Learning about Direct Coupling [RE-wrenches]

[Jerry Caldwell]

Mark,

PowerLight has done installations where the PV ties in
directly to DC lighting systems via Nextek's "power
modules".  This link is to a press release for one
such system.
http://www.powerlight.com/company/pressreleases/co_press_details.cfm?press_release_id=29

Jerry Caldwell
Light Energy Systems

> 
> 
> Mark Robinson wrote:
> > I need to become an 'instant expert' on Direct
> Coupling of PV to 
> > lighting
> > loads in commercial buildings. Has anybody had any
> experience with this?
> > Anybody want to learn with me?
> > 
> > NexTek Power creates an AC/DC ballast that powers
> flourescent lighting 
> > on AC
> > or DC.
> > 
> > Efficiency Concerns: No Inverter increases
> efficiency. Getting power 
> > from
> > the panels at low light, before an inverter would
> kick on. More 
> > efficient
> > ballasts. What kind of low power losses are we
> seeing in panels before 
> > the
> > inverter comes on?
> > 
> > Installation Concerns: No Grid-tie approvals. What
> about DC wiring? DC
> > switching?
> > 
> > Other concerns?
> > 
> > Will welcome any feedback on or off-list.
> > 
> > Thanks,
> > Mark Robinson
> > The Energy Grid
> > Mark at TheEnergyGrid.com
> > 
> > 
> > 
> 
> 
> 
> Brad Bassett
> Schott Applied Power 
> Tumwater, WA office
> bsbassett at earthlink.net
> 
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