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MNE-240 Series E-Panel Owners Manual MNE-240 Series E-Panel
Owners Manual Important Information
Disclaimer of Liability
MidNite products are not intended for use in connection with Life Support Systems. MidNite Solar
makes no warranty or representation in connection with their products for such uses.
Since the use of this manual and the conditions or methods of installation, operation, use of the
E-Panel are beyond the control of MidNite Solar, this company does not assume responsibility and
expressly disclaims liability for loss, damage or expense, whether direct, indirect, consequential
or incidental, arising out of or anyway connected with such installation, operation, or use.
Important Safety Instructions
This manual contains important safety instructions that must be followed during the installation
and operation of this product.
General Precautions
Before installing and using this product read all instructions and safety information contained
in this manual and attached to the E-Panel.
All electrical work must be performed in accordance with local, state and federal electrical
codes.
This product is designed for indoor/compartment installation. It must not be exposed to rain,
snow, moisture or liquids of any type.
Use insulated tools to reduce the chance of electrical shock or accidental short circuits.
Remove all jewelry such as rings, watches, bracelets, etc., when installing or performing
maintenance.
Always disconnect the batteries or energy source prior to installing or performing maintenance
on the inverter. Live power may be present at more than one point since an inverter utilizes
both batteries and AC.
Battery Safety
Wear eye protection such as safety glasses when working with batteries.
For battery installation and maintenance read the instructions provided with the batteries
prior to installing or use.
Never work alone; always have someone near you when working around batteries.
Use proper lifting techniques when working with batteries.
Never use old or untested batteries. Check each battery's label for age, type and date code to
ensure all batteries are identical.
Batteries are sensitive to changes in temperature. Always install batteries in a stable
environment.
Install Flooded (Liquid Lead Acid) batteries in a well ventilated area. Theses type of batteries
can produce explosive gasses. For compartment or enclosure installations, always vent batteries
to the outside.
Provide at least one inch of air space between batteries to provide optimum cooling.
To prevent a spark at the battery and reduce the chance of explosion, always connect the
cables to the batteries rst. Then connect the cables to the inverter.
Always verify proper polarity and voltage before connecting the batteries to the inverter.
To reduce the chance of re or explosion, do not short-circuit the batteries.
In the even of accidental exposure to battery acid, wash thoroughly with soap and water. In
the event of exposure to the eyes, ood them for at least 15 minutes with running water and seek
immediate medical attention. ©
2007 MidNite Solar
Page 1
MNE-240 Series E-Panel Owners Manual
1.0 Introduction
The MNE-240 Series E-Panel enclosure from MidNite Solar provides the basic DC and AC over-
current protection and disconnects required for a NEC compliant renewable energy system. It is
speci cally designed to accommodate inverters that provide 120/240VAC in a single unit. The
MNE-240 Series E-Panel can expand to grow as your needs arise and includes the following:
Powder-coated steel chassis with knockouts to accommodate various install needs.
Inverter mounts on a unique hinged door to keep a small system foot-print
E-Panel mounting brackets are included to aid in one person installations
Inverter battery breaker, inverters cables and snap in grommets included
500 amp/50 mV shunt included for battery monitoring systems
Heavy duty 150 amp bus-bars for AC HOT, NEUTRAL, GROUND, BATT +/- and PV + included
Dual 50 amp AC input disconnects for generator or utility (prewired)
Dual 50 amp inverter AC Bypass Switch (prewired)
Bracket included for mounting optional charge controller (Classic or MX60)
Inverter, remote control and charge controller mounting hardware included
One rectangular cut-out for mounting a North American GFCI style AC outlet
Cut-outs for mounting up to six additional 13mm wide din-rail mount AC and DC breakers (for
circuits such as PV, wind, hydro or AC distribution)
Conforms to UL508A 1st Edition and CSA C22.2 #14-M95 (Industrial Control Panel)
2.0 Features
Refer to Figure 1 for the following information.
The MNE-240 Series E-Panel incorporates all the AC and DC wiring bus-bars and disconnects
required to connect the Magnum MS-AE Series inverter/charger system.
