Looking for a DC input PSU

[SteveDessinger]

I am currently building a house which will be solar powered. It seems silly to run power from the battery bank through a DC-AC inverter with 80-90% efficiency then through an AC input PSU which then inverts to DC with 70-90% efficiency. That is a lot of power loss from the battery bank to the motherboard.

I haven't been able to find anything so far bigger than 120W DC-DC PSU designed for use in cars. I want something in the 500-700W range.

Thanks

 

[myocardia]

Unfortunately for you, they don't make ATX DC to DC psu's that big. Keypower makes 300 and 350 watt models, though. You could use a case that holds two power supplies, and you'd be set.

 

[SteveDessinger]

Thanks for the info.

The efficiency listed is 65% under typical conditions- so I might be better off just getting a high efficiency AC input PSU.

 

[Zepper]

Welcome to the AT forums.

I think Fortron/Sparkle make some and perhaps Zippy.com

.bh.

 

[heymrdj]

Mean Well makes quite a few. http://www.meanwell.com/search/webform1.aspx (look at bottom of page)

I see one enclosed model that puts out 1kW, but i didn't take time to see what output that was. But many of those big ones take a 48V input at some pretty hefty amperage. At least 4G power line probably.

 

[myocardia]

Originally posted by: heymrdj
Mean Well makes quite a few. http://www.meanwell.com/search/webform1.aspx (look at bottom of page)

I see one enclosed model that puts out 1kW, but i didn't take time to see what output that was. But many of those big ones take a 48V input at some pretty hefty amperage. At least 4G power line probably.

Those aren't power supplies, they're DC to DC converters, which is totally different.

edit: I finally found a 500 watt model: link. Unfortunately, it seems to be an Australian site.

 

[Modelworks]

http://www.jageson.com/product.php
Not sure of the price.

 

[kush23]

i work at a electronics distributor... PM me what you need... i don't know much about PSU's but i'll ask my boss

 

[SteveDessinger]

Thanks for all the replies

Many of the higher watt models seem to need 48V input. My place will probably be wired with 24 or possibly 12V input. A lot of them also do not seem to be too efficient or have a second 12V plug for PCI Expess. So I will probably end up going with a high efficiency AC input.

Thanks for the welcom and all the replies
Steve