[HacktionLab] BGG letter - power

Adelayde Skidmore adelayde at riseup.net
Fri Jun 17 15:53:04 UTC 2011


> This is about sound systems, but I guess power is power.
>
> http://mbharris.co.uk/12-volt-sound-system-battery-calculator/
needs a bit of expansion that, perhaps I should move it over to the wiki
for us all to be able to work on??
>
> HTH
>
> G
>
> On Fri 17 Jun 2011 12:50:13 BST, protag [protag at aktivix.org] emailed
> subject: "Re: [HacktionLab] BGG letter - power" saying ...
>
>
> > Hi
>
> >>
> >> Excuse my ignorance on this but could that kit provide enough power
> to  
> >> run a LTSP suite with let's say 10 to 15 clients + the internet dish  
> >> (we are not sure yet if we'd need it but let's count on it).
> >>
> >> @BenG could you please give us more details of the amount of power
> the  
> >> above kit would need?
> >>
> >> Cheers
> >> Llanos
>
> > By the way, sorry I missed you all at camp this year :(
>
> > About power - there's a doc on the Hacktion lab wiki somewhere* talking
> > about a similar thing to this. As I recall there's a long list of
> > multiplications then a conclusion which I read as "we didn't like the
> > answer so we tried again". :)
>
> > Those six panels make 480watts when it's sunny. There are four batteries
> > which are nominally 270Ah each.
>
> > So, er, I dunno, four hours of serious sun is approx 2kWh per day
> (or 200w
> > for 10 hours)
>
> > The reserve power of the batteries is probably 4 x 200Ah, so, 800Ah
> @ 12v
> > = 9.6kWh
>
> > I did a half-baked hung-over skill-share on 12v solar & batteries in
> 2010
> > (actually I can't remember the title, it was Chan's thing but no one
> woke
> > him up) - I'd like to do it again sometime but with some preparation and
> > documents to hand... esp now I've seen that Prezi thing...
>
> > Anyhow, I think the answer is, yes, enough power, even if it rains for a
> > few days.
>
> > sols
>
> > ptg
>
>
>
> > * it's here:
> >
> http://hacktivista.net/hacktionlab/index.php/Camp_for_Climate_Action_2008_Power
>
>
> > _______________________________________________
> > HacktionLab mailing list
> > HacktionLab at lists.aktivix.org
> > https://lists.aktivix.org/mailman/listinfo/hacktionlab
>

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