It also provides additional room to install additional equipment, such as the MidNite Classic Charge
controller (with accompanying solar array breakers/disconnects and battery temp sensors), the
Magnum Battery Monitor, a PV Ground Fault device, and AC branch breakers (that can be used
in lieu of an AC sub-panel to power the inverters AC loads). These additional breakers are
installed on a supplied Din-rail mounting bracket that has space for up to six 13mm sized AC or
DC breakers.
The E-Panel includes a DC Breaker used to disconnect the battery bank from the inverter as
required by the National Electric Code (NEC). This breaker is also used as an overcurrent device
to protect against extremely high currents that a battery is capable of producing if any short
circuits occur. A variety of DC Breaker options are available from MidNite Solar.
Next to the DC Breaker is a 500 amp/50 mV shunt with a DC negative bus-bar attached. The
shunt is provided so that a Battery Monitor, which is used to determine the battery banks state
of charge, may be easily connected without any rewiring. The DC negative bus-bar provides a DC
negative connection point for any DC loads or PV Panels in the installation.
Located on the right side of the E-Panel system is an AC input disconnect and an inverter bypass
switch. The AC disconnect is used to remove the incoming AC power to the inverter input. The
inverter bypass switch is provided to easily route the incoming AC power around the inverter and
directly to the AC loads in the system - without rewiring or losing power to the AC loads in the
system - in case the inverter needs to be removed. ©
2007 MidNite Solar
Page 2
MNE-240 Series E-Panel Owners Manual
FRONT SIDE
30 30
30
ME-RC
Remote
Control
MS-AE
Series
Inverter /
Charger
DC
Di
s
c
o
n
n
ect
Inverting
DC 50.4 5A
S E LE C T
TECH
AGS
METER
SETUP
SHORE
I
NVERTER
CHARGER
I NV
CHG
FAULT
PWR
O N /O F F
O N / O F F
I N V E R TE R
B Y P A S S
O N
O FF
O N
O FF
Cutouts for GFCI AC Outlet
(not supplied)
Cutouts for up to six 13mm
Din Rail Circuit Breakers
(breakers not supplied )
Inverter Bypass Switch
LEFT
SIDE
RIGHT
SIDE
Mounting Bracket for
Charge Conroller
Battery Shut Off
(for inverter )
AC Input Disconnect
ME-RC Remote
Mounting Bracket
(Optional Remote available )
Lower Mounting Bracket
Upper Shield
DC Cover
Charge
Controller
Right Hinge Door
(left hinge door is available )
Upper Mounting Bracket
500A/50mV
Shunt
AC Input/Output
Bus-bars
Ground
Bus-bar
Positive and Negative Inverter Cables
Inverter AC input/Output Wires
PV Positive (+) Bus-bar
Battery
Positive (+)
Bus-bar
Battery
Negative (-)
Bus-bar
ME-BMK
Battery
Monitor
Many Knockouts with
various sizes on every side
Door Grommet (3.5")
Figure 1, MNE-240 Series E-Panel Features ©
2007 MidNite Solar
Page 3
MNE-240 Series E-Panel Owners Manual
3.0 Installation
Before installing, read the entire installation section to determine how you are going to install
your E-Panel. The more thorough you plan in the beginning, the better your overall system needs
will be met.
A basic system diagram for the MNE-240 Series E-Panel is shown in Figure 2, MNE-240 Series
E-Panel System Wiring Diagram. This diagram should be reviewed to assist you in planning and
designing your installation.
Info: Installations should be performed by quali ed personnel, such as a licensed or
certi ed electrician. It is the installers responsibility to determine which safety codes
apply and to ensure that all applicable installation requirements are followed.
Info: It is easier to install and wire any additional accessories (i.e. breakers for charge
control, the inverter, etc.) while the E-Panel is still lying horizontal on a table. Do as much
as possible before mounting the E-Panel on the wall.
3.1 Door Con guration
The standard E-Panel ships with breakers on the right side and with a right hand hinge. The
door will open to the right over the breakers. If for some reason you need the breakers on the
right, but the door to open to the left, then you can purchase the left hand door (part number
MNEleftdoorSTM-240).
Info: The circuit-breakers can be moved from the right side and reassembled on the left
side of the chassis. Even though this is possible, it is not advised. Moving the breakers is
very time consuming and the bypass switch will need to be re-positioned and rewired. It
is much more ef cient to so spend the time before the installation to pre-determine and
order the correct side (left hinge or right hinge door).
3.2