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Old 04-18-2013, 03:37 PM   #21
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Our current trailer is the first trailer we have owned that has a water heater that is both electric & propane..... I tend to leave it on gas just habit... It uses so little gas that I don't tend to think about it. If it were not for the furnace just using gas for the stove, grill, oven & water heater I usually only refill the tanks once a season.... Didn't think about the 30A service think I may just leave it on gas......

Found out today with my EMS panel meter that when in electric mode my 10 gal DSI water heater draws 11-12 amps.
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Old 04-19-2013, 09:36 AM   #22
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Found out today with my EMS panel meter that when in electric mode my 10 gal DSI water heater draws 11-12 amps.
whoa. I had no idea it would be that high!
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Old 04-19-2013, 09:45 AM   #23
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whoa. I had no idea it would be that high!
Me either but after I showered last night it kicked on again"electric" only and was 12 amps draw according to the EMS Led panel.
Converter was drawing one amp before that.
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Old 04-19-2013, 09:50 AM   #24
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When it warms up here next week I'm going to go through all my device's and chart there amp usage so I have a guide as to what all my things run for gennie use.
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Old 04-19-2013, 09:56 AM   #25
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Me either but after I showered last night it kicked on again"electric" only and was 12 amps draw according to the EMS Led panel.
Converter was drawing one amp before that.
Wow, that's efficient! Imagine a home water heater drawing 90 amps? (10X larger) Maybe time to locate a close by supplier of propane who delivers......
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Old 04-19-2013, 10:11 AM   #26
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Wow, that's efficient! Imagine a home water heater drawing 90 amps? (10X larger) Maybe time to locate a close by supplier of propane who delivers......
I have a 1000 gallon tank full on site.
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Old 04-19-2013, 10:29 AM   #27
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I always use both, but remember to switch the electric off before you plug the trailer in at the post so you don't get arcing,
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Old 04-19-2013, 10:38 AM   #28
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I always use both, but remember to switch the electric off before you plug the trailer in at the post so you don't get arcing,
With an Ems system you don't have to worry about that.
As there is a delay after plugging cord in before power is applied to the camper.
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Old 04-19-2013, 10:40 AM   #29
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I always use both, but remember to switch the electric off before you plug the trailer in at the post so you don't get arcing,
I was told a long time ago to turn off the breaker at the post before plugging in.

Would that prevent this arcing?
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Old 04-19-2013, 11:12 AM   #30
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I was told a long time ago to turn off the breaker at the post before plugging in.

Would that prevent this arcing?
Yes, turning off breaker at the post is recommended practice. I turn off before I unplug as well.

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Old 04-19-2013, 08:47 PM   #31
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Originally Posted by f1100turbo

I have a 1000 gallon tank full on site.
Wow is that water or propane?
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Old 05-03-2013, 07:50 AM   #32
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First time with an RV that had both electric and propane as a heating choice..

So, if you have both electric and propane turned, what will the water heater use to warm the water. Electric or propane or use both at the same time?
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Old 05-03-2013, 07:57 AM   #33
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Wow is that water or propane?
Propane !
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Old 05-03-2013, 07:58 AM   #34
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First time with an RV that had both electric and propane as a heating choice..

So, if you have both electric and propane turned, what will the water heater use to warm the water. Electric or propane or use both at the same time?
Electric if your on shore power
Gas if your not on shore power
Both at the same time for quicker recovery when taking showers "while hooked to shore power" of course.

If both are turned on with shore power they will both work together.


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Old 05-03-2013, 08:34 AM   #35
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Electric if your on shore power
Gas if your not on shore power
Both at the same time for quicker recovery when taking showers "while hooked to shore power" of course.

If both are turned on with shore power they will both work together.


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Expounding just a hair on Turbs great answer:

The propane side heats water quicker than the electric heating element side.

If you turned them both on at the same time initially, when all the water in the tank is cold, they both start heating the water. Once the water get's to it's hot temperature, the thermostat for the propane and the thermostat for the heating element will turn off each prospective side.

The electric heating element will now usually be all that is required to keep the water hot in the tank during standby times....so propane won't turn itself on.

However, once you start taking a shower, washing dishes or something else that requires hot water........as the temperature inside the hot water heater drops from hot water leaving and cold water entering to replace it...then the electric heating element will come on.

If the propane sides thermostat senses too much of a temperature drop, it will also turn the propane burner on too, in essence giving the system a faster boost to heat the water again. The propane side will stay on as long as required to heat the water again to it's set temperature till the thermostat senses it and turns it off again.

So if you have them both turned on, the system will use either one or both together as needed....according to each sides thermostats.
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Old 05-03-2013, 08:51 AM   #36
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...
So if you have them both turned on, the system will use either one or both together as needed....according to each sides thermostats.
Personally, if I'm on shore power, I don't want it to do that (in general). Electric is free. Propane isn't (even if it doesn't use much).
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Old 05-03-2013, 08:54 AM   #37
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Wow is that water or propane?
Not uncommon to see that large of a propane tank in rural areas. They are seen often around here in small ranches and buildings where they are no underground pipelines.
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Old 05-03-2013, 09:07 AM   #38
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Personally, if I'm on shore power, I don't want it to do that (in general). Electric is free. Propane isn't (even if it doesn't use much).
Very true. However on 30 amp rigs, using the electric heating element (9-13 amps average) can limit you on other things. You usually can never run the air-conditioner, microwave, and electric heating element at the same time.

It's all just a tradeoff, and everyone has to decide for themselves what they want to save in propane costs vs expending energy to turn other AC powered things off when using the heating element.

I think everyone here who is experienced with 30 amp rigs, already know what they can and cannot use at the same time...and thus have adjusted their camping lifestyles to fit.

I use the electric heating element until it's my turn in our camping group to host the party/dinner. I then turn it off while we are cooking, browsing TV, playing cards, etc. to keep from tripping a breaker.

Once the party leaves, I turn the electric heating element back on. Works for my needs, but may not for anyone else's.
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Old 05-03-2013, 09:30 AM   #39
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Wow, that's efficient! Imagine a home water heater drawing 90 amps? (10X larger) Maybe time to locate a close by supplier of propane who delivers......
The electric hot water heaters have a dedicated 220 volt 50 amp ( or 60) breaker. The size is determined by hot fast it needs to heater the water, which is always slower than the usage rate. That's why long showers always eventually run you out of water home or rv. It just happens faster in the RV cause of the long tank.
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Old 05-03-2013, 11:14 AM   #40
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Very true. However on 30 amp rigs, using the electric heating element (9-13 amps average) can limit you on other things. You usually can never run the air-conditioner, microwave, and electric heating element at the same time.

It's all just a tradeoff, and everyone has to decide for themselves what they want to save in propane costs vs expending energy to turn other AC powered things off when using the heating element.

I think everyone here who is experienced with 30 amp rigs, already know what they can and cannot use at the same time...and thus have adjusted their camping lifestyles to fit.

I use the electric heating element until it's my turn in our camping group to host the party/dinner. I then turn it off while we are cooking, browsing TV, playing cards, etc. to keep from tripping a breaker.

Once the party leaves, I turn the electric heating element back on. Works for my needs, but may not for anyone else's.
I posted last week .

Electric heating element for water heater and a/c running on high blower was drawing 22 amps, I belive which will go higher obviously on a hot humid day.
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