Magnum Energy ME-RTR Router - Manual (Page 47)

Page 39
©
2014 Magnum Energy, Inc.
Setup
Where should I set my Max Charge Time? In order to ensure a complete charge cycle is
accomplished, adjust the Max Charge: Time setting to a time period that will normally be longer
than the settings in the following SETUP menus: 03D Absorb Done Time, Absorb Done Amps, and
Absorb Done SOC. The Max Charge: Time setting has priority over these menus and will stop the
charge cycle once that setting is satisfi ed.
Example: The Max Charge: Time setting is 6 hours, but the Absorb Done Time setting is 8 hours.
After 6 hours in the absorption charge cycle, the charger transitions to the Final Charge stage.
• 03F Final Charge Stage: The Final Charge Stage setting determines what charge stage(s)
occurs after the absorption charge stage has fi nished.
Note: If “CC/CV Controlled” displays on this menu’s screen, you will not be able to adjust the
settings as “CC/CV” has been selected as the battery type from the 03C Battery Type menu.
Default setting: Final Charge Stage = Multi-Stage
Range: Multi-Stage, Float, Silent
◊ Set Final Charge Stage = Multi-Stage – The Multi-Stage setting transitions from the
Absorption charge stage to Float charge stage. Once in the Float stage for four hours with no DC
load on the batteries, the charger will enter the Full Charge stage (i.e., Battery Saver mode). In
Full Charge mode, the charger automatically stops charging but is still on and actively monitoring
the battery voltage. The charger will remain in the Full Charge stage until the battery voltage
drops below 12.7 VDC for 12-volt batteries (25.4 VDC for 24-volt batteries, and 50.8 VDC for
48-volt batteries), at which time it will return to the Float stage. The charger will continue
to cycle between Float and Full Charge as long as incoming AC is available. See Figure 3-14.
Note: These battery voltages are the fully charged voltages of a battery at rest.
Info: When Multi-Stage is selected and the charger goes to Full Charge mode, if another
charge source (such as PV or wind) is charging the batteries above the fully charged
voltage, the charger will remain in the Full Charge stage.
Why should I use Multi-Stage? Multi-Stage is the most commonly used charge mode. It is
suitable for most applications and assures a full charge to the batteries, without overcharging. If
there is another alternate charge source charging the batteries (PV, wind or hydro), then Multi-
Stage mode uses the inverter/charger to complete a full charge. The inverter/charger transitions
to Full Charge mode, and the alternate charge source then maintains the battery voltage. If the
alternate source is unable to maintain the voltage, the charger enters Float mode for another 4-hour
period. The Full Charge feature in the Multi-Stage mode also helps reduce water consumption in
fl ooded batteries when they are left in the charge mode for extended periods, such as in a backup
power application.
◊ Set Final Charge Stage = Float – The Float stage is a maintenance charge mode that
maintains a constant voltage—while delivering up to the maximum rated current of the
charger in order to power any DC loads connected to the batteries. Most 3-stage chargers
fi nish the charge mode in Float, and remain in Float as long as an AC source is available on the
input of the charger. The fl oat voltage is determined by the battery type selected in the 03C
Battery Type menu. Unlike Multi-Stage mode, in Float mode there is no Full Charge feature.
See Figure 3-15.
Why should I use the Float Charge Stage? Float mode is typically used when the charger is
the only charge source connected to the batteries. This mode will maintain the batteries at the
fl oat voltage. If using fl ooded batteries and the charger is in fl oat for an extended period, the
water level should be checked every two to three weeks for proper levels.