[RE-wrenches] Reliable 48 to 24 V DC to DC reducer

[Sindelar Solar]

While not as inexpensive as David's solution, I have used Mean Well 
converters with success. This manufacturer supplied the DC-DC step-down 
converters used by Wattsun for their tracker drives, so there's a pretty 
long history with them. Check out 
https://www.trcelectronics.com/View/Mean-Well/RSD-200C-48.shtml.

Allan

On 9/15/2018 9:31 AM, David Katz wrote:
> I have had great luck using cheap LED drivers. They say 110-240 vac 
> input but they rectify the input to DC. I have used them to run 12 and 
> 24 volt stuff off of 48 vdc and even 400 vdc. They operate down to 
> about 35 volts dc. They are available in a variety of output voltage 
> and current. And they are isolated.   And they only cost a few dollars.
> https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F152134115704
> David Katz
>
> On Sat, Sep 15, 2018 at 7:58 AM Drake 
> <drake.chamberlin at redwoodalliance.org 
> <mailto:drake.chamberlin at redwoodalliance.org>> wrote:
>
>     Since Solar Converters seems to have evaporated, I'm not sure
>     where to look for a 48 to 24 V DC to DC converter. Samlex has 24
>     to 12. It seems like someone mentioned a Canadian company that
>     makes these.
>
>     I need to step down power from a 48 V battery bank to power El Sid
>     pumps for an offgrid hydronic  heating system.
>
>     Thanks,
>
>     Drake
>
>     Drake Chamberlin
>     /Athens Electric LLC
>     OH License 44810
>     CO License 3773
>     NABCEP Certified Solar PV
>     740-448-7328
>     /http://athens-electric.com/
>
>     _______________________________________________
>     List sponsored by Redwood Alliance
>
>     List Address: RE-wrenches at lists.re-wrenches.org
>     <mailto:RE-wrenches at lists.re-wrenches.org>
>
>     Change listserver email address & settings:
>     http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
>     List-Archive:
>     http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
>     List rules & etiquette:
>     www.re-wrenches.org/etiquette.htm
>     <http://www.re-wrenches.org/etiquette.htm>
>
>     Check out or update participant bios:
>     www.members.re-wrenches.org <http://www.members.re-wrenches.org>
>
> -- 
> David Katz Sent from Gmail Mobile
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
-- 

*Allan Sindelar*
allan at sindelarsolar.com <mailto:allan at sindelarsolar.com>
NABCEP Certified PV Installation Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
*505 780-2738 cell*

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/attachments/20180915/6fe69644/attachment.htm>