Magnum Energy AGS Network (ME-AGS-N) - Manual (Page 69)

63 © 2012 Magnum Energy, Inc.
10.0 Using the ME-RTR Router
Default setting: Set Start Gen Volts = 11.5 VDC (12v), 23.0 VDC
(24v), 46.0 VDC (48v)
Range: OFF, 9.0-15.9 VDC (12v), 18.0-31.8 VDC (24v), 36.0-63.6 VDC
(48v)
Where should I set Start Volts? When setting the VDC start voltage, it
must be high enough to not over-discharge the battery, but also low enough
to keep from nuisance starting the generator. Typically, start volts is set
based on what is determined to be approximately 50% of the battery ca-
pacity. Since this is an inverter/battery system, and the battery is normally
loaded, the VDC used to determine 50% battery capacity should be set lower
than what is shown on typical battery voltage SOC charts (approximately
11-11.5 in a 12-volt system), which show the battery at rest (not loaded).
Example: Using a 12-volt battery as an example, a typical SOC (State of
Charge) battery chart will show that 12.2 VDC is considered 50% SOC. This
voltage is a battery “at rest,” meaning it has no load connected and has been
at rest for a minimum of 30 min. While this voltage is accurate under these
at rest conditions, this same voltage with a load applied means the battery is
well above 50% SOC, and should be set much lower. The larger the battery
bank the less the voltage will be affected by a load applied to the battery
bank. A typical start voltage setting would be between 11.0 VDC - 11.5 VDC
for a 12-volt system.
• Set Start Volts Delay – This setting determines how long the Start
Gen Volts parameter must be continuously maintained before autostart-
ing the generator. This ensures the generator does not nuisance start.
By setting a delay, momentary surge loads will not start the generator
when the battery voltage dips due to the heavy load applied to the
battery.
Default setting: Set Start Volts Delay = 60 Seconds
Range: OFF, 1 - 120 Seconds, 3 - 127 Minutes
Where should I set Start Volts Delay? First, determine what loads will be
running when the generator needs to start. The larger the load the shorter
the delay time setting. When a large load is applied to the battery bank the
battery voltage will drop quickly, so the delay time should be short to ensure
the batteries are not over-discharged. If you are not sure what loads might
be running or where to set the start time delay, error on the side of setting
a shorter time such as the default of 2 minutes (to protect batteries from
over-discharge).
• Set Stop Gen Volts – This setting will stop the generator when the
battery voltage (on Terminals #3 & #4) increases to or above this set-
ting continuously for the duration of the Set Stop Volts Delay setting. To
allow the battery bank to go through a full Bulk and Absorption charge,
this setting should be set to Float.
Default setting: Set Stop Gen Volts = 14.4 VDC (12v), 28.8 VDC
(24v), 57.6 VDC (48v)
Range: OFF, 9.1-16.1 VDC (12v), 18.2-32.2 VDC (24v), 36.4-64.4 VDC
(48v), Float
Where should I set Stop Gen Volts? Typically, when using a generator
to charge batteries, most individuals only charge the batteries to 80-85%
to compromise between minimizing fuel usage and maximizing battery life.
This is done by having the generator start on low battery voltage, and then
stop at a higher voltage (i.e., the Stop Gen Volts setting). When deciding