parmenps wrote:and this battery is this a good whan: http://www.bmsbattery.com/48v/129-48v-1 ... -pack.html
I don't have any experience with their batteries nor do I know anyone who has, maybe if you post in the battery section someone might be using one.
But the specs are O.K for lower power use, 40 amps max on acceleration, so I would set my controller to 20 amps or just buy a 20 amp controller, most 1000 Watt kits won't come with more than a 20 amp controller anyway.
It probably won't last quiet as long as the LiFeP04, but it will be smaller and lighter, just don't forget the rack for that battery if you decide to get it.
It has a claimed 800 cycles, if you charge twice a day, 7 days ( because it's only 10ah ) That's 730 cycles, so you might get just over a year, less if you pull too many amps. You can always save for a better kit in the mean time.
I think you wanted something like 12 miles each way ? if so you should just about manage 1 trip full throttle and no pedal on level ground and charge at your destination.