Laser inquiry [RE-wrenches]

[Bob-O Schultze, Electron Connection]

<x-flowed>Yo Sharkey,
I don't know the mechanics of HOW it does it, but the laser grooving 
method gives a higher cell voltage than single or multicrystal cells. 
Doesn't do anything for extra current however.  You you get a module 
that is rated a 18.5V instead of 17V at the power knee. Since the 
manufacturers figure the selling price based on peak V X A = Watts, 
what would be a 75W Siemens, for example, comes out as an 85W BP 
laser grooved. Hence, the extra bucks. The extra voltage might come 
in handy in a place where it is overcast a lot. It might come in 
handy in an array direct application like water pumping. And, it 
might buy you something if used in conjunction with a good MPPT 
charge controller. Is it worth the extra dough? I don't think so, but 
then I'm a Siemens kinda guy too. Some folks like Fords, others 
prefer Chevy or Dodge.
Bob-O

>	List;
>
>	Received a mail from a friend in B.C. asking about PV's he 
>can buy locally:
>
> >Nobody in town deals with Siemens panels... it's all
> >those BP units around here. Yeah, they're really
> >pushing the "laser grooved buried grid" thing on the
> >BP-85 panel, but for $200(CN) over the BP-75, is it really
> >worth it?
>
>	Anybody want to chime in with a reply about these? I'm still fairly
>"stuck" on the Seimens SP75's, but maybe the BP's are a good choice for him?

Bob-O Schultze, Electron Connection
PO Box 203, Hornbrook, CA 96044
800.945.7587 or 530.475.3402
fax 530-475-3401
www.electronconnection.com

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