OK

The inverter will do two things.... 1... it will take the DC battery voltage when unplugged and make AC voltage, the catch is it uses your battery voltage so if the batteries are weak then you are not going to get much out of the inverter. On most rigs they do have an inverter to power a few outlets a TV, but not the roof AC'S because the power demand is to great on the batteries, if you were running everything unplugged off the inverter it would not take long for the batteries to discharge.

2. The other function is when you are plugged in the inverter will charge the battery. One check you can do is unplug the shorepower cord, wait about 1 hour, get a voltage reading. Plug back in and watch the voltage at the battery, it should come up to around 13.5 volts and then maintain around 12.8 volts.....

I might be able to verify what works when using the inverter traveling down the road if you like? It will take me a few mins to get that information.....

Robert

I went ahead and got the specific information for your model....

NOTE: INVERTER
Your Owner’s Manual for RV750ULHW contains most of the essential information you need to enjoy the electrical
conveniences of home while at RV parks or dry camping. However, we wish to highlight for you exactly how the
charging portion of the inverter/charger works, in order to help avoid possible confusion:
Supplying shore power or, (optional) generator power enables the RV750ULHW to charge the auxiliary battery
(ies). Operation of your vehicle engine and alternator will also charge the auxiliary battery (ies). When your
motorhome is not plugged into shore power or, (optional) AC generator power, all electricity you use draws power
from your motorhome’s auxiliary battery bank, with the inverter allowing you to enjoy quiet DC-to-AC, (12 volt to
110 volt) power in the absence of shore or generator power.
10V inverter/charger shut down
As a safety feature, the inverter component of the RV750ULHW inverter/charger, (which changes DC battery power
to AC electricity) will shut itself down when your auxiliary battery bank drops below 10 volts DC. This occurs in
order to avoid excessive discharging and potential damage to the battery (ies), as well as to preserve sufficient
battery voltage to maintain the functionality and readiness of the battery charger component of the RV750ULHW .
It is possible, however, for the battery (ies) to become discharged below 10 volts DC as a function of activity other
than using the inverter. For example, while dry camping, in the absence of shore or generator power, if a 12 volt
appliance such as the furnace or lights are left on for an extended period of time. In that event, the battery
charger component of the RV750ULHW will become inoperative. Therefore, after plugging into shore power or
supply of, (optional) generator power, it is possible that the battery (ies) may not be recharging. The indicators of
this situation will be either completely dark LED lights on the monitor panel of the RV750ULHW inverter/charger, and
a continuously blinking red LED light on the battery voltage readout, or all three LED lights continuously blinking
on the battery voltage readout on the RV750ULHW.
Inverter/charger start up after automatic safety shut down
To remedy this situation, start the automotive engine, to allow the charger to sense a voltage of higher than 10
volts. The indicator of success will be a transition on the monitor panel from yellow inverted power LED light to
the green line power illuminated LED light.This may take up to 60 seconds. At this point the engine can be turned
off, because the charger has been activated and “takes over” the function of charging the battery (ies). Once
battery voltage has risen sufficiently for your purposes, (e.g., to the yellow, yellow-green, or green “full charge”
level), shore power or, (optional) generator power can be disconnected, although disconnection is not required;
the charger will automatically reduce the rate of charge to prevent the battery (ies) from becoming overcharged.
Dry camping battery conservation
While dry camping, (no 110 VAC power available) to conserve battery power, it is recommended to switch the
inverter to the off or charge position, if the inverter is left in the ON position, it will continue to draw 1.25 amps. To
ease in switching of the inverter, we have installed a clearly labeled remote switch located at the control panel
area.
Receptacle functionality (Inverter Circuits)
When using your motorhome and connected to shore power or optional generator, the receptacles in the
audio/video cabinet and in the galley will function to the 15 amp capacity supplied from the distribution panel.
However when no shore power or option generator power is available, these receptacles are limited to the 750
watts.
If an overload occurs, the inverter will shut down, and will need to be reset manually, by turning of the inverter off
for 1 minute, removing the load, and then turn the inverter back on.

Hope this helps some more... Robert