Magnum Energy ME Series User manual

ME Series
Inverter / Chargers
Operator’s Manual

IMPORTANT SAFETY INSTRUCTIONS
This manual contains important safety instructions that must me followed during the
installation and operation of this product.
To reduce the risk of electrical shock, fire, or other safety hazard, the following safety symbols
have been placed throughout this manual to indicate dangerous and important safety instructions.
WARNING -Indicates a dangerous voltage or condition exists.
CAUTION -Indicates a critical step necessary for the safe installation and
operation of this device.
NOTE -Indicates an important statement. Follow these instructions closely.
ATTENTION -Electrostatic Sensitive Devices. Observe precautions for
handling.
All electrical work must be performed in accordance with local, state
and federal electrical codes.
Read all instructions and safety information contained in this manual before
installing or using this product.
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 on the inverter.
Always disconnect the batteries or energy source prior to installing or per-
forming maintenance on the inverter.
Live power may be present at more than one point since an inverter utilizes both batteries and
AC.
Always verify proper wiring prior to starting the inverter. There
are no user serviceable parts contained in this product.
SAVE THESE INSTRUCTIONS i
Ó 2003 -Magnum Energy, Inc.

IMPORTANT
BATTERY SAFETY INSTRUCTIONS
Wear eye protection such as safety glasses when working with batteries.
Remove all jewelry such as rings, watches, bracelets, etc., when installing or performing
maintenance on the inverter.
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 batteries in a well ventilated area. 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.
Never smoke when in the vicinity of batteries.
To prevent a spark at the battery and reduce the chance of explosion, always connect the cables to
the batteries first. Then connect the cables to the inverter.
Use insulated tools at all times.
Always verify proper polarity and voltage before connecting the batteries to
the inverter.
To reduce the chance of fire 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
even of exposure to the eyes, flood them for at least 15 minutes with running water and seek
immediate medical attention.
Recycle old batteries.
SAVE THESE INSTRUCTIONS
ii
Ó 2003 -Magnum Energy, Inc.

Magnum Energy
ME Series Inverter / Chargers
Table of Contents
Section Description Page
1.
Introduction
1
1. Features and Benefits 1
2. Standard Features 1
3. How an Inverter/Charger Works 3
4. Appliances and Run Time 3
5. The ME Series Inverter/Charger 5
2. Installation 7
1. Unpacking and Inspection 7
2. Pre-Installation 7
Locating the Inverter 7
Locating Dedicated Batteries (optional) 7
Hardware / Materials Required 8
Tools Required 8
Wiring 8
AC Connections 8
DC Connections 8
AC Grounding 8
DC Grounding 8
Torque Requirements 9
AC Main Panel 9
Circuit Protection 9
Wire Routing 9
3. Installation 11
Inverter Mounting 11
Battery Installation 11
Battery Cables and Sizing 12
DC Wiring 12
DC Grounding 12
Negative Cable 12
Positive Cable 12
Battery Wiring 13
Parallel Connection 13
Series Connection 15
Series/Parallel Connection 15
DC Fuse Block 17
AC Wiring 19
AC Input (Shore Power) Routing 19
AC Input (Generator) Routing 19
Main AC Electrical Panel Routing 19
Wiring the Inverter AC Input 21
Wiring the Inverter AC Output 21
Final Inspection 21
Ó 2003 -Magnum Energy, Inc. iii

Table of Contents, continued
Section Description Page
2.
Installation, continued
4. Options 25
Battery Temperature Sensor Installation and Wiring 25
Remote Control Installation and Wiring 25
AGS Module 25
Smart Shunt 25
Stacking Cable Kit 25
5. Start-up and Test 26
Connecting the Batteries to the Inverter 26
Final Inspection and Power-up 26
Configuring the Inverter 27
3. Operation 28
1. Operating the Inverter 29
Search 29
Inverter Mode 29
AC Shore Power Mode 29
Bulk Charge Mode 29
Absorption Charge Mode 29
Float Charge Mode 29
Battery SaverTM Mode 29
Fault or Alarm Conditions 31
Low Battery 31
High Battery 31
Overload 31
Overtemperature 31
4. Troubleshooting 33
1. Basic Troubleshooting 33
5. Preventive Maintenance 34
1. Recommended Inverter and Battery Care 34
2. Off-Season Storage 34
6. Specifications 35
7. Warranty 36
iv Ó 2003 -
Magnum Energy, Inc.

