Victron sine wave problem while charging (2024)

  • Jun 23, 2024
  • #1

Sababa

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I recently had both a new Victron Quattro inverter charger and a new Splendide washer/dryer installed on my boat. The other day when I went to do a load of laundry for the first time while running the generator, the washer wouldn’t start. I called Spendide’s (excellent) technical support, and they determined that that the washer was going into pause mode because there was a problem with the sine wave in the power supply. They had me turn off charging from the Victron, and lo and behold, the washer fired right up. So I can do laundry or charge on the hook, but not both. Any idea why this might be? Shouldn’t the inverter just be passing through the generator power when it is not inverting? Why would charging make a difference to the sine wave being provided to the washer, which is not even on an inverted circuit?

  • Jun 23, 2024
  • #2

D

DDW

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The washer is running directly from the generator, or through the Victron pass-through relay? What is the amp limit set to on the Victron?

Many small gensets have a very poor sine wave shape which gets worse when more heavily loaded. You can only see it on an oscilloscope, but perhaps the Spendide is objecting to that.

  • Jun 23, 2024
  • #3

R

rslifkin

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The inverter should be just passing power through. It's more likely that the issue is with the power your generator is putting out while under a heavier load. I'd bet that if you stopped charging, but turned on some other big loads, you might see the same issue with the washer/dryer.

  • Jun 23, 2024
  • #4

SteveK

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I would like to know as well.
You were asked to turn off the charger but still ran the GEN which powered the washer, correct. Like you said the inverter/charger should pass through when inverting, which should be the same after the charger is off as it was before. Does not make sense.

One thought, any chance the washer polarity is opposite to the input at Inverter/charger. The hot and neutral reversed.

  • Jun 23, 2024
  • #5

tiltrider1

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When you are on shore power, set up the same charging and washing scenario. See if you have the same issue. This will help you to determine if it is the generator or the Victron.

StevenK brings up a very often missed issue with reverse polarity.

  • Jun 23, 2024
  • #6

Jeff F

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rslifkin said:

The inverter should be just passing power through. It's more likely that the issue is with the power your generator is putting out while under a heavier load. I'd bet that if you stopped charging, but turned on some other big loads, you might see the same issue with the washer/dryer.

Agreed.

I recently had some generator issues. They were fuel related in my case. When loaded up the generator would sometimes start to fluctuate slightly in speed and the voltage would start to get wobbly.

The interesting part for me was watching the inverter handle the pass through from the generator. It would tolerate voltage fluctuations down to about 100v before shutting off the generator power source.

If you have a smaller generator it's possible that it's being overloaded as DDW suggests. You can set a maximum amperage input on the inverter/charger to easily manage this.

  • Jun 23, 2024
  • #7

SteveK

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Twice now the size of the generator has been suggested as the problem, please OP what is the generator size and make.

  • Jun 23, 2024
  • #9

tiltrider1

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Could actually be under loaded. Try again with more of load just to rule out the possibility of an under loaded generator fluctuating.

  • Jun 23, 2024
  • #10

R

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I doubt it's overloading, it may just be that with certain loads or certain amounts of load the output isn't clean enough if the splendide is picky. Or the governor could be out of adjustment allowing too much frequency droop as you add load.

  • Jun 23, 2024
  • #11

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I had a similar problem with a Splendinde. In my case I could be on either generator or shore power, and if the Mastervolt inverter was turned on the Spledinde wouldn’t work. Oddly, if I ran the splendide off the inverter with no shore or gen, it worked fine. My conclusion was that the splendine was very particular about the power waveform, and the charger load from the Mastervolt was enough distortion to mess up the washer. I have run into a variety of appliances over the years with similar incompatibilities.

Everyone will point the finger at the other products, and do so with zero actual information or diagnosis, and assure you that their product is working correctly. The reality I think it that they are overly sensitive to the power waveform which is pretty pathetic considering they target marine and rv markets where inverters and generators are prevalent.

  • Jun 23, 2024
  • #12

Flatswing

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I’m not familiar with your exact inverter but I understand that many of the newer models monitor the “pass through” voltage from dock or generator and boost if needed. Perhaps the generator speed is a bit off and the inverter contribution triggers the Splendide shut down? Just a WAG.

  • Jun 23, 2024
  • #13

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I was at anchor GEN running doing a load, hot water, charging and cooking. Have run washer off shore power pass through inverter In each case the power passes through the inverter and just inverter.

What about the washer neutral wire location, inverter buss bar? Does the washer run with just the inverter?

  • Jun 23, 2024
  • #14

Barking Sands

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A few things I can think of that may have an effect. Make sure weak AC is disabled and also try "accept wide frequency range" settings. Easy to check and try.

  • Jun 23, 2024
  • #15

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So the washer works fine with the generator loaded up with other draws or totally unloaded. It’s specifically having the charger connected that causes the problem. Also doesn’t seem to matter if it is bulk or absorb. Will try again when the batteries are fully charged and the charger is on float to see if that makes a difference. I don’t see how charging or not charging could affect polarity and I don’t have equipment on board to look at the wave form.

  • Jun 23, 2024
  • #16

OP

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Barking Sands said:

A few things I can think of that may have an effect. Make sure weak AC is disabled and also try "accept wide frequency range" settings. Easy to check and try.

What are these settings?

  • Jun 23, 2024
  • #17

Barking Sands

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Sababa said:

What are these settings?

