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Old 09-27-2017, 03:49 PM   #15
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Originally Posted by CountryFit View Post
people were talking about all kind of scenarios, one of those is that the generator is single phase no 240v output... to gurantee the availability of 240v either on or off shore, the two models of the inverter i suggested will do the job.

of course we all know 50am shore power will have 240v, as only as the coach is wired properly and ats is working.


It's not likely that anyone would have the necessary battery bank capacity to be able to provide power adequate for a dryer of any kind.
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Old 09-27-2017, 04:00 PM   #16
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My rig came with the 12.5 Onan and a 240 volt dryer. Have owned the rig 2 1/2 years and have yet to even try the dryer. With the late DW's poor health, death and still having an almost 18 yr old step grandson at home I haven't been able to get away for long enough. Hopefully, sometime in the future things will change.
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Old 09-27-2017, 06:20 PM   #17
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My rig came with the 12.5 Onan and a 240 volt dryer. Have owned the rig 2 1/2 years and have yet to even try the dryer. With the late DW's poor health, death and still having an almost 18 yr old step grandson at home I haven't been able to get away for long enough. Hopefully, sometime in the future things will change.
Mr. D,
Sorry about your wife. Hopefully you will get back out and start "roughing it" again. I always enjoy reading what you post.
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Old 09-27-2017, 06:26 PM   #18
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We have a 240 volt dryer in our DRV 5er. It works just like the one at home. I also installed a commercial Onan 6500 watt lp generator that is two phase (produces 240 volt). This allows me to run the dryer on 50 amp shore power or generator power. It all works as designed.

It is a fairly simple matter to add a 240 volt plug to your 50 amp power panel if it is the correct style panel. It needs to be a panel that has the double pole 50 amp feed breaker at one end of the panel box and then each subsequent breaker is on an opposing line (line 1, then line 2, then line 1, then line 2, etc.). You then need two free slots in the panel that are next to each other, one from line 1 and one from line 2. Simply add the appropriate sized double pole breaker and run the correct sized wire from the breaker to the proper 240 volt plug wher the dryer will be located. It is no different than installing the same set up in your home.

The plug will only work when you have two phase power available, like a 50 amp cord plugged into a 50 amp power pedestal. (Or in my case a two phase generator option.). It will not work when plugged into a single phase outlet like a 30 amp power pedestal or a 15/20 amp receptacle.
Thanks for the reply. My question is with a residential fridge and 3 ac units, how can shore power of 50 amps keep up when the dryer turns on? Does the inverter help or does some type of computer system regulate the ac's?
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Old 09-27-2017, 06:34 PM   #19
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The ease [or not] of converting depends on what you now have. Many 50A rigs do not have a load center (breaker box) that supports the use of 240v breakers on the bus bars, even though there is in fact 240v available at the input terminals. You could always install a secondary panel with 240v-capable bus bars, though.

Some RV gensets, e.g. the popular Onan QD 7500/8000 model, do not provide 240v output even though they generate more than 50A. The QG 7000 is another like that. They have 2x 120v power lines, but no way to get 240v.

If you do already have a 240-capable load center, it's as simple as installing the twin-30A breaker and running the 10/3 wire to the dryer location.
Thanks for the info and I have an Onan 10k gen. What about the 50 amp shore power when I am running 3 ac's and the residential fridge is on? Will I cause an over load if the dryer kicks on?
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Old 09-27-2017, 10:34 PM   #20
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Thanks for the reply. My question is with a residential fridge and 3 ac units, how can shore power of 50 amps keep up when the dryer turns on? Does the inverter help or does some type of computer system regulate the ac's?
You may or may not have an issue. Some coaches come with power management systems that will shut down various loads in a particular order when the demand on the system is high, then restart those loads when the demand goes down. I don't know if your rig has that feature or not. My DRV does. First it drops the electric water heater, then it drops the compressor on one of the three AC's then it drops the compressor on a second AC and so on. Once the power demand diminishes, it restarts the loads in reverse order.
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Old 09-27-2017, 11:15 PM   #21
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It's not likely that anyone would have the necessary battery bank capacity to be able to provide power adequate for a dryer of any kind.
agreed. 240v dryer is gonna be an energy hog. maybe a huge battery pack with running genset when dryer is in use and no shore power?
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Old 09-28-2017, 04:12 AM   #22
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Thanks for the info and I have an Onan 10k gen. What about the 50 amp shore power when I am running 3 ac's and the residential fridge is on? Will I cause an over load if the dryer kicks on?
Your 50 amp 120/240 volt shore power is actually 100 amps at 120 volts.

The 30 amp dryer will be drawing 15 amps from each leg, leaving you 35 on each for other stuff.

It all depends on what your running. 2 AC will be on one leg, using up 35 amps of that leg, so some cutting back may be needed.

My understanding is that energy management systems only manage theloads when they sense 30 amp, 120 power from the shore cord.

I may be wrong and if so, you should be able to adjust the load sharing device to keep the dryer running and shut down an AC or water heater during that time.
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Old 09-28-2017, 06:02 AM   #23
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It's not likely that anyone would have the necessary battery bank capacity to be able to provide power adequate for a dryer of any kind.
Hi Steve,
I do not think the battery bank supports the dryer, please elaborate
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Old 09-28-2017, 06:06 AM   #24
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Your 50 amp 120/240 volt shore power is actually 100 amps at 120 volts.

The 30 amp dryer will be drawing 15 amps from each leg, leaving you 35 on each for other stuff.

It all depends on what your running. 2 AC will be on one leg, using up 35 amps of that leg, so some cutting back may be needed.

My understanding is that energy management systems only manage theloads when they sense 30 amp, 120 power from the shore cord.

I may be wrong and if so, you should be able to adjust the load sharing device to keep the dryer running and shut down an AC or water heater during that time.
I was not aware of the 100 amp total. The energy management system makes sense and I do not think I have that.
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Old 09-28-2017, 08:01 AM   #25
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I believe a 30 amp 240volt dryer will pull 30 amps on each leg hence the double pole 30 amp breaker. 60 amp total.
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Old 09-28-2017, 08:12 AM   #26
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I believe a 30 amp 240volt dryer will pull 30 amps on each leg hence the double pole 30 amp breaker. 60 amp total.


You are correct. Hence the reason that few RV manufacturers go the 240 VAC route for a dryer.
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Old 09-28-2017, 09:36 AM   #27
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Duu, I should have had my second pot of coffee this morning. Yes, it will draw 30 amps per leg.
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Old 09-30-2017, 05:52 PM   #28
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Note that a typical 240VAC dryer won't draw more than 5kW (about 21 amps per leg) peak.
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