1. INTRODUCTION
1. Features and Benefits
Congratulations on your purchase of the ME Series inverter/charger from Magnum
Energy. The ME Series is a “new generation” inverter designed especially for rugged
recreational vehicle usage. Powerful, yet simple to use, the Magnum Energy inverter will provide you with
years of trouble-free performance so you can enjoy the all of the comforts you have come to expect from
your RV, all backed by our limited 3 year (36-month warranty).
The ME Series inverter is ETL Listed meeting the stringent requirements of UL458,
ensuring you the highest level of electrical safety and reliability.
Installation is easy. Simply connect the inverter’s output to your distribution circuits
or electrical panel; connect your shore power cable (AC) to the inverter’s easy-to-reach
terminal block; connect the batteries, and then switch on the power. Using the optional remote
control, you can easily operate your inverter from anywhere within your motor coach.
2. Standard Features
•Four Power Models (ME1512RV, ME2012RV, ME2512RV and ME3012RV)
•Shelf, Bulkhead or Upside Down Mounting
•Modified Sine Wave Output
•Power Factor Corrected Charger (Sine Wave)
•RS485 Communication Port
•Remote Port
•Flash Programming
•ON/OFF Inverter-mounted Switch with LED Indicator
•50 Amp Transfer (on Dual IN / Dual OUT Models)
•Extra Large AC Access Cover with Terminal Screw Block
•360 degree DC Connection Terminals with Covers
•Battery Temperature Sensor -for optimum battery charging
•Aluminum Cover
•Smooth, Aesthetically Pleasing Design
•ETL listed to UL/cUL 458
The following accessories are also available for ME Series products:
Remote Control -for convenient finger tip operation
AGS Module -automatically starts and stops your generator Smart Shunt
-provides precise voltage to DC current
Stacking Cable Kit -designed to accommodate dual inverter configurations
Ó 2003 -Magnum Energy, Inc. 1

1. INTRODUCTION
Figure 1
ME Series Inverter / Charger
Ó 2003 -Magnum Energy, Inc. 2

1. INTRODUCTION
3. How an Inverter/Charger Works
An inverter takes direct current (DC) from your batteries and turns it into alternating
current (AC), exactly like you use at home. It also takes alternating current when your motor coach is
connected to shore power and transforms it into direct current to recharge your batteries.
There are two modes of operation associated with an inverter/charger: Inverter Mode:
Direct current (DC) from the vehicle’s batteries is transformed into alternating
current (AC) for use with you household electrical appliances.
Charger Mode:
Alternating current (AC) is taken directly from shore power (or other AC sources) and
passed directly to your household appliances. At the same time, the incoming AC is also converted
to DC to recharge the vehicle’s batteries.
4. Appliances and Run Time
The ME Series inverter/charger can power a wide range of household appliances
including small motors, hair dryers, clocks and other electrical devices. As with any
appliance using batteries for power, there is a certain length of time that it can run -this is called “run
time.” Actual run time depends on several variables including the size and the type of
appliance, the type of batteries installed in your recreational vehicle, as well as the battery’s
capacity and age. Other factors such as the battery’s state of charge and temperature can also affect the
length of time your appliances can run.
Appliances such as TVs, VCRs, stereos, computers, coffee pots, incandescent lights
and toasters can all be successfully powered by your inverter. Largerelectrical appliances,
however, such as stoves, water heaters, etc., can quickly drain your batteries and are not recommended for
this application.
All electrical appliances are rated by the amount of power they consume. The rating is printed on
the product’s nameplate label, usually located on its chassis near the AC power cord. Even
though it is difficult to calculate exactly how long aninverter will run a particular appliance, the
best advice is trial and error. Your ME Series inverter has a built-in safeguard that
automatically protects your batteries from over discharge.
NOTE: For optimum performance, a minimum battery bank of 200 AHr is
recommended.
Device Load Device Load
Blender 400 W Coffee Maker 1200 W
Computer 300 W Color TV 150 W
Drill 500W Hair Dryer 1000 W
Hot Plate 1800 W Iron 1000 W
Light (Flo) 10 W Light (Inc) 100 W
Microwave 1000 W Refridgerator 500 W
Table 1 -Typical Appliance Power Consumption Ó 2003 -Magnum Energy, Inc.
3

