Magnum Energy ME-ARC Remote User Manual

Page 35

Page 28

Setup

Figure 3-10, CV Charge Done Time/Amps Stages (INV/CHG)

Constant

Current

Constant

Voltage

Silent

Constant

Current

Voltage

Current

Max Charge

Amps

CV Charge

Volts

Recharge

Volts

(restarts

Constant

Current

charge)

CV Charge Done

(= Time or Amps)

CURRENT & VOLTAGE

TIME

¤ Set CV Charge Done – These selections determine when the second stage of charging

(Constant Voltage) is fi nished. If using the CV Chg Done Time or CV Chg Done Amps selec-

tions, once the Constant Voltage charge cycle is fi nished, it transitions to a Silent charge

stage. After entering the Silent charge mode, the charger automatically stops charging,

but is still actively monitoring the battery voltage. The charger will remain “Silent” until the

battery voltage drops to the Set Recharge Volts setting, at which time the charger will start

another Constant Current/Constant Voltage charge cycle (see Figure 3-10).
Default: CV Charge Done Time
Range: Time, Amps, Hold CV Chg VDC

* Set CV Chg Done Time – The CV Chg Done Time selection is used when a spe-

cifi c time is selected to be the best solution for determining when the batteries are fully

charged and the Constant Voltage stage needs to end. This setting determines how long

the charger will hold the battery voltage at the CV Charge Volts setting—based on a set

time period. When using time, the battery bank size will typically determine the length of

the CV Chg Done Time setting. The larger the battery bank, the longer the time needed

to ensure a full charge to the batteries. If the setting is from 0.1 to 25.5 hrs, the charger

transitions to the Silent charge mode after the battery voltage has been at the charge

voltage setting for the selected time. Refer to Table 3-2 to assist you in selecting the CV

Chg Done Time setting based on the AHr capacity of your battery bank.
Note: After choosing Set CV Chg Done Time, the Set Max CC/CV Time and Set Recharge

Volts settings must be determined (see next page).
Default: 2.0 Hrs
Range: 0.1-25.5 Hrs
* Set CV Chg Done Amps – The CV Chg Done Amps setting is used when the DC

amperage supplied to the batteries (also known as “return amps”) determines when the

batteries are fully charged and the Constant Voltage stage needs to end. This setting

determines how long the charger will hold the battery voltage at the CV Charge Volts set-

ting—based on a minimum current setting (i.e., return amps). During the Constant Volt-

age charge mode, as the battery charges, the current from the charger slowly decreases.

When this current decreases below the CV Chg Done Amps setting, the charger transitions

to the Silent charge stage. Most battery manufacturers use a specifi c formula to determine

the return amps that indicate a full charge for their particular type of battery. The formula

used by most manufacturers to absorb the batteries is C/20, where C=Battery Bank’s To-

tal Amp Hours. Basically, they take approximately 5% of the total battery bank size and

consider the battery totally charged when the charger’s return amps drops to this level.