Outback Power AC voltage fluctuation [RE-wrenches]

[Jeff Wongstrom]

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Hello Jay,

I came across the same issue about a year ago.  The Fluke 87 measured  
several volts lower than the mate when the generator was running like  
115 Fluke and 123 mate.  I called tech support and they told me that  
the Fluke needed recalibration!  So I grabbed four meters, three  
inverters, three mates, and three generators and tested them all out  
in different combinations.  Guess what?  The mates consistently read  
higher by several volts than all the DMM's with all the generators.   
Inverter power measured the same with mates and DMM's.

I also have experienced the "normal" voltage fluctuations(pulsing)  
while charging.  A single VFX charged steady but when a second VfX  
was stacked the charging fluctuates.  First tech support  questioned  
the size of the battery(8 L16H) and then told me this was normal  
operation.  Maybe normal but it is still annoying.  Just like the  
generator breakers tripping when the Outback charger is loading the  
generator at capacity and a vacuum or a clothes washer is turned on  
(limiting the max ac in does not prevent this, only limiting the  
charging amps to bring down generator base loading does).

Jeff Wongstrom
NABCEP Certified Solar Installer
Thirsty Lake Solar
406-889-5324


On Aug 21, 2007, at 8:51 PM, Jay Peltz, Peltz Power wrote:

>
> Hi All,
>
> I've got a Dual PP VFX 3524 with 3000 amp hr battery new system.
> Yep same one that I was called out on.
>
> I've fixed most of the problems but I can't seem to understand or  
> fix the following.
>
> The AC volts will fluctuate 3-5v with no load change. It'll hold  
> steady for a bit, minute or two, then in the space of
> 10 seconds it'll do its 3-5v deal, then back.
> Also I've got up to 9v difference between what the Mate says and  
> what the volts are actual.
> ( all measurements with Fluke 87)
>
> And when the AC loads go up the voltage numbers can get even more  
> extreme, and be either higher or lower than what the mate says.
>
> Mostly the customer wouldn't care, but the darn fan in the  
> refrigerator keeps going up and down, drives him crazy.
>
> Outback Tech support says this is normal, may be but I haven't seen  
> this on any of the many multi inverter systems I've installed.
>
> Any ideas or experiences?
>
> thanks,
> jay
>
> peltz power
>
>
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