Magnum Energy ME-G Series - Manual (Page 39)

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2015 Sensata Technologies Page 30
Operation
3.0 Operation
The ME-G Series inverter has two normal operating routines: Inverter mode, which powers your
loads using the batteries; and Standby mode, which transfers the incoming AC power (e.g., utility
power or a generator) to power your loads and to recharge the batteries. The ME-G Series also
includes an extensive protection circuitry to shut down the inverter under certain fault conditions.
3.1 Inverter Mode
When the ME-G Series is fi rst powered up, it defaults to the OFF mode. The momentary ON/OFF
power switch ( Figure 1-1, Item 1) m ust be lightly pressed to turn the inverter on. Subsequently,
pressing this switch alternately turns the inverter off and on.
Inverter OFF – When the inverter is off, no power is used from the batteries to power the AC
loads, and the status LED will be off. If AC power from an external source (utility or generator)
is connected and qualifi ed on the inverter’s AC input, this AC input power passes through the
inverter to power the AC loads. However, if this AC power is lost, the AC loads no longer powered
because the inverter is off.
When the inverter is turned on, it operates either by “searching” or “inverting”, depending on the
connected AC loads.
Searching – When the inverter is fi rst turned on, the automatic Search feature is enabled. This
feature conserves battery power when AC power is not required. In this mode, the inverter pulses
the AC output looking for an AC load (e.g., electrical appliance). Whenever an AC load (greater
than 5 watts) is turned on, the inverter recognizes the need for power and automatically starts
inverting. When there is no load (or less than 5 watts) detected, the inverter automatically
goes back into Search mode to minimize energy consumption from the battery bank. When the
inverter is searching, the inverter’s green LED fl ashes (medium fl ash – blinks once every second).
Info: The factory default value for the Search feature is 5 watts. It can be turned off or
adjusted from 5 to 50 watts using a remote display.
Inverting – When a load greater than 5 watts is connected to the inverter output, the ME-G
Series inverts the DC power from the battery and supplies 120 VAC power to the inverter’s GFCI
outlet (and to sub-panel, if connected). The inverter’s green LED fl ashes once every second
(medium fl ash) to indicate it is inverting. The amount of time the inverter can be inverting and
providing power is directly related to the amount of AC loads that are connected, and the capacity
of the battery bank. Refer to Figure 3-1 to see the fl ow of power from the DC input to the AC
output while in Inverter mode.
Figure 3-1, Power Flow – Inverter Mode
GFCI
120 VAC
OUTPUT
Neutral-Ground
Transfer Relay
AC Hot
Transfer Relay
AC HOT 1 IN
AC HOT 2 IN
AC NEU IN
AC GROUND
Power Transformer
FET Bridge
AC
DC
DC
IN
AC HOT 2 OUT
DC POSITIVE
DC NEGATIVE
AC NEU OUT
INPUT
(30A)
120
VAC
AC
OUT
GFCI
(20A)