Taken from: http://www.netnewsledger.com/2012/06/27/solar-simplification-its-finest/
(parenthetical note: the design of this cart seems poor: how about this:
e-trike model - Dragon
price was around $2800-tax included.
Stock Power Requirements 4-12v @ 20amphrs batteries in series to give a 48v system.
Retrofit: 3-50watt panels (each panel, 2.9amps @ 17v and weight around 12 lbs
Additional Material and parts, aluminum angle iron, 5/8 aluminum rod, nuts and bolts
tools for the build, a cordless drill, files, hacksaw, hammer, punch.
Total assembly time was about five days.
Two days for bolting the three 50 watt panels together, and using the angle iron for added strength and rigidity.
Three days to build the mounting system to secure the panels to the deck of the e-trike.
The aluminum rod was used to attach the panels to the mounting brackets on the deck of the trike and allow the panels to be orientated to the sun when needed.
Total cost of the project, $3600.
extended the range from 50km (using only the batteries), to an estimated range of 200-300km on a sunny day and 75-100kms on really cloudy day.
The owner has plans:
A tow behind solarized trailer that can be used with a solarized e-trike, can easily be adapted to use as a mobile trailer to live in..
1. line the outside with cloroplast and line the inside with r5 ridgid insulation. use it to sleep in at night, body heat will keep u warm at night even in -30c,
2. resisitive and passive solar gain from daylight for extra heat or energy to produce h2 for cooking.power to keep the e-devices top up.
3. collect the rain water, use the sunlight to sterilize it for consumption.
says the owner
"use it as a home for a yr, $700 per month rent or morgage savings x 12months =$8400 per yr.
the solarized e-trike and solarized trailer for $5k, now gives a return of $20k+ per yr and growing.
that $5k investment now supplies transportation, electricity and a place to sleep and stay warm and dry. park it by a lake, u get to fish. park it by ur place of employment, pump ur wages into saving for a yr, use that $20k saving to buy a home."
Other solar powered electric bikes:
The electric bicycle's efficiency translates into about 1000 miles per gallon gas, not bad at today's gas prices. Electric bikes are fairly powerful and therefore need to store about 200-500 watt of energy in their batteries to travel the desirable range.
Some companies now offer roll-up solar panels from 25 to 75 watts of output. Three of those solar panels in series will provided the now common 36 volts used in most electric bicycles and could recharge your e-bike while at work. The solar panels roll up small enough to place on the rear rack including the charge converter. Non roll-up panels are more efficient but are not that easily transported, they might require to be installed at home or/and work.
There are prototype bicycle trailers like the Bob motor trailer which have an electric motor, batteries and fold-out solar panels - all mounted on the trailer that can be un-hooked from the bicycle in 5 seconds if not needed.
It is usually recommended to use batteries larger than needed for one trip, it allows you to ride on some of yesterday's sunlight in case you need to run home early or the sun has not been out at all. Most solar panels now do not need direct sunlight to work but will not quite run at 100% capacity on a cloudy day.(from http://www.nycewheels.com/solar-powered-electric-bike.html)
Japanese 72 km/hr solarized ebike
Front and Back
Now check out this bad boy from Stealth
And these power bikes
Here is an oddity: ultra small wheels - incredible power
For more on this see:http://www.thekpv.com/
Bob Trailer accessory