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Greetings from Sweden
#1
Hi everybody,

I'm a city dweller that for a long time have planned an off grid cottage to spend a week in now and then. Started picking up and old laptop cells at the recycling center a few months ago when I had a lot of business going there to get rid of the excess stuff we've gathered though out the years and now was moving to a new apartment. Now sitting here with some 160 cells averaging 2Ah. 

The plan is to start with 7s20p, run them at 3.3v-4.0v, maintenance charged using a 20W panel while I'm not around (there will still be some minimal load from some low power electronics so I don't want to shut it down) and a 250W panel when I'm there. According to my calculations this would mean some 0.5kWh available daily in the batteries when charged. The 250W panel should produce about 1kWh per day March-September, while the 20W produce some 20Wh per day during October-February with a low dip to 10W around the new year. I think it should work out just fine for now, enough to light up the cottage up, get music and be able to work on my laptop most of the day. We'll see if that works out once I get it in place. Might have to expand to 7s40p, but I hope my economy allows for switching to LiFoPO4.

Also been fiddeling with small DYI wind turbines, steam tubines and peltier generator for backup.

But for now I'm focusing on an as safe as possible 18650 pack.
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#2
What part of Sweden? Smile Greetings btw.

Im from Småland.
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#3
(02-20-2017, 03:33 PM)daromer Wrote: What part of Sweden? Smile  Greetings btw.

Im from Småland.

I'm in Skåne, so we're close Big Grin
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