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Old 10-15-2021, 09:17 PM   #1
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Charging/Inverter

Just got back from a trip and on our last day the generator stopped charging the coach.

I have no idea where to start.

Any help would be much appreciated.
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Old 10-15-2021, 09:29 PM   #2
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Break down the problem into bite sized chunks…

(What equipment is in your rig?)

Is the problem the generator or the inverter or something between them?

First question When running the generator do you have 120v to your rig? Does the microwave work?

Second question- when you plug into shore power
Does the charger work?
Does the microwave work?

Once you figure out what is working you can start to focus on what is broke.
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Old 10-16-2021, 06:27 AM   #3
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Check genny breaker,CBs on inverter,both legs of AC from genny at monitor panel, the breaker to inverter in CB panel. ATS connections fail and overheat in many MHs the contractors can as well. Any other breakers off in CB panel that could be mismarked.
Also most inverters won't charge batts if below 9v.
If hooked up remove battery temp probe from inverter to test they fail to high temp lowering charge voltage.
Battery disconnects often fail your description is limited.
Once in a great while inverter master reset fixes problems.
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Old 10-16-2021, 07:35 PM   #4
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Quote:
Originally Posted by Rocketman3 View Post
Break down the problem into bite sized chunks…

(What equipment is in your rig?)

Is the problem the generator or the inverter or something between them?

First question When running the generator do you have 120v to your rig? Does the microwave work?

Second question- when you plug into shore power
Does the charger work?
Does the microwave work?

Once you figure out what is working you can start to focus on what is broke.
I have a 2005 Holiday Rambler Navigator

If I'm running the invertor, not plugged into shore power, and only the generator then the Microwave will not turn on.

When I'm plugged in everything seems to charge and work.

I'm not sure what's not working, but I'm starting to think that since the breaker on the genny is not tripped, that it might be a corroded battery post?

Could that be the potential problem?
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Old 10-16-2021, 07:41 PM   #5
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Quote:
Originally Posted by 153stars View Post
Check genny breaker,CBs on inverter,both legs of AC from genny at monitor panel, the breaker to inverter in CB panel. ATS connections fail and overheat in many MHs the contractors can as well. Any other breakers off in CB panel that could be mismarked.
Also most inverters won't charge batts if below 9v.
If hooked up remove battery temp probe from inverter to test they fail to high temp lowering charge voltage.
Battery disconnects often fail your description is limited.
Once in a great while inverter master reset fixes problems.
I tried to an inverter master reset, as best as I understood the instructions, but the same issue.

I charged the system by being plugged into shore power and tried the generator just to see if the charge light would turn on, but it didn't.

I checked all the breakers that I could find and it didn't make a difference there either.

I'm assuming a corroded battery post, loose connection somewhere, or a breaker/fuse that I've not checked yet.
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Old 10-16-2021, 08:42 PM   #6
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I would look at the transfer switch.
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Old 10-17-2021, 06:36 AM   #7
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I would look at the transfer switch.
Thank you, I will look for it and check it out.
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Old 10-18-2021, 10:10 AM   #8
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Owners have found blown fuses in inverters . They pretty much say no serviceable parts but some just have a couple old style glass
fuses inside.
Mine had plastic car fuse soldered to board I made it remote to outside in case it blows again.
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Old 10-18-2021, 05:04 PM   #9
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Does the red charge light on the Trace Inverter remote come on when you are plugged into shore power?
But, it does not come on when your generator is running?
And your microwave will not run on the inverter?
And you've done an inverter master reset.

Did this just happen recently?

Sometimes shutting off ALL power as well as turning off the batteries will reset some of these strange issues. This requires unplugging from shore power, generator off, and turning off both master battery disconnects. Even then there may be some capacitors in the system as it takes a few minutes to drain everything.

I attached the Trace Inverter owners manual.
Hope this helps.
Attached Files
File Type: pdf Trace Inveter RV3012-GS_Owners_Manual.pdf (783.5 KB, 12 views)
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Old 10-18-2021, 06:07 PM   #10
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If things work on shore power and not generator power, it's not a battery problem.

The generator is a substitute for shore power. It does what shore power does, supplies power to the main circuit breaker box. It does not charge batteries or power the inverter any different then shore power does.

Shore power and generator power meet at the ATS. That's an automatic selector ( transfer ) switch.
One or the other powers the main panel.

If thing work on shore power but not generator power, you have a generator, ATS or wiring issue.
Start with generator breakers, then junction box near generator, where many bad connections are found, and then the ATS where burnt wire connections are often found.
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Old 10-19-2021, 12:13 PM   #11
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Twinboat is on it.

Transfer switches are know issues/failure items so starting there with a voltmeter is where you need to be.

Shoreline or Generator begin there and then on to the AC breaker panel.
Since shoreline works, the path from the shoreline is sound but either the generator is not putting out on one leg or there is a problem at the ATS.

The breakers on the generator often need to be cycled with the generator off.

You might lose more than one circuit if the ATS is not sending power on one leg but you might not pick up on it unless you were/are trying to run multiple air conditioners whereas they may be powered by a different leg of the generator.

A simple tightening the ATS connections is always a good maintenance item with all sources of power off of course.

With all of your symptoms combined I really think Twinboat has it nailed.
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Old 11-04-2021, 05:48 PM   #12
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Quote:
Originally Posted by twinboat View Post
If things work on shore power and not generator power, it's not a battery problem.

The generator is a substitute for shore power. It does what shore power does, supplies power to the main circuit breaker box. It does not charge batteries or power the inverter any different then shore power does.

Shore power and generator power meet at the ATS. That's an automatic selector ( transfer ) switch.
One or the other powers the main panel.

If thing work on shore power but not generator power, you have a generator, ATS or wiring issue.
Start with generator breakers, then junction box near generator, where many bad connections are found, and then the ATS where burnt wire connections are often found.
First of all, I want to thank all of you for helping me with this situation.

After chasing down wiring from one end of the motorhome to the other it finally showed itself in the negative ground Post on the inverter. This wire was just a little bit loose on the ground post and it somehow disconnected any charging..

I'm grateful that this was such a small fix but I'm grateful for the help I received that pointed me in the right direction.
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Old 11-07-2021, 08:28 AM   #13
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Quote:
Originally Posted by PG01 View Post
First of all, I want to thank all of you for helping me with this situation.

After chasing down wiring from one end of the motorhome to the other it finally showed itself in the negative ground Post on the inverter. This wire was just a little bit loose on the ground post and it somehow disconnected any charging..

I'm grateful that this was such a small fix but I'm grateful for the help I received that pointed me in the right direction.
Good Find!!
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Old 11-11-2021, 01:57 AM   #14
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Well Twinboat, can't argue with success but his repair sure does not add up to a loose terminal on the inverter. .

I suspect some other connection got exercised during the chase.
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