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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