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Old 06-22-2010, 01:13 PM   #1
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Couple of electrical questions

Installed TV only works if the power converter is on -- even when I'm plugged into shore power. Even if I have the battery cut-off switch to 'off', the TV only works if the dc to ac inverter is turned on. Everything else seems to work without the dc to ac converter on (when the rig is plugged in). Anyone know why they would have wired it that way?

Also -- should I be shutting off the power inverter when the rig is stored?


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Old 06-22-2010, 08:50 PM   #2
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Posts: 318
Is the TV an A/C only unit?
Maybe that have wired it this way so you can use it in any situation?
It is bizarre though.
All I can think of is that the TV is A/C only so it gets it's A/C through the inverter reguardless of the trailers power situation.
If you figure it out, please post your findings.
I got a big curious now.


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Old 06-22-2010, 09:03 PM   #3
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Inverters can be bought that have a transfer switch in them. I don't know what type or brand yours is however so it is hard to tell if you have one or not. In such an inverter it has an input for AC and when your rig is plugged into shore power it would sense this and allow the AC to just pass through it and feed the circuit. If you aren't plugged into shore power and you have your inverter turned on then it will supply power to that circuit.

When in storage you should turn off the inverter. Inverters do draw a small amount of current when turned on but not being used. The amount seems to be related to how much money you spent for it. Good inverters draw very little but they do still draw. Also the better the inverter the more efficient they are at converting DC to AC. I think the best have an efficiency of around 90% and will drop to around 81% at full load. A very good reason why no one should be using them to power microwaves. They are horribly inefficient to use for such things.
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Old 06-23-2010, 04:45 PM   #4
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TV is AC only. NW Jeeper's got it right -- the circuit is a pass-through while on shore power and then off the battery if disconnected. Took me about an hour looking at the one-lines to figure that out

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