1. INTRODUCTION
4
Power ON/OFF
Switch
Charging / Inverting
LED
Stack Port Magnum
Net Port Remote
Port
Battery Temp Sensor Port
Figure 2
ME Series Inverter / Charger
Switch, LED and Connection Ports
Figure 3
ME Series Inverter / Charger
Electrical Connection Points
Ó 2003 -Magnum Energy, Inc.

1. INTRODUCTION
5. The ME Series Inverter/Charger
The ME Series inverter/charger is designed to allow easy access to wiring, circuit
breakers, controls and LED status indicator. Its die cast baseplate with one piece aluminum cover ensures
maximum durability with minimum weight, as well as cooler more efficient operation. The inverter is
equipped with the following features:
ON / OFF Switch -used to manually switch the inverter ON and OFF.
Green LED Indicator
•Medium flash (1 every 2 seconds)
Indicates connected loads are being powered from the batteries (inverting).
•Fast flash (1 per second)
Indicates “search” mode, conserving power when appliances are switched OFF.
•Solid
Indicates “bulk” charge when the batteries are low and the inverter is connected to shore power.
•Fast flash (1 per second)
Indicates “absorption” charge when the batteries are almost fully recharged and the
inverter is connected to shore power.
•Slow flash (1 every 8 seconds)
Indicates “float” charge when batteries are fully charged and the inverter is
connected to shore power.
•LED off
Indicates a “fault” condition such as low battery, overload or over temperature.
Remote Control Port -accepts connector for Magnum remote control cable. BTS
Port -accepts connector for remote battery temperature sensor cable.
MagnumNet Communication Port -accepts connector for Auto Gen Start or Smart Shunt (DC
current display) cable.
Positive Battery Terminal -provides 360 degree connection point for the positive (+)
cable from the vehicle’s batteries.
Negative Battery Terminal -provides 180 degree connection point for the negative (-
) cable from the vehicle’s batteries.
Chassis Ground Connector -accepts chassis ground cable.
AC Access Cover -provides access to internal AC screw terminal connections. AC
Input Circuit Breaker -protects main AC (shore power) input circuit.
AC Output 1 Circuit Breaker (optional) -protects the primary AC output circuit (on
dual out units only).
AC Output 2 Circuit Breaker (optional) -protects secondary AC output circuit (on
dual out units only).
ME Series Nameplate Label -provides product and safety information.
Ó 2003 -Magnum Energy, Inc. 5

2. INSTALLATION
1. Unpacking and Inspection
Carefully remove the ME Series inverter from its shipping container and inspect all
contents. If items appear to be missing or damaged, contact Magnum Energy at [phone] or your
authorized Magnum Energy dealer. If at all possible, retain the shipping container in the event the unit ever
needs to be returned for factory service.
ATTENTION: Electrostatic Sensitive Devices. Observe precautions for
handling.
2. Pre-Installation
Before installing the inverter, read all of the instructions and cautionary markings
contained in this manual.
NOTE: The inverter is heavy. Use proper lifting techniques during installation to
prevent personal injury.
Locating the Inverter
The inverter must be mounted in a clean, dry, ventilated environment where the ambient temperatures
will not exceed 122 ºF (50 ºC). The location must be fully accessible and protected from exposure to heat
producing devices. You can mount the inverter horizontally, vertically or upside-down. It must
be securely fastened to a shelf, bulkhead, or other structural part.
Allow enough clearance to access the AC and DC connection points as well as the
inverter’s controls and status indicator. As with any inverter, it should be located as
close to the batteries as possible. Longer battery cable runs tend to loose efficiency and reduce the overall
performance of an inverter.
If you are planning to install dedicated batteries, other than the vehicle’s, make sure
they are in a dedicated compartment that has ventilation to the outside. Also it is important that you never
mount the inverter directly above the batteries as theyemit corrosive fumes which could damage
the inverter’s electronics.
Locating Dedicated Batteries (optional)
Dedicated batteries must be mounted in a clean, dry, ventilated environment where they are protected
from high and low temperatures. The batteries must be mounted upright (if using liquid batteries) and
securely fastened to the vehicle. The location must be fully accessible and protected from
exposure to heat producing devices.
To ensure optimum performance, a ventilated battery enclosure is recommended. The batteries should be
located as close as possible to the inverter. Longer batterycable runs tend to loose efficiency and
reduce the overall performance of an inverter. Also, do not mount the batteries beneath the
inverter (or in the same compartment). Batteries emit corrosive fumes which could damage the
inverter’s electronics.
NOTE: For optimum performance, Magnum Energy recommends using AGM
(absorbed glass mat) batteries such as LifelineTM brand batteries.
CAUTION: Never locate dedicated batteries near the vehicle’s fuel tanks containing gasoline or
propane.
Ó 2003 -Magnum Energy, Inc. 7

