It seems to me this is a job for a solid state relay.  But I have never had to 
do 500 VDC if it were AC it would be fine.  

Can you shut off the inverter reducing the DC to no load switching?  
The frequency is also important.  
Darryl


--- On Fri, 1/23/09, Dana Brandt <[email protected]> wrote:

> From: Dana Brandt <[email protected]>
> Subject: [RE-wrenches] automatic DC switch
> To: "RE-wrenches" <[email protected]>
> Date: Friday, January 23, 2009, 1:42 PM
> Hi Wrenches,
> 
> I have a quirky project where I need to toggle PV DC
> between grid-tie
> inverters and an electrolyzer for a fuel cell system. Does
> anyone know of a
> good product to switch 10A, 500VDC? It needs to be
> controlled remotely and I
> need to switch 24 seperate circuits.
> 
> Thanks a lot!
> 
> Dana
> 
> -- 
> Dana Brandt
> Ecotech Energy Systems, LLC
> www.ecotechenergy.com
> [email protected]
> 360.510.0433
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