Beginners Guide to Processing 18650 Cells | Cell Database


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#1
Glenn here... 

I live on 20 acres off the grid.  Been like this since the 90s.  I have diesel and solar panels.  I got over 2ars from a nice set of 24 - telephone batteries.  They were 2 volt at 1180 amps each. I shallow cycled them.  I first had 4 - 12v batteries wired in parallel to a 2000w Trace inverter.  Now, I have a 3500w 24v outback pure sinewave and used forklift batteries.  The forklift batteries are not pretty like the clear cased telephone batteries, but they are affordable.   I have eight 165 Matrix solar panels and just added four 195 watt panels.  A TriMetric battery meter gives me the vitals.

I recently got a OneWheel.  It is powered by a 16 cell, LifePO4 battery.  I would like to be able to charge it up out and away so, I got a MPT-7210A MPPT solar charger.  It will deliver about 80 watts from the car battery.  I want to build either a 36v or 48v LfePO4 battery to power the solar charger.  I was thinking of using 32650 5.5ah batteries.  A 36v battery would give me one healthy charge and never come close to full discharge.  This way, I could take a battery and solar charger in a backpack if needed trail riding.
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#2
Welcome...

Small Solar panel on backpack will be too small current and too slow to charge up your Onewheel... you have to be direct sunlight in order to get max energy.
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#3
The battery would work but then its just easier to hook the battery in paralell with existing pack. Or with a DC/DC for charging.

Solar on your backpack wont be even close to enough to power the device but yes it could charge some % if you leave it in direct sunlight for hours or days Smile

Nota that a 250W panels is like 1,6meter*1meter big and those only give you perhaps 100-150W avg unless direct sunlight
Follow me! >> YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcomming: 14S 18650~30kWh | Automatic trip breakers, and alot more
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