2. INSTALLATION
2. Pre-Installation, continued
Hardware / Materials Required
Conduit, strain-reliefs and appropriate fittings
1/4" mounting bolts and lock washers Electrical tape
Wire ties
Tools Required
Misc screw drivers Level 1/2" wrench
Drill and drill bits Pliers Wire strippers
Level Pencil or Marker Multimeter
Wiring
Pre-plan the wire and conduit runs. For maximum safety, run both AC and DC wires/cabling in
(separate) conduit. Direct current wiring, due to its potential to generate RFI, should
be tied together with electrical tape. Wiring and installation methods must conform
to all applicable electrical codes.
NOTE: Run DC cabling in twisted pairs, keeping the runs as short as practical.
AC Connections
Use #10 AWG (or larger) THHN wire for all AC wiring. The inverter’s AC terminal
blocks accept up to #6 AWG wire.
DC Connections
Battery to inverter cabling should be only as long as required. If using #2/0 AWG
cables, do not exceed 5 feet (one way) for 12 VDC systems.
Crimped and sealed copper ring terminal lugs with a 5/16” hole should be used toconnect the
battery cables to the inverter’s DC terminals.
AC Grounding
The ME Series inverter/charger contains an internal neutral-to-ground switching
circuit for the AC electrical system.
WARNING: The AC shore power neutral must be grounded ONLY through the shore power cable. Do not
ground AC to the vehicle’s chassis.
DC Grounding
The inverter/charger should always be connected to a permanent, groundedwiring system. For the
majority of installations, the negative battery conductor is bonded to the vehicle’s
safety-grounding conductor (green wire) at only one point in the system. The size for the
conductor is usually based on the size of the largest conductor in the DC system. DO NOT connect the
battery negative (-) cable to the vehicle’s safety ground. Connect it only to the inverter’s
negative battery terminal. If there are any non-factory installed DC appliances on board
the vehicle, DO NOT ground them at the safety ground. Ground them only at the negative bus of the
DC load center (as applicable).
Ó 2003 -Magnum Energy, Inc. 8

2. INSTALLATION
2. Pre-Installation, continued
Torque Requirements
Torque all AC wiring connections to 16 inch pounds. Torque DC cable connections to
10-12 foot pounds.
AC Main Panel
If the installation will be powering a wide-range of appliances throughout the vehicle,
an AC main panel is often recommended. This is similar in appearance and function as your home’s
circuit breaker panel, providing an additional level of control and protection for the
various circuits. Always refer to electrical codes for safe wiring practices.
Circuit Protection
If using a AC main panel for distribution, always use breakers that provide the
correct ampere branch circuit protection in accordance with the National Electric
Code. The breakers must also be properly rated for the appliances that will be powered.
NOTE: Both AC and DC disconnects / overcurrent protection must be provided as part of
the installation.
Wire Routing
Determine all wire routes throughout the vehicle both to and from the inverter.
Conductors that are at risk to physical damage must be protected by conduit, tape, or placed in a
raceway. Conductors passing through walls, bulkheads or other structural members must be
protected to minimize insulation damage such as chafing. During the installation, always avoid
placing conductors near sources of chafing caused by vibration or constant rubbing.
CAUTION: Always check for existing electrical, plumbing or other areas of potential damage prior to
making cuts in structural surfaces, bulkheads or walls.
Typical routing scenarios are:
AC Input wiring from the shore power source to the inverter
AC Input wiring from a generator (optional) to the inverter
DC Input wiring from the batteries to the inverter
AC Output wiring from the inverter to the coach’s AC main panel or to dedicated
circuits
Battery Temperature Sensor cable (optional) from the inverter to the batteries
Remote Control cable (optional) to the inverter
Ground wiring from the inverter to an external vehicle ground
Ó 2003 -Magnum Energy, Inc. 9

