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Old 12-16-2020, 12:49 PM   #1
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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
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Old 12-16-2020, 01:18 PM   #2
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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.
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Old 12-16-2020, 01:22 PM   #3
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Batteries are draining as the inverter isnít getting enough power to charge, less than 110 volts. However power coming into the coach is 120
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Old 12-16-2020, 01:37 PM   #4
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...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....
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Old 12-16-2020, 01:55 PM   #5
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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.
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Old 12-16-2020, 02:01 PM   #6
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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.
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Old 12-16-2020, 02:06 PM   #7
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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.

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Old 12-16-2020, 02:10 PM   #8
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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.
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Old 12-16-2020, 02:13 PM   #9
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first thought - loose connections. Turn the power off and tighten everything.
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Old 12-16-2020, 02:22 PM   #10
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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!
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Old 12-16-2020, 03:09 PM   #11
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Well, itís back to low voltage again 🤦🏻*♀️ Should have left it alone when He had the chance
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Old 12-16-2020, 03:13 PM   #12
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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?
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Old 12-16-2020, 03:16 PM   #13
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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.
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Old 12-16-2020, 04:04 PM   #14
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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.

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