Bizarre clock behavior [RE-wrenches]

[John Raynes]

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I doubt it would be a voltage fluctuation, since those happen all the time 
on the utility side for various reasons.  Maybe the clock is synchronizing 
to zero crossings of the AC line voltage waveform, and that particular 
clock doesn't filter the AC as well as most, so a small amount of 
electrical hash induced on the line by the inverter is generating enough 
multiple zero crossings to throw things off.

Just a semi-educated guess.  If you've got a cheap line filter available, 
you could try that out.  Probably just as inexpensive to get a new clock.

John Raynes
RE Solar
Torrey, UT


At 10:34 AM 4/18/2008 -0400, you wrote:
>We have a customer whose clock radio is running fast by about 5-7
>minutes per day - but only while the sun is shinning - ever since we
>commissioned his 2.3kW Sunpower PV system.  The more power he makes
>the faster the clock goes.  My only thought is that the clock has such
>low resistance that a little extra current is running through it as
>power is being pushed onto the grid.
>
>Any thoughts?
>
>
>Andrew Truitt
>Standard Solar Inc.
>
>
>
>
>--
>"Don't get me wrong: I love nuclear energy! It's just that I prefer
>fusion to fission. And it just so happens that there's an enormous
>fusion reactor safely banked a few million miles from us. It delivers
>more than we could ever use in just about 8 minutes. And it's
>wireless!"
>
>~William McDonough


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