2. INSTALLATION
Mounting Screw
Placements
Figure 4
ME Series Inverter / Charger Base Plate
Inverter ME1512 ME2012 ME2512 ME3012
DC Rating 150 amps 200 amps 250 amps 300 amps
@1 to 3 ft #2/0 AWG #2/0 AWG #4/0 AWG #4/0 AWG
@3 to 5 ft #4/0 AWG #4/0 AWG #4/0 AWG #4/0 AWG
@5 to 10 ft #4/0 AWG #4/0 AWG #4/0 AWG consult code
Table 2 -Recommended Battery Cable Sizing

10 Ó 2003 -Magnum Energy, Inc.

2. INSTALLATION
3. Installation
NOTE: Read all instructions and cautionary markings located at the beginning of this
manual and in the pre-installation section, before installing the inverter and
batteries.
CAUTION: Do not mount the inverter or the batteries near the vehicle’s gasoline or propane fuel
tanks.
Mount the inverter only on a “non-combustable” surfaces. Maximum abient temperature
MUST NOT exceed 113 °F (45°C).
For Canadian installations, the inverter’s vents must face downward.
Inverter Mounting
Position the inverter in the designated mounting location horizontally, vertically or
upside-down. Allow enough clearance to access the AC and DC connection points as well as the
inverter’s controls and status indicator. Also allow for air flow in to and around the
inverter, especially near the cooling fans (approximately 3”).
Mark the mounting holes in the base of the inverter’s chassis. Remove the inverter and drill
pilot holes into the mounting surface.
Secure the inverter to the mounting surface using appropriate screws andlockwashers.
Remove the inverter’s AC access panel in accommodate the AC Input and Outputwiring and
conduit.
Battery Installation
NOTE: To ensure the best performance from your inverter system, do not use old or untested batteries.
Batteries must be of the same size, type, rating and age.
NOTE: For optimum performance, Magnum Energy recommends using AGM
(absorbed glass mat) batteries such as LifelineTM brand batteries.
NOTE: If using Flooded Lead Acid batteries, they must be mounted upright.
CAUTION: Install batteries in a well ventilated area. Batteries can produce explosive
gasses. For compartment or enclosure installations, always vent batteries to the outside.
Place the batteries as close as practical to the inverter, preferably in an insulated
and ventilated enclosure. Allow adequate space above the batteries (+/-6” above the batteries) to access
the terminals and vent caps(as applicable). Also allow at least 1” of space between the batteries to provide
good air flow. DO NOT mount the batteries directly under the inverter.
Secure the batteries to the mounting surface with battery hold down clamps.
Ó 2003 -Magnum Energy, Inc. 11

