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Old 06-19-2006, 11:29 PM   #1
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Default Reverse Polarity - Pursuit 3070 & EU2000i Generator

Daddies day and I'm out with the familiy, friends, and kids tiedup with a buddy's boat. Promised the admiral and the other moms that my new generator would power the blender for some ritas.To avert a mutiny I had to plug it directely into the generator when my 3070's reversepolarity light went onand heard periodicwarning beeps. 2005 Pursuit if that makes a wiring difference.

Had my hands full fending offthe lovely but fierce mutineers, so had no time to figure out what went wrong.Plugged my shore power line with adapter pluginto the generator after first plugging into theboat and hadthat outcome.

I assume it was a bonehead screw up on my part. Bonehead question -what happened? Inverter? Do I need some sort of adapter in between the Honda and the 3070? Shouldthe batteries & DC have beenturned on or off or doesthat matter? Grateful for any help.

thanks all.

Subrosa
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Old 06-20-2006, 09:38 AM   #2
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Default Re: Reverse Polarity - Pursuit 3070 & EU2000i Generator

I've only had th reverse polarity light come on once. The dealership ran me an extension cord that was only a 2-prong. That 2-prong cord was plugged into the 30A conversion cord, which was in turn plugged into the 110 shorepower plug. Switching out the 2-prong cord for a 3-prong fixed that problem.

Maybe skip the shorepower cord next time and run a 3-prong cord from your genny to the adapter plug??? It doesn't make much sense but might be worth a try on the trailer before your next trip.
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Old 06-20-2006, 05:03 PM   #3
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Default Re: Reverse Polarity - Pursuit 3070 & EU2000i Generator

Do a search here on this. this is a recurring issue with the Honda inverters. As I remember it isn't really a problem and can be ignored. Has to do with the wiring in the inverter as I remember.
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Old 06-20-2006, 05:41 PM   #4
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Default Re: Reverse Polarity - Pursuit 3070 & EU2000i Generator

As an electric motor operates, it creates an induced voltage that opposes the voltage that is turning it. Your blender may be periodically producing an induced voltage that is higher than the voltage of the generator. It will momentarily feed power back to the generator and cause the reverse polarity alarm to go off. If the alarm was going on and off, I'd be willing to bet it was off while the blender was under load and on while spinning free. The faster the motor spins, the greater the induced voltage.
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Old 06-20-2006, 10:01 PM   #5
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Default Re: Reverse Polarity - Pursuit 3070 & EU2000i Generator

Thanks for the hints guys and will check them out. It would be great if anyone else has a suggestion on this.

76GMC1500 - to clarify, I plugged the blender directly into the generator (which worked fine) only after the reverse polarity light came on when I plugged the boat's shore power cord into the generator.

Many thanks.
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Old 06-20-2006, 11:46 PM   #6
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Default Re: Reverse Polarity - Pursuit 3070 & EU2000i Generator

Ok, one or both of two things is happening. The generator is out of phase with the shore power or the generator voltage is lower than that of the shore power. Generators don't run well out of phase, I'm going to guess that your voltage is too low. If you have an adjustable voltage regulator, increase the voltage to match that of the shore power.
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Old 06-21-2006, 12:26 AM   #7
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Default Re: Reverse Polarity - Pursuit 3070 & EU2000i Generator

Ok Sub been around this issue last year. It is not a Pursuit issue but rather a ProMariner issue, (It is the Prosafe 1 monitor). Anyhow when they switched to that brand even the factory had power that would set it off. Damn unit does not even like GFI outlets. Ours we just reset by holding some buttons for a few seconds. I called the company that makes the product and they went on and on about the dangers of portable gens in boating applications. We have an inverter setup now that is much better for us and will only bring the Honda when we go on long trips where we won't see a dock for more than 3-4 days. Then we will use the gen to replenish the inverter batteries. Hope this helps but it is just not sensing ground and I don't think there is a portable gen on the market that would meet the specs required to not trigger the alarm.
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Old 06-21-2006, 11:33 PM   #8
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Default Re: Reverse Polarity - Pursuit 3070 & EU2000i Generator

PSW - thanks very much. You were a great help too on a couple of my 3070 threads earlier this year -- I did buy that left-over 2005 3070 Offshore and man do I love that boat! Doing great with the F225's (won't "miss" the F250's until I ride on someone's boat that has them!) so I can imagine what your 225's add to your package. I'll have to go back to those or other's threads where I think you described where you put the inverter. Did you add a fourth battery or are you drawing on the house battery?

Another hint on my situation - the greenish lights were blinking on the small panel above the large black AC/DC panel and the warning beeps came from the smaller panel. It wasn't the red reverse polarity light on the AC portion of the black panel. I'll check the 3070's manual tonight or boat this weekend to see if the ProSafe is the large or small panel. Called one of the great guys at Wise today (indeed great service and arrived two days after I ordered) and he's gotten a lot of calls on this and indicated it was not an actual threat to the system. I need more to go on than that. Will see what Pursuit suggests too.

BTW, when you reset by holding down "some buttons" did you then think all was fine or did you think you might be still be in a suboptimal situation with some risk of damage to your electrical system? Your comment caught my eye on what ProMariner told you about the risk of portable gens? Sounds overblown by them but, then again, what would they gain be dissing a product they don't even compete with? Perhaps the incompatibilty hurts their sales? Risk of generator surge damage to the boat's system? Trip the circuit breakers too often? Risk of underpowering electrical equipment? General concern over CO from generators? What's your hunch?

Thanks again everyone.

Sub

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Old 06-22-2006, 02:15 AM   #9
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Default RE: Reverse Polarity - Pursuit 3070 & EU2000i Generator

I think you are fine to use the generator. The unit is just picky. The problem is the "small box" and if you read the Pursuit info on the unit it will tell you what buttos to hold down to clear the beeping noise but the lights will remain on. I think you are fine. The older units Pursuit used in 1999 handled the same Honda's without a problem. The inverter is the trick longterm in my opinion for most items.

With the inverter we are not using the Pursuit batteries at all. Completely seperate. We added 2 AGM golf cart batteries and one 2800 watt inverter. Tied it to the boat for shore power charging only. Comes with a nice lcd for the cabin that has all the info we need and ties it to the Pursuit's Black box. All in all it is a pretty sweet setup for small items like Microwaves and blenders and TV's. The hotwater tank uses quite a bit and we all know that AC would drain it real quick. Sure is quiet though. . Like I said we will still use the Honda without hesitation when needed on long trips to recharge things.

Good Luck.
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Old 06-22-2006, 05:51 AM   #10
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Default Re: Reverse Polarity - Pursuit 3070 & EU2000i Generator

PSW - I read the ProSafe manual after signing off last night and saw that. Many thanks again for the feedback. However, my read indicates that it's trying to find a ground and can't.

Does anyone know how to establish a ground for generator on a fiberglass boat?? Has anyone done that or decided it didn't matter at all?
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Old 06-23-2006, 01:47 AM   #11
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Default Re: Reverse Polarity - Pursuit 3070 & EU2000i Generator

That is the problem with the little gen's they don't have the ground. We have tried to work around the ground problem also with not much success. Nobody makes a small grounded gen.
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