Refrig. on DC ?

When pluged into AC,will the charger keep up with the battery drain of running the refrig. and the fan. I plan on leaving early and want the TM already hooked up and closed up so all I have to do is plug it into the TV.
Thanks Ed

[Bill]

Yes. The converter is capable of supplying about 30 amps directly to the 12-volt system. The consumption of the refrigerator plus the little fan is 11-12 amps.

Bill

Thanks Bill

[mjlaupp]

The 12vdc circuits are isolated from the battery by a relay when the AC shore line is plugged in. You are then running the frig and fan directly off of the converter with no battery drain.
MJL

[quote author=Mike Laupp link=board=1;threadid=2105;start=msg14711#msg14711 date=1089514642]
The 12vdc circuits are isolated from the battery by a relay when the AC shore line is plugged in. You are then running the frig and fan directly off of the converter with no battery drain.
MJL
[/quote]

If that's the case, why do we have the option of AC as a power source on our fridge controls? Is it because not all RV manufacturers have the same kind of electrical configuration (with a relay)? Does this mean I don't have to worry about remembering to change the fridge from battery (for travel) to AC once we're hooked up to shore power?

Thanks,

Sally (and the Aussies )

You should change to AC or gas when set up, it is far more effincient and allows you to cool better. The DC power is just a little weak.

[mjlaupp]

[quote author=Simon3xUD link=board=1;threadid=2105;start=msg14737#msg14737 date=1089585357]
If that's the case, why do we have the option of AC as a power source on our fridge controls?[/quote]
Ac power is much more efficient as a power source for the frig. The frig will get colder faster and stay colder when on AC power.

Is it because not all RV manufacturers have the same kind of electrical configuration (with a relay)?

Most RV manufacturers use the same type of converter. Most of these converters isolate the battery from the 12vdc circuits when on AC power.

Does this mean I don't have to worry about remembering to change the fridge from battery (for travel) to AC once we're hooked up to shore power?

If you leave the frig on 112vdc power you will work the converter harder. The energy expended to convert the 110vac to 12vdc will be released as heat. The converter cooling fan will come on more often sending this heat into the TM via the vents on the front of the power center in the hallway. At some point the 12vdc circuits (lights, fans, 12vdc TV, etc.) will start loading the converter down and your frig will get even more inefficient (warmer).

MJL

Ac power is much more efficient as a power source for the frig. The frig will get colder faster and stay colder when on AC power.

If you leave the frig on 112vdc power you will work the converter harder. The energy expended to convert the 110vac to 12vdc will be released as heat. The converter cooling fan will come on more often sending this heat into the TM via the vents on the front of the power center in the hallway. At some point the 12vdc circuits (lights, fans, 12vdc TV, etc.) will start loading the converter down and your frig will get even more inefficient (warmer).

MJL

Ah, it all makes sense to me now :-). Thanks for the education Mike!

Sally

from what I can tell the freezer will get almost 18 degrees colder with 110 vac than it does with 12 vdc