[RE-wrenches] Small Scale DC Lighting Distribution

[Darryl Thayer]

Battery to distubution, I would use a T fuse and a battery breaker to shut off the distubution panel.  
I would distubute with a Sq.D QO panel. I believe the max breaker size for DC rating is 60 amps on QO breakers.  

Do you mean 30 watt or 30 watt equivelent leds?  the 30 to 50 watt led is very large.  

do your voltage drop calculations, to determine wire size.  
DT   

--- On Tue, 10/26/10, Jason Szumlanski <Jason at fafcosolar.com> wrote:

> From: Jason Szumlanski <Jason at fafcosolar.com>
> Subject: [RE-wrenches] Small Scale DC Lighting Distribution
> To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
> Date: Tuesday, October 26, 2010, 5:51 PM
> We have an opportunity to do two
> small scale 24Vdc lighting systems at
> an off-grid location run off PV and batteries. We're
> talking maybe 8-12
> LED fixtures drawing 30-50W each (on motion sensors).
> However, we might
> want to plan for future expansion. Question: what are you
> doing for DC
> distribution in cases like this? I am considering a Midnite
> DC
> disconnect box with DIN rail mounted DC breakers.
> Otherwise, I might go
> with a class T fuse and holder with a Square D QO load
> center.
> 
> In each case I am looking at a small battery bank and
> appropriate PV
> with a Morningstar controller. Any thoughts on PV circuit
> protection?
> 
> The system we are replacing is kind of sad, using inline
> automotive
> fuses and a lot of exposed wiring. Ultimately, it would be
> nice to have
> a flexible but completely integrated system.
> 
> Jason Szumlanski
> Fafco Solar
> 
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