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Installation Option #3 for Freedom 20 D/D, 25 D/D and 30 D/D
The inverter is used in Dual Input / Single Output mode. The AC loads are split between
main loads and ‘inverter loads’. The external sources of AC power can be two different
30 Amp shorepower sources (both neutrals and both “Hots” must be kept separate) or
two 30 Amp breakers from a panel fed by a 50 Amp 120 Volt single phase (3 wire)
shorepower source, a 50 Amp 120/240 volt split phase (4 wire) shorepower source, or a
generator. The charger has its own 30 Amp source of power (AC input 1) and the other
30 Amp source (AC input 2) transfers through the inverter to the ‘inverter loads’ (AC
output 2). There is no power sharing between the charger and the ‘inverter loads’ in
this mode.
It is highly recommended that only the lighter appliance and outlet circuits be connected to the
Inverter AC Panel. These loads are supplied power through the inverter in transfer mode, or by
the inverter in invert mode. The heavier loads such as space heaters, stove, water heater, air
conditioners, AC to DC converters, or other battery chargers, should remain connected to the
Main AC Panel. These loads are only supplied by shore or generator power from the main
panel. This split load approach will help avoid problems such as overloading the inverter or
rapidly discharging the battery bank, and eliminate the need to manually manage the energy
usage of these loads when using inverter power.
The inverter AC Input #1 must be supplied power from a 30 Amp breaker and neutral in the main
panel and is used to power the charger only. AC Input #2 must be supplied by a second 30 Amp
breaker and neutral in the main panel which transfers through the inverter to AC Output #2.
These two input breakers can be supplied by the same phase or by opposite phases. The
inverter AC Output #2 supplies a separate sub panel. The appliance and outlet loads are then
supplied with power from the inverter hot and inverter neutral bus in the sub panel. AC Output
#1 is not used and must be capped off.
If a generator is installed in the system, a break-before-make AC transfer switch is used to se-
lect between shore or generator power. The transfer switch AC output is then routed to the Main
AC Panel.
If only AC Input #1 is supplied power, the unit will charge and power share with and transfer
power to the loads on AC Output # 2.
If only AC Input #2 is supplied power, the unit will not charge, and will only transfer 30 Amps
through to the inverter loads connected to AC Output #2.