External Shunt:
The inverter monitors both AC and DC current values, whether charging or
discharging (figures are approximate), by using internal or external shunts. A
shunt monitors partial current consumption, allowing the majority of current to
pass on heavier conductors. Programming shunt selection affects which shunt
the inverter is using to monitor DC current values. Single inverter systems use
their internal shunt to monitor system DC current values. When programming
single inverter systems select External Shunt None. Dual inverter systems use
an external shunt to monitor system current values. When programming the
shunt selection of a dual inverter system, the master inverter is programmed by
the remote installed in the monitor panel. The master inverter will be pro-
grammed as External Shunt This Inverter. The slave inverter will be pro-
grammed as External Shunt Other Inverter.
Fuel Gauge Cutout:
Battery chemistries and types have different static voltage readings at
different states of charge. The battery voltage may be used to determine an
approximate state of charge for that battery type and chemistry. The Fuel Gauge
Cutout voltage is a reference point the inverter uses to determine a battery with
no reserve capacity amp hours remaining. Changing the value of the Fuel
Gauge Cutout will affect the fuel meter, automatic generator start and stop
points if set by SOC (state of charge) and time left to run or charge. The Fuel
Gauge will read 0 when and the Fuel Gauge Cutout program voltage reaches
the 50% SOC battery voltage.
NOTE: The remaining field items are used to program the
Automatic Generator Start parameters.
The house batteries operate most of the interior lighting and most
appliances. As the house battery power is consumed the reserve battery capacity
diminishes. The inverter can be programmed to automatically start and stop the
generator to keep up with the drain on the house batteries. All field reference
points are house battery indications or conditions. A wide field of parameters
may be chosen for the generator start and stop points. These points may be set
in three categories:
1. House battery voltage.
2. State of charge (SOC). (The Fuel Gauge Cut-out affects SOC.)
3. Absorb or Float point of the charge cycle.
For example: The inverter can be programmed to start the generator when
house battery voltage falls to 11.4 Volts. As the battery voltage rises, the
inverter can be programmed to stop the generator when the house battery
Electrical Systems - House
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WINDSOR
8•202
Automatic
Generator Start
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