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Old 01-18-2018, 07:24 PM   #1
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Keeping my tank heater on...

Temps in my area are going to be in the mid 20ís. Iím not connected to shore power so I ran an ext cord to my inverter, unplugged it from the socket in the compartment, and plugged it into the extension cord. I read that the tank heater will only turn on below 44 deg. This should work ok right?

If youíre connected to shore power the inverter would work the same way right?(pulling 120v from the socket in the compartment)
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Old 01-18-2018, 07:28 PM   #2
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30 ds btw...
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Old 01-18-2018, 07:33 PM   #3
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Temps in my area are going to be in the mid 20ís. Iím not connected to shore power so I ran an ext cord to my inverter, unplugged it from the socket in the compartment, and plugged it into the extension cord. I read that the tank heater will only turn on below 44 deg. This should work ok right?

If youíre connected to shore power the inverter would work the same way right?(pulling 120v from the socket in the compartment)


.... from where?? why would you not just 'run an extension cord' to your RV and plug your shore cord into it with an 30 to 15a adapter, found easily at most big box stores, hardware stores, etc?
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Old 01-18-2018, 11:47 PM   #4
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Tank heater is part of the 12v system. Why buy an adapter when you can just plug it directly into an ext cord?
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Old 01-18-2018, 11:49 PM   #5
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Iíll report if anything catches fire lol!
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Old 01-19-2018, 01:29 PM   #6
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I'm confused. An INverter steps up 12 volts to 120. If you need 12 volts the CONverter reduces 120 volts down to 12, but I've never seen one with a plug to connect an extension cord without an adapter. Just be sure you've connected the proper cords to power the heating pads.
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Old 01-19-2018, 01:31 PM   #7
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Do your tank heaters on your FR3 run off 120v AC?
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Old 01-19-2018, 01:33 PM   #8
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Tank heater is part of the 12v system. Why buy an adapter when you can just plug it directly into an ext cord?
You do realize an extension cord will be providing 120v AC NOT 12v DC ??????
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Old 01-19-2018, 02:23 PM   #9
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Its a 12v system. It usually pulls about 15adc based on my Magnum controller. Just plug in your extension cord to the 15/30 adapter that you can get from Lowes/HD to your RV plug. Leave your converter connected to that outlet so it can keep your batteries charged.
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Old 01-19-2018, 03:04 PM   #10
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I would not plug anything into anything until this gets sorted out. It is unclear what you are plugging into what.
Do you really have an inverter? ( not a converter)
If so what are you planning to plug into its 120VAC output?
Are you proposing plugging the TT shore cord into the inverter? If so Don't
If your tank heaters are 12V as many are, there should not be an inverter involved.
Please try to clarify this.


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Originally Posted by LytesOutFR3 View Post
Temps in my area are going to be in the mid 20ís. Iím not connected to shore power so I ran an ext cord to my inverter, unplugged it from the socket in the compartment, and plugged it into the extension cord. I read that the tank heater will only turn on below 44 deg. This should work ok right?

If youíre connected to shore power the inverter would work the same way right?(pulling 120v from the socket in the compartment)
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