Magnum-energy MS Series User Manual download pdf (Page 14)

Installation

1.2 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.

1.2.1 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.

1.2.2 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.

Figure 1-4, Left Side Features (MS2000 Series)

AC Access Cover

AC Input Circuit Breaker

AC Output Circuit Breakers

(on -15B, -20B output

breaker models only)

Note1: The model shown is not a -15B or -20B model, therefore it does not show any AC output breakers

Models without output breakers (CB1 & CB2) use carriage bolts to ﬁ ll the breaker openings.

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Magnum-energy MS Series User Manual Page 14