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Old 03-22-2014, 08:20 AM   #1
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Running Aqua Hot on house battteries

I dewinterized my MH for travel last month. Now home with a few cold nights in the forecast for next week, and I really don't want to rewinterize. Question: Can I run the Aqua Hot overnight using the house batteries? Should I use electric or diesel heating? Thanks.
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Old 03-22-2014, 08:50 AM   #2
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The AH always runs on house batteries. Using the electric element or the diesel burner depends on how cold it will be. If you have access to shore power, turn them both on. The electric element will work until it gets too cold, then the burner will take over automatically.
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Old 03-22-2014, 09:03 AM   #3
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I dewinterized my MH for travel last month. Now home with a few cold nights in the forecast for next week, and I really don't want to rewinterize. Question: Can I run the Aqua Hot overnight using the house batteries? Should I use electric or diesel heating? Thanks.
Since you are asking about electric, I assume you have shore power available. If so, just leave both electric and diesel switches turned on and you will be fine. The diesel burner only requires 12 VDC to run but if no shore power and your batteries start to get drained, a low voltage situation can damage the blower motor that runs the burner.
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Old 03-22-2014, 10:35 AM   #4
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The electric element is 110v and should not be connected to inverter circuit (I believe) so unless your on shore power you will need to turn on the diesel burner for the boiler. The pumps and fans all run on 12 volt so no problem there.
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Old 03-22-2014, 01:25 PM   #5
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The electric element is 110v and should not be connected to inverter circuit (I believe) so unless your on shore power you will need to turn on the diesel burner for the boiler. The pumps and fans all run on 12 volt so no problem there.
I wasn't sure if the electric was on the inverter. So do you think I can run the diesel burner all night on the batteries alone (no shore power)? Concerned about Steve's post concerning low voltage damage to the pump.
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Old 03-22-2014, 07:42 PM   #6
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Do you have Auto Generator Start (AGS)? If so, and you have no AC power, turn on the AGS. Then, when the batteries get discharged to a certain level, the AGS will start the generator, charge the batteries, then turn the generator off when charging is complete.
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Old 03-23-2014, 08:11 AM   #7
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If the only shore power available is 110/120 V, 20 amp, will the AH with the electric switch still work properly?
Thanks

(Sorry, don't mean to "rob" this thread, related topic)
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Old 03-23-2014, 08:24 AM   #8
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[QUOTE="smokin38;1979491"]If the only shore power available is 110/120 V, 20 amp, will the AH with the electric switch still work properly? Thanks (Sorry, don't mean to "rob" this thread, related topic)[/QUOTE

It depends on total electric demand. There are AH units with different electric elements. If you have one 120 VAC element, which most likely you do, then if you turn most everything else off, it will run ok. You will have to turn the battery charging portion of your inverter down to a lower setting and make sure any other resistance type loads are turned off.
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Old 03-23-2014, 11:48 AM   #9
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The OP asked if he can run the AH overnight on house batteries. The answer is yes, I do it frequently. On batteries you must use diesel - I'm not sure my AH electric is even connected to the inverter, bit if it was it would kill the batteries in a very short period. You will need good batteries with lots of charge if it is very cold as the AH will be on a lot and it has an internal blower and fuel pump in addition to the circulation pumps and fans.

Auto start on the gen set will solve the problem of battery charge level. Keep the temp setting low - 55 F will do.
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Old 03-23-2014, 03:01 PM   #10
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The OP asked if he can run the AH overnight on house batteries. The answer is yes, I do it frequently. On batteries you must use diesel - I'm not sure my AH electric is even connected to the inverter, bit if it was it would kill the batteries in a very short period. You will need good batteries with lots of charge if it is very cold as the AH will be on a lot and it has an internal blower and fuel pump in addition to the circulation pumps and fans.

Auto start on the gen set will solve the problem of battery charge level. Keep the temp setting low - 55 F will do.
Thanks to all who responded to this thread. One final question, At what voltage do you recommend I set the auto start to start the gen?
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Old 03-23-2014, 03:11 PM   #11
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I was told 11.8 volts is a good number, that takes you to about 35 percent state of charge. Still enough to start the generator. Set the run time to about three hours.
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Old 03-23-2014, 03:29 PM   #12
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Good answers--now-- Temp will be about 29 degrees--to heat the bay only; can you run the AH bay heat with just the electric on (connected to 50 amp) and NOT the diesel burner on Thanks
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Old 03-23-2014, 06:35 PM   #13
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Thanks to all who responded to this thread. One final question, At what voltage do you recommend I set the auto start to start the gen?
My AGS is automatic, it decides when to start. I'm sure it says what the voltage is, but it's buried somewhere in the manual to which I don't have access at this time.
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Old 03-23-2014, 06:43 PM   #14
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On the Magnum inv/chgr, the set up button allows you to set the parameters, as far as search watts, low batt. cut out, temp on, etc. All dictate function of AGS
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