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1.1
How an Inverter/Charger Works
There are two modes of operation associated with this inverter/charger:
Inverter Mode
When the inverter is properly connected to batteries and turned on, the direct current (DC) from
the batteries is transformed into a pure sine wave alternating current (AC). This AC is similar to
the voltage provided by your utility and is used to power any electrical appliances (i.e., AC loads)
connected to the inverter's output.
Standby Mode
When an external source of AC power (i.e., utility power or generator) is connected and qualifi ed
on the inverter's AC input, it operates in Standby mode. In Standby mode, the unit operates as
a battery charger to convert the incoming AC power into DC power to recharge the batteries;
and at the same time, automatically closes an internal AC transfer relay to pass the incoming AC
power directly to the inverter's output to continue powering the connected electrical appliances.
1.1.1
Inverter Applications for Permanent Installations
An inverter can be used for backup power in a permanent location that normally uses utility power,
such as a home or offi ce. When utility power is available, the inverter keeps the batteries charged.
When the utility power fails, the inverter comes on automatically to supply AC power to your home
or offi ce during the power failure. For a home or business, reliable backup power is needed to
prevent lost computer data, or to maintain lights and keep food fresh in the refrigerator/freezer.
In some areas, where utility power is not available, this inverter can be used in a standalone
renewable power system. The inverter allows AC electrical appliances to be run from the storage
battery bank. When the battery bank becomes discharged, either renewable DC sources (solar,
wind, or hydro power) can be used to recharge the batteries, or a generator can be connected to
the inverter to power the system while the batteries recharge.
1.1.2
Inverter Applications for Mobile Installations
Inverters can also be used to provide power in mobile situations, such as in an RV, truck, or boat.
In these applications, the inverter provides power to the AC loads using the energy stored in the
batteries and recharges the batteries when shorepower or an onboard generator is available.
1.2
Advantages of a Pure Sine Wave vs a Modifi ed Sine Wave Inverter
Today's inverters come in three basic output waveforms: square wave, modifi ed sine wave (which
is actually a modifi ed square wave) and pure sine wave (see Figure C-1 in Appendix C). Modifi ed
sine wave inverters approximate a pure sine wave form and will run most appliances and electronics
without any problems. These inverters are less expensive, and therefore, off er a viable alternative
to more expensive pure sine inverters.
The output of the MS Series inverter—which is pure sine wave—is equal to, or in many cases,
better than the utility power used in your home. Virtually any electronic device will operate from
a pure sine wave inverter. Motors run cooler, microwaves usually cook faster, and clocks keep
better time just to name a few examples. Without compromising quality or performance, the
MagnaSine provides you with all the advantages of a pure sine wave inverter at a much lower
cost than many on the market.
The MS Series is built on the same platform as our popular ME and RD Series modifi ed sine
wave inverters—allowing for an easy upgrade to a pure sine wave inverter from the original ME
or RD Series installation. This standard platform also helps reduce cost by using standard parts/
accessories across many models. Sensata accessories such as the Advanced Remote Control (ME-
ARC), Standard Remote Control (ME-RC), Automatic Generator Start – Networked (ME-AGS-N),
and Battery Monitor Kit (ME-BMK) can be used (see Section A-6 in Appendix A).
© 2016 Sensata Technologies
Introduction
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