Magnum Energy ME-RTR Router - Manual (Page 37)

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©
2014 Magnum Energy, Inc.
Setup
Notes on using the AC In feature based on VDC or SOC:
1. The AC In –VDC and AC – In SOC features 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 (e.g.,
cloudy day).
2. The energy source should be sized to meet the daily power requirements of the loads being
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 Inverter Always Power-Up When DC is Connected: 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: NO
Range: YES, NO
What is the Always Power-Up feature? Normally, when DC power is connected to the inverter,
the user is required to press the inverter’s or the router’s power button to turn on the inverter.
If the Always Power-Up feature is activated by selecting “YES”, then whenever DC power is
connected, the inverter is automatically turned on and starts searching or inverting—depending
on the SETUP button’s 02 Inverter Setup/02A Search Watts setting. Once automatically turned
on, the power button on the inverter or router can be used to turn the inverter on or off.
Why use the Always Power-Up feature? Some people are familiar with Uninterruptable Power
Supplies (UPS) that power-up automatically when DC power is connected. The Always Power-Up
feature allows the inverter to power-on similar to an UPS.
• 02G Inverter Threshold to Start Parallel (or, the “parallel threshold”): This setting
is used for inverters in a parallel-stacked inverter system, and determines when the slave
inverters turn on as a result of the percentage of power being provided by the master inverter
Default setting: 60%
Range: OFF, 30%-90% (10% increments)
Info: Ensure the parallel threshold setting is not too high or the master inverter may
reach its full output capacity and overload before the slave inverters can turn on and
assist in powering the loads.
Info: The 02G Inverter Threshold to Start Parallel feature only works with the parallel
stacking inverter models (i.e., MS-PAE and MS-PE Series).
Info: When this setting is reached, all connected slave inverters turn on at the same
time to deliver maximum power to the loads. After running approximately 30 seconds
to stabilize the AC current, the slave inverter(s) that are not needed will shut down and
the units that are still inverting will share the AC current equally.
Example: There are 3 MS4024PAE units in parallel (Master, Slave 1, and Slave 2) with a total
capacity of 12kW—the parallel threshold default is set to 60%. The master inverter is running a
2000W load, which is below the 60% threshold (4000W x .6 = 2400W). A 1000W load is added
for a total system load of 3000W, exceeding the parallel threshold setting of 2400W. Slave 1 and
Slave 2 inverters turn on, delivering up to 12,000W total power. Within approximately 30 seconds,
the system shuts down Slave 2, and the Master and Slave 1 each run 1500W (sharing the 3000W
load equally between them). Now, if the 1000W load is turned off (reducing the total system load
to 2000W again), Slave 1 turns off and only the Master inverter will be running the 2000W load.