Installation Manual

ManualsBrandsMagnum Energy ManualsInverterMagnum Energy RD3924 Inverter

Page 24

Setup

Notes on using the AC In control settings based on VDC or SOC:

1. The AC In - VDC or AC In - SOC settings allow you to optimize the use of another energy

source (i.e., solar, wind, and/or hydro), and only allow the use of the utility power when the

energy source is not able to keep up with the load demands under normal conditions (i.e.,

cloudy day).

2. The energy source should be sized to meet the daily power requirements of the loads be-

ing operated under normal conditions. Otherwise, the inverter would be connected to utility

power most of the time, resulting in excessive energy consumption from the utility.

3. The inverter system should not be conﬁ gured for use in a utility back-up scenario. Otherwise,

the battery may be in a highly discharged state when grid power goes down—preventing the

critical loads from running during a power outage.

4. The incoming AC is normally disconnected from the inverter. The Connect setting (VDC or

SOC) must be reached before the inverter will allow the incoming AC to connect.

• 02F Power Up Always – Forces the inverter to turn on when DC voltage to the inverter is

applied. Allows the inverter to power up and provide AC power automatically once the battery

is connected to the inverter.

Default setting: OFF

Range: OFF, ON

What is the Power Up Always feature? Normally, when DC power is connected to the in-

verter, the user is required to press the inverter’s or the remote’s power button to turn on the

inverter. When this feature is activated by selecting “ON”, the inverter is automatically turned on

and starts searching or inverting—per the SETUP: 02 Invert SETUP: 02A Search Watts setting.

Once the inverter has connected to DC power and is automatically turned on, the power button—

on the inverter or remote—can be used to turn the inverter on or off.

Why use the Power Up Always feature? Uninterruptible Power Supplies (UPS) power-up au-

tomatically when DC power is connected. The Power Up Always feature can be used by customers

that want to duplicate this automatic power-up functionality.

SETUP: 03 Charger Setup

• 03A AC Input Amps – This setting ensures that the combined current draw from the battery

charger and the AC loads does not exceed the maximum input current that is available from

the incoming AC power. This setting is used to set that maximum input current level.

Whenever the incoming AC is connected and passing through the inverter, the current used to

power the AC loads and charge the batteries is monitored. If this current begins to approach

the AC Input Amps setting, the charger current is automatically reduced. This ensures the AC

loads have all the available current from the incoming AC power when needed.

If using a MSH-M or MSH-RE (Hybrid) inverter, the AC input settings also determine when

the battery current begins to operate in parallel with the incoming AC power to support the

inverter loads (i.e., Load Support). The Load Support feature uses additional power from the

inverter’s battery to run loads greater than what the incoming AC power can run alone, and

prioritizes the power of any external DC source (i.e., solar, wind, etc.,) over the incoming AC

power to run inverter loads. For more information, see the Load Support Mode section in the

MSH-M or MSH-RE Series owner’s manual.

Setting for all models except MSH4024RE:

◊ Set AC Input Amps

Default setting: 30 Amps

Ranges: 5-60 Amps (one amp increments)

Settings for MSH4024RE:

◊ Set AC Input Amps (AC1 and AC2)

Default settings: AC1=30 Amps, AC2=20 Amps

Ranges: 5-60 Amps (one amp increments)