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-   -   Power issues (https://www.irv2.com/forums/f104/power-issues-518307.html)

Irie 12-16-2020 12:49 PM

Power issues
 
Power at pedestal is good.
Power at distribution center is good.
Power at inverter says low voltage, keeps kicking inverter on, draining the batteries.

Hard reset straightened it out but lasted for maybe 2 minutes before it started all over again. Thoughts?

Thanks

Unplanned Tourist 12-16-2020 01:18 PM

Sounds like the batteries aren't getting charged up.

How's the battery voltage? It should stay around 13 +- 0.5 volts while plugged into shore power.

Irie 12-16-2020 01:22 PM

Batteries are draining as the inverter isnít getting enough power to charge, less than 110 volts. However power coming into the coach is 120

Old Scout 12-16-2020 01:37 PM

...Volts and amps are like quality and quantity of current….what amps is the circuit rated for at the "pedestal" eg 20, 30, 50? When "fixed for a few minutes", how many amps are being drawn? 120v as a surface charge with no amp load doesn't mean much....no simple answer for low voltage--start by checking all the connects in between, eg, dog-bones, extension cords, an internal connections in the coach, eg, cable reel, surge protector, transfer switch, breaker boxes, inverter, etc...
PSS--drop your "shared" shore power setting on the inverter down to 10 or 15 amps and see if volts are still dropping....

Irie 12-16-2020 01:55 PM

50 amps at pedestal
With charger and inverter off, itís bouncing between 88 and 95 volts incoming power. On one leg; the one that doesnít run thru the inverter is 118 volts (while running the dryer). Both read 118 on monitor outside.
Running off generator, no difference.

Inverter when on is working off the batteries. Voltage coming in is too low to use shore power.

Irie 12-16-2020 02:01 PM

I may need to clarify. Both legs are fine coming in to the coach. The one that goes thru the inverter is showing 88-95 volts (this morning it was 106 when this started, has decreased throughout the day). The leg that doesnít go thru the inverter is fine.

96Bounder1st 12-16-2020 02:06 PM

Transfer switch troubles?

As one side is getting, seeing low voltage sounds as if your transfer switch is starting to have troubles.

Turn of power and check connections.

Terry

Irie 12-16-2020 02:10 PM

Issue is the same whether on shore power or generator. Power on the panel is fine, 120 volts outbound to inverter. The problem is past there.

andy29847 12-16-2020 02:13 PM

first thought - loose connections. Turn the power off and tighten everything.

Irie 12-16-2020 02:22 PM

Been working on it since 8 am. Tightened everything multiple times. HOWEVER, just tightened neutral wires on distribution panel and it seems to be ok right now. Back up to 118 volts. Going to shut it back off and redo the connections. Iíll keep you advised.

Whenever weíre stumped I post on here and it usually gets solved. You guys are great!

Irie 12-16-2020 03:09 PM

Well, itís back to low voltage again 🤦🏻*♀️ Should have left it alone when He had the chance

Old Scout 12-16-2020 03:13 PM

Interesting--the shore power circuit thru the inverter/charger is just a pass-thru, so inverter/charger is passing low volts and wont charge the bats???...so with inverter off, what is the voltage on the input lugs on the inverter? then turn on inverter and check both input and output, turn on charger and recheck.
PS--what is make and model of your inverter/charger?

twinboat 12-16-2020 03:16 PM

Inverter transfer switch wires tight ? They are on the Inverter under a cover.

Auto Transfer Switch wires tight ? Near junction of shore and generator input.

If equipped, cord real contacts burnt ? Move cord and monitor voltage.

Irie 12-16-2020 04:04 PM

We have 120V at the inverter input, nothing out the output. It does have 120 intermitently, but immediately shuts off. Sort of clicks on then off over & over.
Has full voltage when inverting.

Original SR2000

Old Scout 12-16-2020 05:21 PM

….kind of a crude test---try physically unhook the inverter in and out hot 120v wires [grounds should be bussed]…. and connect them together.....then put a load on the output circuit, eg, microwave????.....this will tell you for sure whether its the inverter by pass circuit or something else, like the ATS--but it now sounds like the inverter by-pass circuit is bad....

Irie 12-16-2020 06:46 PM

I’ll try that.
Thanks very much!

Irie 12-17-2020 08:09 AM

Yep. You nailed it. Bypassed the inverter and have microwave, fridge and TV running. So, I guess itís time for a new inverter...

