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Old 04-17-2016, 06:55 AM   #1
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Inverter question

Does the inverter need to be left on when connected to shore power or only when driving down the road.

Also we hit the battery disconnect switch when we dropped it off in storage two weeks ago. Why did our leveling system and inverter tell us low voltage / power when we went to hook back up? Shouldn't the batteries held a charge for two weeks? Our storage place has no electric hook up.


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Old 04-17-2016, 07:24 AM   #2
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The main function of an inverter is to supply 120v AC from you batteries. When hooked to shore power 120v AC there is no need for the inverter. One caveat I assume your inverter runs your whole coach I have heard of installations that the inverter only runs one or two specific outlets.

As for your batteries going dead, NO they should not lose their charge in just two weeks. You said you used the battery disconnect switch, my question does it truly disconnect every last electrical device in your coach? Quickest way to test is to disconnect a battery cable with the switch off use an amp meter inline to check for any current draw, if there is you have some accessory draw not going through that switch. If there is no current draw you may have a bad battery, kinda doubtful as you have a fairly new coach but they do fail??
Check for the current draw that will confirm and give you peace of mind whenever you put your coach in storage it will be ready for next time.
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Old 04-17-2016, 08:38 AM   #3
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Stupid question but how do we check for draw with the battery disconnect off?


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Old 04-17-2016, 09:54 AM   #4
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An inverter draws some power even if not being used.
Use an ampmeter in line between the battery post and the cable.
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Old 04-17-2016, 06:45 PM   #5
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here is a 3 minute basics, only difference is you'll be at the battery and removing a battery cable instead of at the light as he is showing,



17 minutes long but educational

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Old 04-17-2016, 06:47 PM   #6
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sorry pasted wrong link

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Old 04-17-2016, 07:49 PM   #7
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You haven't said, but I would guess that you have a residential fridge in your new Cedar Creek. Not knowing how your inverter is wired makes it hard to answer. We have a residential fridge with a dedicated inverter in ours and I never shut it off until we are home and the fridge is shut off. I have an automatic transfer switch that automatically changes from inverter to shore power and vice versa. I leave it on because if we have a power outage at the park the fridge will keep running.

Sounds like you have something still running with battery switch off, like maybe the propane leak detector or carbon monoxide alarm. You may have to do a disconnect at the battery(ies).
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Old 04-17-2016, 09:29 PM   #8
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kwayRN,
Does your Cedar Creek have a residential fridge or an RV fridge?
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Old 04-18-2016, 07:13 AM   #9
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The battery disconnect on our 16 Cougar does not turn everything off. Its too new for me yet, but the jacks and slides still work with the disconnect off. I'm sure there are other things left on...
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Old 04-19-2016, 09:35 PM   #10
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Quote:
Originally Posted by wingnut60 View Post
An inverter draws some power even if not being used.
Use an ampmeter in line between the battery post and the cable.
When you say "not being used" do you mean "turned on but idle" or do you mean "turned off"?
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Old 04-19-2016, 09:58 PM   #11
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Need to get this out in the open--I am not an electrical expert, or even close...

It is my understanding that inverters have a capacitor in them that needs to be charged from the batteries--to keep that up requires some draw from the batteries most of the time. Just 'turning it off' does not stop that draw, if I understand this correctly, it need to have one of the leads disconnected. Again, not knowledgeable about these, but the few inverters I have used with leads always spark when connecting the leads, even when off. Different brands, higher-end models, may not have this draw.
When in doubt, read the manual........
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