Grid fluctuations [RE-wrenches]

[William Miller]

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Drake:

It is my understanding that SMA can reprogram a Sunny Boy for a higher AC 
voltage acceptance parameter.  There are legal requirements such us 
obtaining some kind of letter from the utility.  Check with SMA tech support.

William Miller


At 04:26 PM 6/28/2007, you wrote:

>hi Drake
>   If you have 137 on the grid the sunny boy should kick out as the limit 
> for 1741 is 132volts.
>   YOu may be able to get the utility to lower your voltage by one 
> transformer tap, which is usually 4 volts.
>
>   I have an outback system that keeps transfering when the grid has bumps 
> and dips.  I am working this problem, and hope to try a manual setting on 
> drop out to less than 108 volts.  My problem is from the well pump 
> starting and droping the voltage to below 108, but I can put my peak 
> ;hold on the meter and look at these swings.  My peak capture is only for 
> a few minutes however.
>   I have seen short term spikes due to grid switching when they switch 
> transformer taps, they are fast and hard to catch.  .
>Darryl
>Drake Chamberlin <Drake.Chamberlin at redwoodalliance.org> wrote:
>
>Hi Wrenches,
>
>We have a Sunny Boy that keeps shutting down for periods, then
>restarting. We have measured grid voltage of 137 VAC per phase, and
>think that is the problem. The utility company is claiming that the
>grid is fine.
>
>Does anyone know where we can get a recording voltmeter to put on the
>grid. There is no Internet access at the location. We just want to
>be able to record the voltage over time. We suspect that their may
>be short term spikes, which we would like to catch.
>
>Thanks,
>
>Drake


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