Figure 15, Automatic 4-Stage Charging Graph - Magnum Energy MMS1012 Owner's Manual

3.0 Operation
Charging
DC
Voltage
Increased
Voltage
DC
Current
Constant
Current

Figure 15, Automatic 4-Stage Charging Graph

Transfer time - While in Standby Mode, the AC input is continually
monitored. Whenever AC power falls below the VAC dropout voltage
(80 VAC, default setting), the inverter automatically transfers back
to Inverter Mode with minimum interruption to your appliances – as
long as the inverter is turned on. The transfer from Standby Mode to
Inverter Mode averages approximately 16 milliseconds. While the MMS
Series is not designed as a computer UPS system, this transfer time
is usually fast enough to hold them up. However, the VAC dropout
setting has an effect on the ability of the loads to transfer without
resetting. The lower this setting, the longer the effective transfer
will be and therefore, the higher the probability for the output loads
to reset. This occurs because the incoming AC voltage is allowed to
fall to a level that is so low that when the transfer does occur, the
voltage on the inverter's output has already fallen to a low enough
level to reset the loads.
The disadvantage of a higher VAC dropout setting is that smaller
generators (or large generators with an unstable output) may nui-
sance transfer. This commonly happens when powering loads that
are larger than the generator can handle – causing the generator's
output voltage to constantly fall below the inverter's input VAC drop-
out threshold.
Info: You must use the ME-RC50 or ME-ARC50 remote
to adjust the VAC dropout setting – which in turn
determines the VAC dropout threshold.
Info: When switching from Inverter Mode to Standby
Mode, the inverter waits approximately 15 seconds to
ensure the AC source is stable before transferring.
30
Bulk Absorb
Charging
Absorb volts
Absorb and Float voltage settings are
determined by the 'Battery Type' selection
Constant
Voltage
Time
'Adj
Charge
Rate'
Absorb Time
Setting
(d etermin ed b y
th e 'Ad j Batt
Amp H rs' settin g )
Reduced
Current
Float Full
Charging Charge
Float
volts
Reduced Monitored
Voltage Voltage
Goes to Full
Charge after 4
hours in Float
Charge
Monitored
No Current
Current
© 2010 Magnum Energy, Inc.