Here is a good rundown of the settings. Although Weak AC typically stifles charge capacity it may or may not have an affect on pass through. Same with accept wide frequency range, usually this is when the Quatto/MP will not accept AC power. But it may be enough under the conditions you say to have a momentary issue? Not really sure. But if you read the forums enough...occasionally finicky issues are solved with these settings, especially off gen power.. There are other settings on this list you might check as well. How to Program a Victron Multiplus/Quattro

  • Jun 23, 2024
  • #18

OP

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So the problem is specific to a single outlet. Washer works fine off the nearby non-inverted water heater outlet with the genset running and charging, and also off an inverted outlet in the next cabin through an extension cord. I’m guessing it has to be something to do with the wiring in the panel—maybe some sort of cross talk between the washer and the charger breaker? Has anyone heard of such a thing? Other ideas?

  • Monday at 6:52 AM
  • #19

ranger58sb

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Sababa said:

So the problem is specific to a single outlet. Washer works fine off the nearby non-inverted water heater outlet with the genset running and charging, and also off an inverted outlet in the next cabin through an extension cord. I’m guessing it has to be something to do with the wiring in the panel—

Or an outlet that's going south?

-Chris

  • Monday at 8:27 AM
  • #20

B

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Inverters can really dirty up the power line they’re hooked up to. Especially the ones that sync up with the incoming power so they can take over in a couple milliseconds.
The splendide must be inverter driven too? Some power line filtering might help if it turns out there’s nothing wrong with the outlet circuit.

  • Monday at 11:51 AM
  • #21

tiltrider1

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Sababa said:

So the problem is specific to a single outlet. Washer works fine off the nearby non-inverted water heater outlet with the genset running and charging, and also off an inverted outlet in the next cabin through an extension cord. I’m guessing it has to be something to do with the wiring in the panel—maybe some sort of cross talk between the washer and the charger breaker? Has anyone heard of such a thing? Other ideas?

Interesting. To really get to the bottom of this you will need to see how the inverter/charger and this circuit are related. Possibly they share the circuit. More likely the circuit wires are zip tied to each other some where that is causing the interference.

  • Monday at 11:56 AM
  • #22

OP

OP

Sababa

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ranger58sb said:

Or an outlet that's going south?

-Chris

Except if it was the outlet, why would having the charger on make a difference?

  • Monday at 11:59 AM
  • #23

tiltrider1

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Sababa said:

Except if it was the outlet, why would having the charger on make a difference?

Is this outlet on the same circuit as the outlet that has no issue?

  • Monday at 12:49 PM
  • #24

OP

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Sababa

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tiltrider1 said:

Interesting. To really get to the bottom of this you will need to see how the inverter/charger and this circuit are related. Possibly they share the circuit. More likely the circuit wires are zip tied to each other some where that is causing the interference.

I like this theory and will check it out when I have some time without guests aboard to open up the panel. In the meantime, I’ve just got them both plugged in to the water heater outlet for now.

  • Monday at 12:50 PM
  • #25

OP

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Sababa

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tiltrider1 said:

Is this outlet on the same circuit as the outlet that has no issue?

Nope, different circuits.

  • Monday at 2:09 PM
  • #26

tiltrider1

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Sababa said:

Nope, different circuits.

That narrows the scope of the problem. If there is a different outlet on the same circuit as the problem outlet, give it a try. This will help zero in on the problem area.

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Victron sine wave problem while charging (2024)

FAQs

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Disconnect the battery from the inverter

Disconnect the battery, wait a half hour, and then reconnect, this will reboot the inverter's processor and clear any possible error states.

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Inverter frequency60 Hz
Absorption voltage14.4 / 28.8 / 57.6V
Absorption timeup to 8 hours (depending on bulk time)
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Check if the input voltage exceeds the limits of the inverter charger. If so, replace the battery with a battery with the correct voltage for the inverter. Check if the wiring to the inverter input or output is reversed or short-circuited. If it is, correct the wiring per the instruction manual.

How do I manually reset my inverter? ›

Switch off the main breaker for AC power and DC disconnect if applicable. Allow the inverter to discharge and reset for a few minutes. Reset the breakers or switches to restore AC/DC power. Follow the manufacturer's instructions to turn it on.

How do I reset my Victron battery charger? ›

5.4. System reset
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After the inverter has switched off due to high DC ripple voltage, it waits 30 seconds and then restarts. After three restarts followed by a shutdown due to high DC ripple within 30 seconds of restarting, the inverter will shutdown and stops retrying. To restart the inverter, switch it Off and then On.

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Sometimes, you might notice that the inverter main is on but it's not charging. Even after you leave it to charge for a significant amount of time as well. This could be because of loose connections or no connections of the battery to the charging inverter.

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If you have an oscilloscope, you can see the waveform. If you don't have an oscilloscope, you listen to the sound of a ceiling fan running on the inverter. If its sound is same as that running on normal mains supply, yours is a sine wave inverter. If the sound has extra hum, it is a square wave inverter.

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What does pure sine wave mean on an inverter? ›

A pure sine wave inverter is an electronic device that converts direct current (DC) to alternating current (AC). A sine wave is a continuous wave that describes a smooth repetitive oscillation. Conventional AC power is produced by rotating machines and is mathematically described as a sine wave.

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The state of charge is the best way to monitor the battery. A fully charged battery will be indicated by a value of 100.0%. A fully discharged battery will be indicated by a value of 0.0%.

How long does a Victron battery last? ›

Product Specification
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Step 9: Turn on your inverter

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Why does my pure sine wave inverter keep beeping? ›

If your battery's capacity is getting depleted, your inverter is likely to make noise or start beeping. To reduce this noise, consider charging your battery first and then powering on your inverter thereafter.

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