Magnum Energy ME-RC Manuel du propriétaire télécharger pdf (Page 80)

8.0 Using a BMK

8.4.1 How the Battery Monitor (ME-BMK) Operates

The ME-BMK battery monitor uses a precision resistor known as a shunt

to measure current ﬂ ow into and out of the battery. The shunt provides a

small voltage to the Sense Module that is proportional to the current ﬂ ow.

When current starts ﬂ owing into or out of the battery, the Sense Module

measures the current ﬂ ow and determines the amount of current removed

from and returned to the battery. The amount of current (or AHrs) removed

or returned is displayed on the remote control as the AH I/O (AHrs In/

Out). The AH I/O number is compensated by a charging efﬁ ciency value that

accounts for energy loses while charging, and is one of the factors used to

determine the battery’s State Of Charge (SOC).

The battery’s state of charge—which is the best indicator of the condition of

the batteries—is indicated on the Batt SOC display. This display will show that

the batteries are fully charged (i.e., Batt SOC = 100%) once the following

three conditions have been met:

1. The charging voltage has stabilized over a period of time.

2. The charging current has decreased to a low percentage of the amp-

hour capacity—normally less than 2%.

3. The AHrs that were removed from the battery are within 1% of fully

being returned.

After the batteries have reached 100% SOC and have discharged ≥ 0.5% of

the battery capacity setting, the charge efﬁ ciency value will be recalculated

and the AH I/O read-out will reset to the recalculated value.

Info: Charging from a generator (non-inverter topology) adds some

concern about the cost of fuel. A balance should be considered

between the use of fuel and the need to charge your batteries to

100% SOC—to maintain the full service life of a battery. Batteries

discharged to 50% SOC and then normally recharged to 85-90%

SOC would be an efﬁ cient compromise between fuel cost and bat-

tery life. Trying to restore the last 10-15% of a full battery charge

requires a long time—typically several hours.

8.5 ME-RC METER Menu Items and Settings for BMK

Press the METER button on the ME-RC to access the different meters that

determine the status of the inverter/charger and battery system.

01 INV/CHG Meter – This menu provides the DC voltage and current of the

inverter/charger when inverting or charging. These are not BMK readings.

02 BM: SOC – This display is the best way to monitor the actual state of

the battery. The read only display shows the State Of Charge (SOC) for the

connected battery bank. The SOC represents the condition of the battery as

a percentage of the available capacity left in the battery. The range is 0% to

100%, where 100% represents a fully charged battery and 0% means the

battery is completely discharged.

When the Sense Module is ﬁ rst connected, the batteries will need to be fully

charged (i.e., Batt SOC = 100%) at least once to establish a SOC reference

8.4 Operating the BMK using the ME-RC

This section explains how the ME-BMK battery monitor works, and how to

use the ME-RC50 remote control to obtain battery bank information. It also

covers the various LCD displays that are related to the battery monitor and

the status of the Sense Module’s LED indicator.

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Magnum Energy ME-RC Manuel du propriétaire Page 80

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