Old Scout 12-17-2020 10:42 AM

Yup--not sure there is anything repairable inside the RS2000...I have heard there is an internal fuse but that would cause a dead circuit, not low voltage....RS2000 was never my favorite--replacing it is not an entirely bad thing....love it when a plan comes to a happy ending....safe travels

Irie 12-17-2020 02:09 PM

Thanks again for the help!

cavie 12-17-2020 02:28 PM

Quote:

Originally Posted by Irie (Post 5560475)
I may need to clarify. Both legs are fine coming in to the coach. The one that goes thru the inverter is showing 88-95 volts (this morning it was 106 when this started, has decreased throughout the day). The leg that doesn’t go thru the inverter is fine.

Where does it change to 88 volts? where is it good?

Irie 12-18-2020 07:22 AM

Voltage is good to the inverter, one leg is low after the inverter.

paul65k 12-18-2020 07:54 AM

Quote:

Originally Posted by Irie (Post 5562529)
Voltage is good to the inverter, one leg is low after the inverter.

On the surface it sure sounds like the issue may be at or in the inverter. Did you try bypassing the inverter for testing to see if you are still getting low voltage when the in/out lines are just combined and then checked to verify that there is not a downline wiring issue?

Other than that being the issue, there is something obviously going on in the inverter I would guess.

Old Scout 12-18-2020 01:09 PM

...technically, you only have one of the two 120v "legs" going to the inverter and even then, not all of that leg goes thru the inverter, eg, the two roof-top A/Cs are on two different 120v legs, but neither leg goes thru the inverter....if the wiring disconnect I suggested solved the issue--then I am pretty sure your inverter is the issue....

paul65k 12-18-2020 02:19 PM

Quote:

Originally Posted by Old Scout (Post 5562959)
...technically, you only have one of the two 120v "legs" going to the inverter and even then, not all of that leg goes thru the inverter, eg, the two roof-top A/Cs are on two different 120v legs, but neither leg goes thru the inverter....if the wiring disconnect I suggested solved the issue--then I am pretty sure your inverter is the issue....

You said that so much better than I did:thumb:

bcbowers 12-20-2020 10:17 AM

Ok, my inverter (both old & new Xantrex) has 2 - 120V AC lines but that represents 1 - leg of the 240V 50amp source. One line is the IN and the other line is the OUT that is used to charge the batteries or feed the Inverter AC panel when inverting DC to AC. The other ďLEGĒ of the 240V source goes directly to the A/C units and various outlets. Atleast thatís the way my coach works and the reason why the Inverter canít run the A/C units.

The previous discussion about 2 - legs in the inverter was confusing. Just saying.

twinboat 12-20-2020 11:35 AM

Quote:

Originally Posted by bcbowers (Post 5565192)
Ok, my inverter (both old & new Xantrex) has 2 - 120V AC lines but that represents 1 - leg of the 240V 50amp source. One line is the IN and the other line is the OUT that is used to charge the batteries or feed the Inverter AC panel when inverting DC to AC. The other ďLEGĒ of the 240V source goes directly to the A/C units and various outlets. Atleast thatís the way my coach works and the reason why the Inverter canít run the A/C units.

The previous discussion about 2 - legs in the inverter was confusing. Just saying.

Actually, both legs go to the double 50 amp main breaker. From there a 30 amp breaker feeds the inverter/charger. Then back to the panel for some of the breakers.

Nothing goes directly to ACs and outlets, they will have branch breakers from the main double 50 amp.

Old Scout 12-20-2020 08:20 PM

….you say potato; I say potato--its still a vegetable....think the OP has it figured out now...

akeagle 12-20-2020 08:35 PM

Quote:

Originally Posted by Irie (Post 5560491)
Been working on it since 8 am. Tightened everything multiple times. HOWEVER, just tightened neutral wires on distribution panel and it seems to be ok right now. Back up to 118 volts. Going to shut it back off and redo the connections. Iíll keep you advised.

Whenever weíre stumped I post on here and it usually gets solved. You guys are great!

Check for dirty or corroded connections?

cavie 12-21-2020 02:06 AM

Quote:

Originally Posted by Old Scout (Post 5565943)
Ö.you say potato; I say potato--its still a vegetable....think the OP has it figured out now...

I don't believe he does and he needs to learn the proper language anyway.:nonono:

Cinequip 12-21-2020 03:26 PM

One of my Alpine friends just had the exact same thing occur. Tightened all the lugs to no avail, and finally bypassed the 120v around the inverter. Problem solved. New Inverter time.

Irie 12-22-2020 07:10 AM

Yes we have it figured out and yes itís the inverter. Waiting on a new one now. We will install it ourselves, as hubby has done countless installs on boats. Sorry if my ďlanguageĒ isnít correct, but I still got the point across.

Thanks to everyone who helped, especially Old Scout 😎

Irie 01-13-2021 12:28 PM

Finally received the new inverter (long story) and just finished installation. All is now right with the world, lol

Thanks everyone for all the help.


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