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18Kwh - 12v off grid Powerwall
#11
(12-03-2017, 02:05 PM)Korishan Wrote: @jestronix: You don't need to post multiple threads for the same project. You could of asked your wiring question here as it directly pertains to your build.  Makes it easier to follow your build  Wink

Hi Korishan , good idea , wasn't sure if the wiring question was a general, but ur right it's this build. Smile

Well I just soldered 80 glass axial fuses and man it just about killed me compared to fuse wire! With fuse wire you can just keep the wire going and use your thumbnail to go pretty quick. But the glass fuses like average joes packs, is hard work. Your having to line things up and fiddle.

I'm not sure I'm going to continue with glass fuses ! That was easily three times the work.
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#12
Hi. Im not one to talk but with that many solder joints in front of you my advise is to set up a fume extract. All that flux and lead cant be good for you.
When I prepare my cells for soldering I never totally remove the spot welded tabs, this way you do not need to heat up the battery when attaching wires as the tabs are easier to solder to than directly to the battery posts.

Good luck.

Mark
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#13
I was just thinking, can't we use one of those desktop HEPA filters?

https://www.amazon.com/Holmes-3-Speed-Pu...B0000DK35B
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#14
(12-04-2017, 09:23 PM)Mark Kennard Wrote: Hi. Im not one to talk but with that many solder joints in front of you my advise is to set up a fume extract. All that flux and lead cant be good for you.
When I prepare my cells for soldering I never totally remove the spot welded tabs, this way you do not need to heat up the battery when attaching wires as the tabs are easier to solder to than directly to the battery posts.

Good luck.

Mark

My soldering efforts are done outside :Smile with a big fan on,  fumes are pushed aside.
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#15
Nice 12v build there. I have a bit of a soft spot for 12v  Wink

Which cells are you using, are they recycled...all the same or random cells?
                                                Choose LiFe  Wink

                      May all your batteries be fully charged and perfectly balanced  Cool
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#16
(12-07-2017, 10:28 AM)Wattsup Wrote: Nice 12v build there. I have a bit of a soft spot for 12v  Wink

Which cells are you using, are they recycled...all the same or random cells?

Thanks , yes these are all the same cells, the Sanyo heaters. So far about 15% or so are heaters.  They are all used cells.  Yes 12v is great for small builds :Smile  

As a kid we lived too far from the power lines and lived purely off two 40w panels, we had halogen lights (no leds back in the 80s). I'm amazed how well we did, a small tv, stereo, lights and even a water pump.  Living off almost half a kilowatt a day, it blow me away today when we chew 20kWh a day.   In reality we had a gas fridge and solar hot water, so maybe we were more like 10kw a day Smile
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#17
Testing begins :Smile some tidying of cables to be done, this is just my test rig with low current draw and a max 30amp on these packs.






90 amp XT connectors :Smile doubled for 180 amp constant which these packs won't go near Smile
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#18
Lookin nice!! Ohhh, but OCD kicking in, you need to the move red cell slightly to the left, it's outta of alignment Tongue
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Certified 18650 Cell Reclamation Technician

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#19
Yeh glad they'll all be hidden when I finish, otherwise I'd be out there all day lining them up!
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#20
Looking really good man.

What make/ model are those charge controllers?
                                                Choose LiFe  Wink

                      May all your batteries be fully charged and perfectly balanced  Cool
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