[RE-wrenches] Slow clocks

[toddcory at finestplanet.com]

I wasn't going to say anything, but electric clocks off-grid? really???

Todd



On Monday, April 4, 2011 6:20pm, "Kent Osterberg" <kent at coveoregon.com> said:

> Kris,
> 
> Even with generators using an electronic governor, the frequency changes
> with load. Also while inverters are stable their frequency is not as
> accurate as utility power. Clocks that use the ac frequency as the time
> standard will not work reliably when powered with off-grid power. Such
> should be disclosed in any contract to install an off-grid power system.
> 
> Kent Osterberg
> Blue Mountain Solar
> 
> 
> Kristopher Schmid wrote:
> > I have an off-grid client who tells me that his clocks lose about 1 minute
> > per hour while he is running his backup generator.  Has anyone seen this
> > before?  Do clocks use the zero crossing on a 60Hz wave for keeping time and
> > could a frequency discrepency in the generator cause this?
> >
> > My thanks to the brain trust...
> >
> > Kris
> >
> > Legacy Solar, LLC
> > 864 Clam Falls Trail
> > Frederic, WI 54837
> > 715-653-4295
> > solman at legacysolar.com
> > www.legacysolar.com
> >
> > _______________________________________________
> > List sponsored by Home Power magazine
> >
> > List Address: RE-wrenches at lists.re-wrenches.org
> >
> > Options & settings:
> > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
> >
> > List-Archive:
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
> >
> > List rules & etiquette:
> > www.re-wrenches.org/etiquette.htm
> >
> > Check out participant bios:
> > www.members.re-wrenches.org
> >
> >
> >
> >
> _______________________________________________
> List sponsored by Home Power magazine
> 
> List Address: RE-wrenches at lists.re-wrenches.org
> 
> Options & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
> 
> List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
> 
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
> 
> Check out participant bios:
> www.members.re-wrenches.org
> 
> 



Sent from Finest Planet WebMail.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20110404/ea27fa76/attachment-0003.html>