auraslip wrote:The tenergy one says it's charges to 4.35v per cell - that'd be very bad for the lifespan of a pack charging that high. Most people here charge up to 4 or 4.1. I think those BMS are designed for different chemistries. I think the goodrum fetcher BMS can be used with lipo, but you need to replace some resistors. I wonder why no one is doing that?
I suppose that most lipo guys like myself are hobbyists and don't mind a little bit of inconvenience. Me, i just chop off a bit of the top and bottom of my charge.
auraslip wrote:Btw here is what I got when I checked cell prices from my sources:
headway 10ah cell x 12 = 192
prebuilt pack headways including 5 amp charger 36v10ah = 315
If you can get them for that much, they are a deal, although it sounds like you would be getting them from ev-assemble or something, which i would avoid like the plague.. erm actually maybe we shouldn't be talking headway prices, to respect the original poster.
auraslip wrote:Btw you vast overestimated the headway discharge rate. IIRC it's more like 3.5c for the regular cells, and 8c for the P "power" cells. So 35 amps and 80 amps respectively.
But then again, if you are building a serious commuter bike, you'll want range. So if you get a 20ah or 16ah pack your continuous power rating is much higher.
Ahh, all the official specs i've seen say 5c but i figured that was a bit high.
Yeah, 3.5c isn't bad if you have 16ah.
The problem with 16ah is fitting the damn things in the frame though.
Meanwhile i can fit 20ah 10s into my frame, no problem. And the packs are so narrow that they don't interfere with pedaling.
Too bad they don't make pouch cell headways..