Joey wrote:+1 for DrunkSkunk's comments
* more than 48V and 20Ah and you're more in motorcycle territory than e-bike
I agree with Joey. As IÂ´m just now building my first rig and havenÂ´t decided on batteries yet I can give only a more general perspective (full disclosure: just bought motor kit from Terry). Keep in mind that the average ES poster is more of an enthusiast/tinkerer/engineer and possibly not representative of your average kit buyer (I am somewhere between).
A figure you often hear bantered about regarding EV transport is how the average US commuter commutes 29 miles a day for 55 min (avg 32 mph). This applies directly to my situation (22m roundtrip) and many others on the board, and I think that 20+ miles each way at up to 30mph are practical sane limits for most folks. More than that is a Sunday tour for fun- I donÂ´t want to battle traffic and the wind for 2hrs a day just to get to/from work. ThatÂ´s where the train or car come in.
I myself am going for a lighter rig to not feel too bogged down without assist and allow for cargo. Yesterday I met fifthmass and tried his rig (48v Clyte 408 with Clyte 40A controller 48v 20aH Ping lifepo4) which was VERY sweet but heavier than what IÂ´m shooting for at ~90 lbs. He says his range is 60-70m with a tailwind and 40-50m with hills and front winds. What more could you need?
More than 20ah LiFEPO4 would be cumbersome on the rack, complicate cargo storage, and be above the average practical needs of a commuter.
My problem is figuring out if I will regret going for LESS than 20ah at a sacrifice of range for little weight difference. Since many outfits offer 10ah LiFEPO4 kits I would think these are workable for the avg user. The new 3C cells from Ping and others are giving an exciting range of choices now, so short bursts of power donÂ´t require a heavy duty rig.
IÂ´ll be sure to post my bat decision and first experiences. Till then i am open to suggestions