Although "widely available" documentation seems obvious for community members, we have to point out that we have a community resource gathering this information, at least for Zeros:
http://zeromanual.com/index.php/Main_PageBeen riding a BMW R1150 and love it. Considering a second bike for when ever it's down but I've considered this for a while now since it's really never down. Eventually I'd like to go electric but here are my concerns, in order. Any insight is appreciated.
I advise considering a Zero as a daily rider and using the BMW as a trip bike or backup when the Zero is down/serviced. That's what I do with my V-Strom 650.
Silence
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I'm aware that alert and competent riding is the majority of safety but being seen and being heard can only be helpful.
That being said, are there mods available that'll make an electric sound like a harley? Again, I know helmets save more lives than loud pipes but why not take take the extra safety measure, and (to me at least) the sound makes for a far more enjoyable ride.
A handful of electric riders have done this:
http://zeromanual.com/index.php/Advanced_Modifications#Sound_Systemhttp://electricmotorcycleforum.com/boards/index.php?topic=3915I lane-split daily around the SF Bay Area on a Zero and feel safer on it than on a gas bike, because I'm never lacking in torque and I set regen so I can slow down very early in my reaction time if other drivers start to put me at risk. Of course, they can't hear me at all, and that adds a risk that they'll pull into my lane, but overall I feel less safe on my V-Strom 650 than my Zero because I have to work harder to react to every change (even with tuned levers) and my torque is never quite as easily available.
I do use better mirrors to track my blindspots on a Zero because cars will more readily pull into your lane without the "warding-off" factor of noise, but I like having blindspot mirrors more than configuring a sound system and keeping it maintained so the wiring doesn't fail, etc.
One factor of a silent bike is that you can hear cars' motion easily, right down to their tire noise. The awareness factor is larger than you suspect.
Water exposure
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I park my bikes and cars on the street, I don't believe in garage queens and my life is so busy I don't have time to put on, take off, and store, a tarp. I ride in the rain as well.
Can the battery withstand both being parked in a rainstorm and being ridden through rain or is that going to be iffy?
It does add a little risk to the various circuit boards on the bike (mitigated by an informed strategy of applying dielectric grease around electrical connectors and some openings), but the main issue is how to keep the bike charged regularly. Where would you charge it?
How many miles per day do you commute? The ratio of that to the vehicle's rated range will give you an idea of how many days you can go without charging.
You'll get more value out of the bike if you can conveniently charge it every night without more than 5 seconds' worth of effort, so every morning you have its maximum range available.
Charging
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The electric cars need a separate chunky (and rather expensive) charging station. I rarely ride long distances but if I do need to charge, can the electric bike simply plug into an outlet via extension cord or is there anything more elaborate required?
The Zero by default only plugs into 110V (or other household outlet) at 1.3kW for an 8-hour charge. If you need an extension cord, unless you run at 220V, you'll have to choose the extension cord carefully to avoid causing problems from heat:
http://zeromanual.com/index.php/Unofficial_Service_Manual#Charger_Power_CordIdeally, plugging a bike into 220V household power or an EV station will charge faster with less risk.
Maintenance
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I'm reading the broadsweeping statement "maintenance is less for electric bikes" but parts/components are parts and parts fail and need to be replaced.
Is there less maintenance required for an electric because there are fewer parts and/or the parts are easier to access or is it something else?
The Zero requires less maintenance, lacking oil, coolant systems, transmission, clutch, chains, etc. Brammos are a little more complicated. The Zero just has fewer systems to maintain (tires, brakes, belt).