Magnum Energy MMS-E Series - Manual (Page 8)

© 2011 Magnum Energy, Inc. 1
1.0 Introduction
Congratulations on your purchase of an MMS-E Series inverter/char-
ger from Magnum Energy, Inc. This product is designed especially
for your mobile application. Powerful, yet simple to use, this product
will provide you with years of trouble-free use.
1.1 MMS-E Series Model
MMS912E - a 900 watt inverter/charger with 20 amp AC transfer
capability and a 40 amp/12 VDC, 4-stage Power Factor Correction
(PFC) charger. The AC input and output are provided with pigtail
wires to allow hardwiring to a main AC distribution panel and to an
inverter sub-panel. Features isolated input/output neutrals for mobile
applications. Includes a Battery Temperature Sensor (BTS) with a
15’ cable extension.
Figure 1-1, MMS912E Model Inverter/Charger
1.2 How an Inverter/Charger Works
An inverter takes direct current (DC) from your batteries and turns it
into alternating current (AC), like you use at home. With the MMS-E
Series model, it also takes alternating current (when connected to
a generator or to shore power) and transforms it into direct current
to recharge your batteries.
The two modes of operation associated with this inverter/charger are
referred to in this document as:
Inverter Mode: DC from the batteries is transformed into pure sine
wave AC for powering your mobile applications.
Standby Mode: The unit operates as a battery charger to convert incom-
ing AC power into DC power to recharge the batteries while continuing
to pass the incoming AC power directly to the inverter’s output – to
power any AC loads.
1.0 Introduction