Battery technology is doubling every 2-3 years (which is why I am leasing the BMW C Evolution ). In 3 years, bikes will be doing 400-450 km on one charge at the legal speed limits. 5 years ago I tested the Blade electric mx bike that could do a whopping 20 minutes. Things have changed already.
Historically speaking, battery technology (price per capacity, capacity density per mass or volume) has been doubling about every 7-10 years. We've seen significant improvements in range from Zero recently due to installing larger batteries and overall price drops (ie 2012 $14k 340 lb Zero = 63 miles mixed riding, 2014 $15k 400 lb Zero = 93 miles mixed riding).
We'll see charge times and range/weight improve with time. But it's going to take significant time.
**
My gas car is a 2000 Honda Insight. It has a 10 gallon tank and gets 60-70 mpg. I stop more frequently to pee on a long trip than I do to refuel. I'd like to replace the 240-300 mile overnight round trips I do in the car with the bike, but the car can do a couple of those trips before having to refuel. In general the extra range over my previous car (350-400 miles) is interesting but not something I'd pay much for.
Batteries are likely to be precious for a long time, both in terms of cost and size. And gas bikes have shown that 150-250 miles of range is sufficient, provided refueling is convenient. Think about how easy it'd be to make a gas bike with 500 miles of range; no manufacturer builds a bike like this because there's no consumer demand because the existing range and charging options are convenient enough.
Consider this mapping between range and refuel time. Vehicle positions are rounded to the nearest power of 2, so take them with a grain of salt.
**
Ignore the technology for a moment, and let's just focus on bikes and cost preferences.
First, assume it's a Zero S-type bike weighing 400 pounds for 80 miles, 500 pounds for 160 miles, 600 pounds for 320 miles.
1. Assume for each refuel time that it is the best commonly available.
2. Determine what maximum price you would accept for a bike with 80 miles of range.
3. Repeat for 160, 320 miles.
Here's my off-the-cuff preferences:
50 minutes / 10 kW: 80 miles, $16000. 160 miles, $22000 (+$6000). 320 miles, $24000 (+$2000).
25 minutes / 30 kW: 80 miles, $17000. 160 miles, $21000 (+$4000). 320 miles, $22000 (+$1000).
10 minutes / 50 kW: 80 miles, $19000. 160 miles, $20000 (+$1000). 320 miles, $20500 (+$500).
What's funny looking at them as an aggregate is that I would pay the same amount (for example) for 160 miles / 10 kW as 320 miles / 30 kW .. but that's simply an artifact of additional range being less valuable as commonly-available refueling times drop.
Here's my optimistic predictions:
2014: 6 kW AC charging common. Big fight over DC charging standards (CHAdeMO, CCS, Supercharger, China).
2016: 10 kW AC charging common. DC standards settle, but deployment spotty.
2018: DC QC deployed along common travel routes. Bikes capable of 30 kW charging.
2020: DC QC commonly available. Bikes capable of 50 kW charging.
Here's what I'd like to see by 2020:
* Gigafactory packs available to various manufacturers
* $200/kWh pack level, 200 Wh/kg pack
* 10 kWh 80 mile pack $2000, 50 kg. Available in smaller bikes like Zero FX. Probably limited to 20 kW charge.
* 20 kWh 160 mile pack $4000, 100 kg. Available in larger bikes like Zero S, Mission. Limited to 40 kW charge.
* 30 kWh 240 mile pack $6000, 150 kg. Available in very large touring bikes like H-D, Brutus V9. Limited to 60 kW charge.