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Location: Val d'Espoir, Quebec, Canada, zone3a at the bottom of a valley
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Edge case submission
Note1: oops, did'nt see it was only the battery energy for the 100watt for 6 hours. Will connect one of my house trojan agm battery, 102ah@10hr, and get a new picture as soon as i can.



My submission for bb small dc system.

Took a car battery and a reused system that i had stored. I didn't have the info on the ah of the battery, but searching on the net, i found the calculation about the reserve capacity (RC)  tagged on the battery on the calculation to use it.

source: Calculator academy web site

AH = BR *60 *25 / 3,600
   Where Ah is the amp hours
   BR is the battery reserve capacity (minutes)

My BR is 90 minutes, so
90*60*25  / 3,600 = 37,5ah usable energy

37,5ah * 12v = 450w, missing 150w

The panel is rated for 2,2a and 17v
2,2a *17v *6h =  224,4w

So with a full battery and a bright sun and perfect angled solar panel, i can achived 100w for 6hours.
450w+224w= 674w

For a regular 100w consuption of energy, i would install a bigger panel or battery.
20220812_140522.jpg
material
material
20220812_140409.jpg
panel info
panel info
20220812_140332.jpg
battery info
battery info
20220812_150524.jpg
panel installed
panel installed
20220812_150742.jpg
system installed
system installed
20220812_151620.jpg
view on the 12v cig plug and 5v usb outlett
view on the 12v cig plug and 5v usb outlett
20220812_151609.jpg
cell phone charging
cell phone charging
Staff note (gir bot) :

James Alun approved this submission.
Note: You've achieved the technical ability for the construction of the system. In the future, I would like to see the wiring tidied up please. And a quick point aboit your calculation, multiplying by 60 and then divig by 3600 converted minutes to seconds to hours, (90*25)/60 would have been sufficient.

Staff note :

Discussion is ongoing behind the scenes about this BB submission...  Unapproving it for the moment...

Staff note (gir bot) :

Someone flagged this submission as an edge case BB.
BBV price: 0
Note: Sorry. A 100 watt bulb requires 8.333 amps at 12 volts.  8.333 x 6 hours = almost exactly 50 amp hours. It appears your battery is a little too small to meet this posted requirement "Explain how the battery(s) will put out 100W for 6 hours." Using an inverter would introduce losses that would increase the overall power needs even more.

 
My cellmate was this tiny ad:
Work Trade for the 2023 Garden Master Course
https://permies.com/wiki/190487/permaculture-projects/Work-Trade-Garden-Master
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