28 series * 4.2 volts/cell = 117.6V top-of-charge. I think Zero switches to constant-voltage mode at 4.15 volts/cell = 116.2V.
Wow guys, very helpful input. It's almost like I'm not using the Internet. ;-)
I don't need fast charging at home, but I can wire up anything. I do not understand the use of a 110v charger as the default. I could see a 220v charger that can fall back to 110v, even if it isn't much more powerful, simply because it's more efficient. I realize the drawbacks of 110v, most of the world does, and that's why they don't use it... 2.5 to 3 hours is still better than 10. I'm trying to speed it up, but not at the cost of only working at certain J1772s, or needing two of them. Finding just one is a miracle around here. I've got to be able to use whatever little I can find. The Nissan Dealerships around here have the J1772s locked behind the fence after hours. The ones that have a CHAdeMO, have it available 24/7. But, those are over 200 miles away, just like the Zero dealerships. So, it looks like I've got a bit of room to flex in the top end of the bulk charge, and the power supplies I selected would have the adjust-ability to do it. Slightly over-estimated the rate of charge, but absolute zero SOC to 100% is not a real-world thing. Are these Manganese Lithiums? The charge profile and voltage seem to suggest it...
Programming regen in the app doesn't help when bad weather comes out of nowhere. Zero really needs to consider a button that stops regen while pushed. The concept of uncontrollable brakes is a bad idea, inclement weather or not. There is no clutch or shifter, so the respective body parts could learn a new trick. No starter button, either... There should be a "make it stop doing that" button for those emergency moments when you just need to freewheel for a second or two. There are lots of dirt roads adjoining to paved roads around here. Sand in turns you can't see yet is normal. Getting to my place is 2.5 miles of grass, dirt, and gravel that most people claim to "hear banjos" upon encountering, and run away... Perfect!
The battery warranty may seem long in the bike world, but when has this battery ever been in the bike world? This battery should have a 15 year warranty on it, not because bike, but because battery. If the BMS works as it should, this battery should live longer than I do. It may lose some capacity, but it should last at least 30 years of useful life. There's simply no excuse for it to be otherwise. The battery, if handled by the BMS correctly, does not care that it is in a bike, nor has being in a bike any impact at all on it's life-cycle. The short warranty tells me one thing, and one thing only; this BMS might be designed to deliberately destroy the battery. They wouldn't be the first. Lithium batteries fail in cell phones and laptops all the time, and it's not an accident. In the DIY electric world, BMSes have been designed to deliberately destroy batteries for decades. 20 years between sales just doesn't keep the champagne and caviar flowing... Lightbulb conspiracy, blah blah blah.
I'll probably hang back and see what happens in the 2015 models. I'm not expecting miracles, but they really, really need to do something about their remarkably poor choice of on-board charging. I live out in the country and rarely pass inside of city limits. When I do, I feel dirty and must get out as soon as possible. ;-) Their current selection of charging apparatus seems targeted at apartment dwellers and daily commuters. Or, just plain poorly thought-out. Many times the 110v charger would do fine for me, but I'd still prefer a dedicated 220v slow charger simply because it's less wasteful. I also have 5kw worth of solar panels that I haven't installed yet and should easily be able to DC pump the bike if I dreamed up some throttling circuitry. My concern is that when I have to/feel like going 250+ miles somewhere, I don't want to have to find a hotel every 100 miles and wait until the next day. It won't happen a lot, but it is a deal breaker if I can't do it. I almost bought a Tesla, almost... But that kind of car just isn't "me."
If I could go 30/98 on the sprockets, that'd be sweet. Would I be loading the motor enough that it might have a negative impact on efficiency? I heard there were some growling recalls... this could cause/exacerbate the same issue. People have been telling me that it'll destroy my Rebel for half a decade and more miles than said nay-sayers have put in their bikes in their whole lives. No problems and I don't care if it's slow. 13hp at the rear wheel is still more than I need. :-p
Again, thanks for so much useful input!