Magnum Energy ME-RTR Router - Manual (Page 90)

©
2014 Magnum Energy, Inc. Page 82
Using an AGS Module: Setup
Why would I use Gen Run AC Amps? This feature is designed to prevent the battery from being
heavily discharged by monitoring the battery current used to power the inverter loads (shown in AC
amps). When the AC current exceeds the Start AC Amps setting, a generator autostart is initiated.
After the generator connects to the inverter, the current from the generator is now used to run the
loads instead of the battery current. This feature is useful when there is occasionally a large load
or combinations of loads that the inverter is able to run, but by doing so would quickly deplete
the battery bank. Typically, these large loads might be motors, well pumps, A/C units, or freezers.
Info: The 04C Gen Run AC Amps feature is not designed to turn on the generator to
power loads above the capacity of the inverter. If attempting to run loads above the
inverter capacity, the inverter may overload and shut down before the generator can
autostart and power the heavy load thru the inverter.
Where should I set Gen Run AC Amps? Typically, the generator should autostart when the
AC load amps is >70-75% of the inverter AC current output rating¹. This keeps the inverter from
running too large a load and also keeps the batteries from cycling unnecessarily. Set Stop AC
Amps just below the start amps to ensure the large load has turned off. Set the start delay time
so surge loads don’t trigger a false start, and the stop delay time is long enough to ensure the
load has turned off.
Example: In this scenario, most AC loads typically do not exceed 20A when in Inverter mode.
When a freezer or well pump starts, the load exceeds 30A so the battery voltage starts to quickly
drop. Instead of cycling the batteries to a low voltage, set Start AC Amps to 25A with a 60-second
delay (using Start Delay setting). Set the Stop AC Amps menu to 20A with a 60-second delay
(using Stop Delay setting). After 60 seconds of detecting a larger than 25A load on the inverter,
the generator autostarts and powers the loads and recharges the batteries. Once the AC amps
load drops below 20A for 60 seconds, the gen turns off.
SETUP: 04D Gen Run SOC Menu
This menu starts and stops the generator based on the SOC (State of Charge) reading from the
attached battery monitor, as shown on the METER button’s 05A BMK SOC display. This is the
best method for using AGS settings to start/stop your generator. Since the ME-BMK already uses
voltage, time, and current to determine the true SOC of the batteries, there is little guesswork or
calculating needed to determine what settings to use.
• Set Gen Run SOC (Start SOC) – This menu sets the SOC level for autostarting the generator.
Default setting: Start SOC = OFF
Range: OFF, 20%-99%
• Set Gen Run SOC (Stop SOC) – This menu sets the SOC level for autostopping the generator.
Default setting: Stop SOC = 90%
Range: 21%-100%
Info: There is no start or stop delay time needed since the ME-BMK already displays an
accurate state of charge of the batteries.
Info: The optional Battery Monitor Kit (ME-BMK or ME-BMK-NS) must be installed and
enabled to use the 04D Gen Run SOC autostart/autostop feature.
Info: When using the 04D Gen Run SOC autostart/autostop feature, the generator
autostarts and runs until the battery bank has reached the Stop SOC setting or the
AGS’s SETUP: 04F Max Gen Run Time setting is reached, whichever occurs fi rst. Ensure
the charger never leaves the Bulk/Absorption charge mode. This is done by ensuring
the SETUP: 03 Absorb Done selection is “SOC” and the setting is greater than or equal
to the Stop SOC setting; and either set the Max Gen Run Time setting to OFF, or set it
long enough to ensure the generator is able to run until the battery is fully charged. If
the charger is allowed to exit the Bulk/Absorption charge mode (i.e., go to Float/Silent),
the battery SOC may never reach 100%.
Note¹ – For a 4000 watt inverter, this would mean setting Start AC Amps at 25A.