G'Day Frank,
...don't believe that I stated that this would not
happen. I also derate modules. If Florin is concerned
about this, I would suggest that he utilize a charge
controler w/ MPPT...cost more but will put more watts
in under most conditions.
Enjoy,
Tom
--- Frank Fowler <[EMAIL PROTECTED]> wrote:
> Tom,
> When you hook the batteries up to the system, the
> charging voltage will
> drop to charge your batteries. 17 voltsdc listed on
> the panel is 17vdc open
> cirquit.
> SUNcerely,
> Frank Fowler
> Crystal Pines Alternative Energy
> 4408 Pine Cluster Ln. Yankee Hill, CA. 95965
> 530-532-1972
> www.solarenergy-alt.com
> [EMAIL PROTECTED]
> ----- Original Message -----
> From: "Tom DeBates" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Sunday, May 23, 2004 7:26 AM
> Subject: Re: [microhydro] Help!
>
>
> > Hello Florin,
> > I would suggest that you go to the website
> > www.nrel.gov for an overview of PV system basics
> and
> > some good links. Through these links you should be
> > able to find a chart to aid you in sizing your
> system.
> > If you cannot find one, I have developed one that
> I
> > use for these purposes.
> > good luck,
> > Tom DeBates
> > --- ffleseru <[EMAIL PROTECTED]> wrote:
> > > Hi guys,
> > >
> > > I'm very confused related to the PV energy
> > > production. I don't
> > > understand where is the truth.
> > >
> > > I need for example to use Daily PV Energy Budget
> -
> > > 1313Wh/day from a
> > > solar energy system, at 12 V/220V. (Only a TV
> set +
> > > lights)
> > >
> > > - Bright Sunshine - 6 Hours
> > > - 3 days of autonomy
> > >
> > > Based on my calculation the results are:
> > >
> > > - Total Rated Battery Capacity calculated 729 Ah
> > > - Using batteries at 6V/450Ah I need 4 batteries
> > > connected in
> > > series/parallel
> > >
> > > And if I'm using Siemens PV - SP110 with the
> > > following
> > > characteristics, 110W - 6.47A/17V
> > >
> > > Based on this then I need 3 modules on parallel.
> Am
> > > I right? But.here
> > > is the confusion that I have.
> > >
> > > Those panels produce according with Siemens
> specs at
> > > 6 h bright
> > > sunshine - 6x110W = 660W per day !.. but my
> system
> > > works with 12 V
> > > not 17 V!! .. So the results should be 6h x6.47A
> > > x12V = 465W ! . well
> > > my question is :
> > >
> > > Where are 200W?. because as far as I understand
> the
> > > max current
> > > generated will be 6.47Amps .. and not more?
> > >
> > > I hope you guys can help me !
> > >
> > > Thanks,
> > > Florin
> > >
> > >
> > >
> > >
> >
> >
> >
> >
> >
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