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11-28-2016, 08:59 AM
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#1
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Senior Member
Join Date: Sep 2014
Location: Poulsbo, WA
Posts: 749
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Water heater on or off at night?
We have a 10 gallon electric and LP water heater. Other than remembering to turn it on in the morning, is it best to turn it off at night or does it not really matter. Most of the time we are plugged in to 50amp power.
Thanks...
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Bill and Debb---2010 CT Coachworks Siena 35V
1999 Jeep Cherokee Sport---Roadmaster Falcon 5250 -
1 Cavalon (Scooby) 1 Papipoo (Bella- DOB 5/06/18)
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11-28-2016, 09:06 AM
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#2
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Senior Member
Workhorse Chassis Owner
Join Date: Apr 2009
Posts: 904
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If you're on 50 amp power, why turn it off at night? If you leave it on, you'll have hot water for anything you need it for when you get up in the morning.
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Jim & Shirley & Abbie (Scottish Terrier)
2013 Newmar Canyon Star 3911, 2005 Dodge Grand Caravan - Braun Accessibility Modified Toad, Remco Lube Pump, 5 Star Tune, Progressive Industries EMS-HW50C, Coach Net Emergency Road Service, FMCA 378968
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11-28-2016, 09:11 AM
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#3
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Senior Member
Join Date: Jun 2006
Location: Dallas,OR
Posts: 4,584
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I never turn mine off when in camp. Never have. Like having hot water when I want it.
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Don and Lorri
Resident Dummy. 
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11-28-2016, 09:18 AM
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#4
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Senior Member
Outdoors RV Owners Club
Join Date: Oct 2016
Posts: 1,804
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Quote:
Originally Posted by 450Donn
I never turn mine off when in camp. Never have. Like having hot water when I want it.
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I assume the water tanks are glass lined. If that is the case then the heat cold recycling will cause the water heater tank to fail sooner. If you think about it roadways are the same. So keeping the tanks at temp is better.
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2018 ORV 24KTS 30,000+miles
2017 Ford 3.5 TwinTurbo w/MaxTow
640 Watts solar/600 Ahr
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11-28-2016, 09:29 AM
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#5
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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I always left ours on when parked, even when on gas only. We had the three way unit gas/electric and motor aid.
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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11-28-2016, 01:15 PM
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#6
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Senior Member
Join Date: Jan 2009
Posts: 5,386
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Whether we're plugged in or having to use the propane, it stays on while camping.
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03 Itasca Sunova, Workhorse P32 with the 8.1 and 4L85-E
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11-28-2016, 01:23 PM
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#7
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,771
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We leave the AC side of the WH on all the time when we're on shore power, then turn on the LP side before getting showers in order to have more hot water.  
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Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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11-28-2016, 02:26 PM
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#8
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Senior Member
Join Date: Dec 2009
Location: Out there, somewhere
Posts: 9,941
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Quote:
Originally Posted by Wbonsell
We have a 10 gallon electric and LP water heater. Other than remembering to turn it on in the morning, is it best to turn it off at night or does it not really matter. Most of the time we are plugged in to 50amp power.
Thanks...
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Well Sir,
You don't say whether or not you're referring to the propane operation or, 120VAC operation of the water heater in your question. If you're referring to the propane side, many will turn it off to conserve propane as, the unit may cycle a few times during the night, especially if it's an exceptionally chilly night. If you're referring to the 120VAC side, there's really no need to turn it off. All you'd be doing is, saving the owner of the campground a minute amount of money in his electric bill and you'd be out hot water in the morning.
When we dry camp which of course means using the propane side of our water heater, we often shut the water heater down when we go to bed. But, being of "older age" and therefore the necessity of getting up at least once or twice before morning for a bathroom run, one of us will turn it back on in the wee hours of the morning. By the time we get up, it's cycled enough that we have our water hot for wash-up.
Scott
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2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '20 Honda NC750X DCT
 2018 Goldwing Tour DCT Airbag
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Heidi character, (mini Schnauzer)!
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11-28-2016, 02:34 PM
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#9
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Senior Member
Join Date: Jul 2010
Posts: 5,332
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Since we have gas only we turn it off after all use for the night. Back on in the morning. When I had a combo unit, left it on elec all the time.
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Tom
2016 Newmar Bay Star Sport 3004
2021 Jeep Gladiator Sport Willys
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11-28-2016, 02:52 PM
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#10
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Senior Member
Newmar Owners Club Freightliner Owners Club
Join Date: May 2012
Location: Today? Clayton, North Carolina
Posts: 5,093
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If you turn it off all night, and it's chilly, you'll waste time and energy in the morning reheating the same water. A water heater turns itself off and on anyway, to keep the water at the selected temp.
We use the same technique others have mentioned. We leave the electric on constantly, but turn on the gas before a large usage just to enhance recovery time.
John & Diane, fulltiming since '12 02 DS40, FL, Cat, '04 Element NHSO RVM103
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John and Diane (RIP Lincoln, 21 FEB 22) RVM103 NHSO
Fulltimers since June, 2012
2002 Dutch Star 40, Freightliner, Cat 3126, 2004 Element
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11-28-2016, 03:04 PM
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#11
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Senior Member
Monaco Owners Club
Join Date: Oct 2014
Location: Rigby, Idaho
Posts: 3,946
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Yeah, wifey gets up and there's no hot water, starts her day off with that. No a place where I wanna be. The HWH stays ON, sweety stays happy, I live another day.
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Cheers,
TonyMac
2006 Monaco Safari Cheetah 40PMT
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11-28-2016, 03:06 PM
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#12
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Senior Member
Join Date: Apr 2015
Posts: 331
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Quote:
Originally Posted by JFXG
If you turn it off all night, and it's chilly, you'll waste time and energy in the morning reheating the same water. A water heater turns itself off and on anyway, to keep the water at the selected temp.
We use the same technique others have mentioned. We leave the electric on constantly, but turn on the gas before a large usage just to enhance recovery time.
John & Diane, fulltiming since '12 02 DS40, FL, Cat, '04 Element NHSO RVM103
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You may be wasting time reheating, but you won't be wasting energy. Reheating only replaces the heat energy lost from the tank as it cools overnight. Overall, you will save energy by turning off the tank at night because heat loss from the tank is proportional to the tank temperature. As the tank cools at night, it will be losing heat at a lower and lower rate.
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2011 Itasca Meridian 34Y
2014 Honda CR-V
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11-28-2016, 03:11 PM
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#13
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Senior Member
Join Date: Apr 2016
Location: Virginia Beach
Posts: 195
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Water heater on previous and current motorhome both Atwood 6 gallon propane… Only turn it on when needed to save propane… But usually heats up pretty quick usually five or 10 minutes and will be scalding hot when ready...
So yes we turn ours off at night...
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- 2017 Coachmen Mirada 35LS - Class A Gasser
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11-28-2016, 03:29 PM
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#14
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Senior Member
Join Date: May 2006
Location: SoCal
Posts: 1,123
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Quote:
Originally Posted by bargeman
Water heater on previous and current motorhome both Atwood 6 gallon propane… Only turn it on when needed to save propane… But usually heats up pretty quick usually five or 10 minutes and will be scalding hot when ready...
So yes we turn ours off at night...
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