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P a g e 1 0 - 0 2 9 - 1 R E V D
MNE-240 E-PANEL INSTRUCTIONS
ON ON
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OFF OFF
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5.0 Operation
When 120/240 VAC power (Utility or Generator) is provided to the inverter/charger through the
E-Panel, the battery charger function and internal transfer switch are enabled. This allows the
batteries to be kept fully charged and pass incoming AC power through the inverter to power
to the AC loads that are connected to the inverter. If the incoming power fails or the generator
stops feeding the E-Panel, the inverter function automatically is enabled to keep the inverter AC
loads from be interrupted. See the MS-AE Owner’s Manual for more information on it’s setup and
operation.
Main Battery Shutoff
The Battery Disconnect Breaker (see figure 1) is used to provide overcurrent protection for the
battery and inverter DC cables. This disconnect can also be used to disconnect the battery during
battery maintenance.
AC Input Disconnect
The AC Input disconnect is a dual-pole 30 amp circuit breaker. It allows full pass-thru capability
of the MS-AE inverter when switched ON. This breaker can be switched OFF to remove power
to the E-Panel from the incoming AC source (utility or generator). With this switch OFF and the
inverter turned off, the inverter, the connected loads, or any other installed equipment beyond
the E-Panel can be serviced.
Inverter Bypass Switch
The Inverter Bypass Switch allows the incoming AC power (utility or generator) to be connected
to the inverter AC loads either through the “inverter” or connected directly by “bypassing” the
inverter. After AC power is provided to the E-Panel, the bypass switch is ready to operate, either
in “INVERTER” mode or “BYPASS” mode. This simple switch uses a pair of double-pole 50 amp
circuit-breakers behind a sliding switch plate, which allows only one of the breaker pair to be
turned on at a time. This switch is wired between the AC source (utility or generator) and the
electrical sub-panel (or optional output breakers if installed in the E-Panel). This switch can easily
be moved to the “BYPASS” mode allowing the AC loads to continue to be powered if the inverter
or battery bank needs to be serviced/disconnected - without any re-wiring.
INVERTER Mode:
Normally the Inverter Bypass Switch would be left in the “INVERTER” mode.
In the “INVERTER” mode, power from the utility (or generator) is routed to the ‘Bypass Switch’
and passes through the inverter’s internal transfer relay. After leaving the inverter, the power
continues back to the bypass switch onto the sub-panel. In this mode, the AC power from the
utility (or generator) passes through the inverter to the sub-panel loads; and if the AC power
fails, the inverter automatically comes on to continue powering the sub-panel loads.
“INVERTER” mode
(slide switch up)
MidNite Solar
E-Panel
Main Panel
INVERTER
BYPASS
Bypass
Switch
Sub-Panel
Figure 17, Inverter Bypass Switch - INVERTER Mode
