Figure 3-3, Automatic 4-Stage Charging Graph - Magnum Energy MS-PAE Series Owner's Manual

Pure sine wave inverter / charger

Hide thumbs

Table Of Contents

Table of Contents

Operation

The Charge Mode provides up to four separate charging stages: Bulk Charging, Absorb Charging,

Float Charging and Full Charge.

Bulk Charging; This is the initial stage of charging. While Bulk Charging, the charger supplies the

battery with controlled constant current. The charger will remain in Bulk charge until the Absorp-

tion charge voltage (determined by the Battery Type selection*) is achieved. The inverter's green

LED stays ON (solid) to indicate Bulk charging.

Absorb Charging; This is the second charging stage and begins after the absorb voltage has

been reached. Absorb Charging provides the batteries with a constant voltage and reduces the

DC charging current in order to maintain the absorb voltage setting. The inverter's green LED

ﬂ ashes once every second (fast ﬂ ash) to indicate absorption charging for 2 hours (determined by

the Battery AmpHrs selection*), then switches to Float Charging.

Float Charging; The third charging stage occurs at the end of the Absorb Charging time. While

Float charging, the charge voltage is reduced to the ﬂ oat charge voltage (determined by the Bat-

tery Type selection*). In this stage, the batteries are kept fully charged and ready if needed by

the inverter. The inverter's green LED ﬂ ashes once every 8 seconds (slow ﬂ ash) to indicate ﬂ oat

charging. The ﬂ oat charging stage reduces battery gassing, minimizes watering requirements (for

ﬂ ooded batteries) and ensures the batteries are maintained at optimum capacity.

Full Charge (Battery Saver™ mode); The fourth stage occurs after four hours in the ﬂ oat

charging stage. The Full Charge stage is designed to keep batteries fully charged over long peri-

ods and prevent excessive loss of water in ﬂ ooded batteries or drying out of GEL/AGM batteries.

In this stage the charger is turned off and begins monitoring the battery voltage; if the battery

voltage drops low (25.4 VDC or less on 24-volt models; or 50.8 VDC or less on 48-volt models),

the charger automatically initiates another four hours in Float Charge.

Info: If the battery voltage falls to the re-bulk voltage (24.2V on 24-volt models or

48.4V on 48-volt models) or lower, the unit will begin another Bulk charge.

* These settings in the MS-PAE Series are changeable and leave the factory with default values (see

Table 3-2, Inverter/Charger Default Values). These default values are adequate for most installa-

tions, however, if you determine that some of the values need to be changed for your particular

system, the ME-RC50 remote control may be purchased to adjust these settings.

Voltage

Time

Current