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[aprssig] backup pwr systems

Bob Bruninga bruninga at usna.edu
Tue Dec 12 04:20:11 UTC 2006

> Best to just stick with a standard UPS for each item
> (or group of items) you want to keep powered or go
> with a grid-tie inverter system.  Having something that
> plugs into the wall as you describe is a sure-fire way to
> electrocute a line worker when the power goes out
> (because you don't have an anti-islanding relay
> installed as would normally come with a grid-tie inverter).

You didnt read my original post.  I proposed a synchronous inverter that can only generate power when there is already 60 Hz power there.  None when there is not.  I agree, safety is paramount.  Bob

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