coolfx
Member
- Joined
- Dec 19, 2016
- Messages
- 78
After a bit less than 2 months collecting cells and reading a lot on differentsupports about 18650, powerwall, e-bikes, e-cars, it's time to get serious.
General idea
I plan first to build one or maybe two7S array of 100Ah banks, charged by a PWM controller I have and 3 * 215Wc panels, as inverter i have my old 950W 24v UPS.
Next step will bePIP 2424 MSE or MSXE and 3 more panels.
Cells/packs
I already tested a bunch of cells, I have 350+ already in packs, maybe 50 under 1600mAh I keep for other projects and few hundreds cleaned waiting to be tested.
I designmy packs to achieve 100Ah, sorting cells by capacity:
pack 1: 1600-1799
pack 2: 1800-1999
.
.
.
pack 7 : 2600-2799
I also build specials packs based on same source, like 40 or 60 cells bikes packs, I thing it's a good thing to keep theses cells together as they where all their previous live, tested capacity tend to confirm as their are all close.
These results at the moment in one Samsung 22F based pack and I have the same to process an next a 29F based one.
All my packs willhave approx 10% capacity installed but not wired, so in case a cell break or a pack is a bit weaker I can add fuse wire to one or few cells without having to rebuild the entire pack.
Now I need to buy 4 or 6mm solid copper wire for the busbars.
Don't hesitate to give your opinion if Igo wrong on something
General idea
I plan first to build one or maybe two7S array of 100Ah banks, charged by a PWM controller I have and 3 * 215Wc panels, as inverter i have my old 950W 24v UPS.
Next step will bePIP 2424 MSE or MSXE and 3 more panels.
Cells/packs
I already tested a bunch of cells, I have 350+ already in packs, maybe 50 under 1600mAh I keep for other projects and few hundreds cleaned waiting to be tested.
I designmy packs to achieve 100Ah, sorting cells by capacity:
pack 1: 1600-1799
pack 2: 1800-1999
.
.
.
pack 7 : 2600-2799
I also build specials packs based on same source, like 40 or 60 cells bikes packs, I thing it's a good thing to keep theses cells together as they where all their previous live, tested capacity tend to confirm as their are all close.
These results at the moment in one Samsung 22F based pack and I have the same to process an next a 29F based one.
All my packs willhave approx 10% capacity installed but not wired, so in case a cell break or a pack is a bit weaker I can add fuse wire to one or few cells without having to rebuild the entire pack.
Now I need to buy 4 or 6mm solid copper wire for the busbars.
Don't hesitate to give your opinion if Igo wrong on something