2. INSTALLATION
3. Installation, continued
Battery Cables and Sizing
Select the correct battery cables for the installation from the table. It is important to use the correct
cable to achieve maximum efficiency from the system and reduce fire hazards associated with overheated
cables. Undersized cables can alsolower the inverter’s peak output voltage as well as reduce
its surge power capability. Long cable runs also reduce efficiency due to resistance in
the cable. Always keep your cable runs a short as practical.
Battery cables must be color coded with colored tape or heat shrink tubing: RED for positive (+);
BLACK for negative (-); and GREEN for DC ground.
The cables must have soldered and crimped lugs, crimped copper compressionlugs, or aluminum
mechanical lugs. Soldered connections alone are not acceptable for this application.
DC Wiring
Refer to the safety information at the beginning of the manual before proceeding. DC
wires and cables should be tied together with wire ties or electrical tape approximately
every 6 inches.
WARNING: De-energize all sources of power including batteries(DC), shore power (AC), and AC
generator (if applicable).
CAUTION: Inverter is NOT polarity protected. Verify proper polarity BEFORE connecting the battery
cables.
NOTE: DO NOT connect the battery cables to the inverter until all wiring is complete
and the correct DC voltage and polarity has been verified.
NOTE: Make sure cables have a smooth bend radius and do not become kinked.Place long cable runs
in conduit and follow existing wire runs where possible.
DC Grounding
Route a grounding cable (GREEN) from the inverter’s ground lug to a dedicated
vehicle ground.
Negative Cable
Route a negative cable (BLACK) from the house battery bank (or dedicated battery
compartment) to the inverter’s negative terminal
Positive Cable
Route a positive cable (RED) from the house battery bank (or dedicated battery compartment) to the
Fuse Block assembly (DC Disconnect). The DC disconnect is usually located next to or near the batteries.
DO NOT connect the positive cable to the batteries at this time.
Route a positive cable (RED) from the Fuse Block assembly (DC Disconnect) to
the
inverter’s positive terminal DO NOT connect the positive cable to the inverter at this
time.
12 Ó 2003 -Magnum Energy, Inc.

2. INSTALLATION
3. Installation, continued Battery
Wiring
WARNING: During the installation and wiring process, cover exposed battery cable ends with electrical
tape to prevent shorting the cables.
NOTE: DO NOT connect the positive cable to the inverter at this time.
Depending upon the type of battery you use in the installation (6 or 12 VDC), the batteries must be
wired in series, parallel or series/parallel to provide 12 VDC. The interconnecting battery
cables must be sized and rated exactly the same as those that used to connect the inverter.
When connecting the cable to the battery terminal, hardware should be installedin the following
order: bolt, ring washer, cable lug, (battery terminal), ring washer, lock washer, nut.
Tighten terminal connections to at least 10 to 12 foot pounds.
When two cables are connected to a terminal (i.e., negative terminal), the hardware should be
installed in the following order: bolt, ring washer, DC negative cable lug, inverter
negative cable lug, (battery terminal), ring washer, lock washer, nut.
Parallel Connection
(multiple 12 VDC batteries to create a 12 VDC string)
A parallel connection combines overall battery capacity by the number of batteries in
the string. Even though there are multiple batteries, the voltage remains the same. In the example on the
next page (Figure 7), four, 12 VDC, 100 AHr batteries are combined into a single string,
resulting in a 12 VDC, 400 AHr bank.
Connect the negative battery terminals together using short cables. Connect the
positive battery terminals together using short cables.
Connect the negative battery cable (BLACK) from the inverter to the negative
terminal of the end battery. At the same time, connect a DC ground cable betweenthe negative
terminal and the vehicle’s DC grounding bus.
Connect the positive (RED) battery cable from the inverter to the positive terminal of
the battery at the opposite end of the string. This is essential to ensure even charging and discharging
across the entire battery string.
NOTE: A fuse must be placed between the positive terminal and the positive (RED)
battery cable to the inverter.
Once the batteries are completely wired and tested, coat the terminals with anapproved anti-
oxidizing spray.
Ó 2003 -Magnum Energy, Inc. 13
Nut -Washer-Lug -Terminal -Washer-Bolt Nut -Washer-Lug -Inverter Terminal
Figure 5
Battery Hardware Installation Figure 6 Inverter Hardware Installation

2. INSTALLATION
TO 12 VDC
INVERTER
->
Figure 7
Parallel Battery Wiring
individual battery capacity = 100 AHr @ 12 VDC
combined battery capacity = 400 AHr @ 12 VDC
-
Figure 8
Series Battery Wiring
individual battery capacity = 200 AHr @ 6 VDC combined
battery capacity = 200 AHr @ 24 VDC
+
TO 12 VDC
INVERTER
->
Figure 9
Series/Parallel Battery Wiring
individual battery capacity = 200 AHr @ 6 VDC
+ + + +
+
>
12 VDC 12 VDC 12 VDC 12 VDC
- - - -
>
++++
6 VDC 6 VDC 6 VDC 6 VDC
----
>

combined battery capacity = 400 AHr @ 12 VDC
14 Ó 2003 -Magnum Energy, Inc.