Check out
Ginge's thread regarding a variable voltage pedelec unit.
The fixed level of regen can be set with the usb interface lead but unfortunately it is not variable during use.
Here is an updated diagram for the Cycle Analyst wiring details:
The switch is optional, but it enables the Cycle Analyst throttle override to be connected or disconnected to quickly swap between restricted speed/power and unrestricted speed/power.
The original solution to the Cycle Analyst problem can be seen
here.
The 24V battery will give a top speed of around 15mph and the 48V battery will be around 25mph.
The motor's power with a 48V pack would be at least double that of the 24V. If you're using the Cycle Analyst to limit your speed and power, either voltage can be used for a road legal bike. Higher voltage is much more fun off road, but it will also drain the battery far quicker as you will be drawing more power from the pack with faster acceleration and higher speed.
I haven't tried chain drive motors, but I seem to recall that they are considerably noisier than a direct drive hubmotor.
A twist throttle will be far more natural to use and the installation looks neater too, but it can be a problem to install if you also have a twist type gear-change mechanism. One disadvantage with the twist throttle is the chrome end caps that stick out on each side actually increase the width of the handlebars by about 2 inches, which can be a pain when negotiating narrow openings, or squeezing between two lanes of traffic waiting for the lights to change.
I have a twist throttle with lever operated gears on my main bike:
I had to install a thumb throttle on my MPIII powered chopper style bike:
although I really would have preferred to use a twist throttle, but unfortunately it has the original twist type gear-changers .
I'll let Gary answer your question regarding the shipping costs.
GM no longer supply the LiMnO
2 packs, so now they only sell the LiFePO
4 packs, and I would expect the the LiFePO
4 packs top be nearer 2000 charges than 800. I'm guessing GM have not fully updated the website yet.
Check out
Gary's Website to see what he currently has in stock.
"When you look at the page for each item if the option for "add to cart" is there then it is in stock. I do my best to ship everything with 1 or 2 days"
There have been a lot more external controllers fail than the newer internal MPIII controllers, and a lot of MPIIIs have been sold since they were launched last year, but Gary is in a much better position to comment on this than I am.
Alan