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Open Roads Forum  >  Class C Motorhomes

 > inverter problem?

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calif

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Posted: 02/22/12 10:55pm Link  |  Print  |  Notify Moderator

I have my rig plugged into ac power, but the lights are dim, and the pump barely works. when I turn on the rv (engine) the lights get brighter and all items that run on DC work fine. Is it my inverter?

Executive

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Posted: 02/23/12 01:12am Link  |  Print  |  Notify Moderator

No, it's your batteries...that's my guess and I'm sticking to it.....Dennis


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Pokey2

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Posted: 02/23/12 02:58am Link  |  Print  |  Notify Moderator

I tend to agree with Executive. However, if it’s not your batteries, I’d say it’s your converter. I don’t see how your inverter would come into the picture for lights, pump and other DC loads.

Mandalay Parr

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Posted: 02/23/12 05:40am Link  |  Print  |  Notify Moderator

Your Converter is not working properly. Could be a circuit breaker or a fuse.


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mgirardo

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Posted: 02/23/12 05:54am Link  |  Print  |  Notify Moderator

Sounds like your house battery is not being charged by the converter. When you run the engine, it charges the house battery. Like Jerry said, check the fuse or circuit breaker for the converter.

An inverter is used to invert 12v DC to 115 AC and has nothing to do with charging the batteries.

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ron.dittmer

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Posted: 02/23/12 11:17am Link  |  Print  |  Notify Moderator

If your charging circuit proves to be fine, check your batteries independantly of eachother. If only one is bad, take it off-line and use only the good one until you can replace both. Batteries should be replaced with identical brand, type, size, and manufacture date. If you go cheap replacing just the bad battery, you will quickly be right back where you are today.


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Bordercollie

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Posted: 02/23/12 11:22am Link  |  Print  |  Notify Moderator

Make sure that the cables running from your converter to the house battery are connected and secure at the converter's connector block. There may be a set screw connector on the converter that needs tightening. Check converter charging cable connections at the house battery and any reset buttons or fuses. Your house battery should read over 12 volts maybe 13.6 volts, on a voltmeter, when you are plugged in to shore power and your converter is charging the house battery. Is your house battery disconnect switch in the "on" position and working properly?

Your inverter is powered by the house battery, it converts 12 volts DC to 110 volt AC, usually to power low wattage 110 volt AC items like DVD players and small flat screen TV's. If your house battery is weak/discharged, the inverter may not work.

* This post was edited 02/23/12 11:31am by Bordercollie *

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calif

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Posted: 02/23/12 02:04pm Link  |  Print  |  Notify Moderator

When I plugged in I have ac power (tv ac) but the power panel is showing that the battery is low on juice. I have them on a charger right now, but I will pick up a meter after work.
So let me understand this, when the rv is plugged in, it is charging the house batteries. what i'm trying to understand is does the ac power go to the converter and then to the batteries and then to the dc powered equipment?
thanks for all the help so far

tenbear

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Posted: 02/23/12 02:43pm Link  |  Print  |  Notify Moderator

The AC power goes to the converter which then powers the 12 volt equipment and charges the batteries. You may have a battery disconnect switch which would remove the battery from the system, or part of it. There are many different converters, I think some converters may have a battery charging circuit separate from the other 12v circuits.


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ron.dittmer

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Posted: 02/23/12 02:47pm Link  |  Print  |  Notify Moderator

SUPER-HAWK wrote:

.... when the rv is plugged in, it is charging the house batteries. what i'm trying to understand is does the ac power go to the converter and then to the batteries and then to the dc powered equipment?
That would depend on your RV manufacture. It could be either way, or even a 3rd or 4th way. Some rigs are equiped with a power transfer switch, though usually used between shore power and the generator.

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