Operation; Inverter Power Mode; External Power Mode - Sensata dimensions 12NP18 Owner's Manual

OPERATION

Inverter Power Mode

The 7-segment display panel "On/Off " key or a voltage between 8 and 15 volts applied to the "Remote On/Off "
input tab controls the inverter.
The 7-segment display panel "On/STBY" LED will be green, and the status LED will blink amber while the
inverter is on. The AC power produced by the inverter comes from the energy stored in the battery bank. A
transformer, a Metal Oxide Silicon Field Effect Transistors (MOSFET), a filter capacitor, and microprocessor
control are used to generate clean AC power with THD <5%.
The inverter will operate at DC input voltages ranging from the low battery setpoint to 16 volts. Above 16 volts,
the system will stop operating due to input voltage being out of range. The inverter can tolerate up to 16 VDC
input. Low battery cutout (LBCO) may vary for different battery types and manufacturers. Reference the battery
manufacturer for the recommended LBCO setting. When the input voltage drops below the LBCO, the inverter will
stop operating due to a low battery condition.
NOTE: Inverters have a large capacitance on the DC input terminals. If the capacitors are discharged when
LFP batteries are connected, a large inrush current may occur. The inrush current may cause the BMS within the
LFP battery to immediately disconnect. This issue will occur if the amount of connected battery amp-hrs is not
sufficient to support the inverter size.

External Power Mode

The 7-segment display panel will show charger mode and output and the status LED will blink green indicating
that there is a valid external AC power line applied to the inverter AC input. There may be a 30 second delay before
charge or bypass is enabled while the AC input power is qualified.
Bypass Relay
The loads attached to the inverter output will operate directly from the external AC power line independently of
the inverter on/off status. If the inverter is left on (standby mode), the built-in bypass relay will automatically cycle
back and forth between "inverter power" and "external power" mode depending on the availability of the external
AC power line.
Battery Charger
WARNING: Customer must match battery type with charger battery type.
The battery charger will engage automatically and independently of the inverter on/off status.
NOTE: When in charge mode, the charger may not be able to charge at its full capacity if AC power is being used
in bypass mode.
NOTE: The charger is capable of charging AGM, gel, wet lead-acid, or LFP batteries. The battery type may also
be set via the 7-Seg Display, the optional LCD remote display (sold separately), or RV-C CAN. Contact factory for
further details on RV-C CAN. The LCD part number may be found in the Appendix.
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12NP Manual