AmpHr
setting. Press the SELECT knob to select and
save the new setting (see Figure 8-3 below).
CAUTION:
It is important that the METER button’s
05 BM: Setup
menu’s
Batt Amphrs
setting is correct or else the calculations used
to determine the
02 BM:
SOC
display will be inaccurate.
• AmpHour
Size
– This setting is used by the battery monitor to calculate
the battery’s SOC. The AH size represents the amount of energy the battery
can deliver.
Default setting:
400 AH
Range:
200-2500 AH
press
to save
.......
Stat us...
Batt Amphr= 200
Stat us...
Batt Amphr= 400
Stat us...
Batt Amphr=2500
press the
SELECT knob
press the
SELECT knob
rotate to
desired
selection:
Status...
05 BM: Setup
From the
following menu:
Status...
BM Amp Hours
Rotate SELECT
knob to the
following menu:
.......
Figure 8-3, Adjusting the AmpHour Size
