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  1. P

    1500W 48V Ebay kit, Advice for noob.

    Quick update, I've finally got to balance the pack and take it for a run. 73kph. Still on off road tires so I'm guessing there's more in it. 20s 4p sony vtc5. 4.18v per cell down to 3.85v after 6.9km with average speed of 40kph peak speed of 73kph! Have my bulk charger running at just over 10A...
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    1500W 48V Ebay kit, Advice for noob.

    Just took the bike for its first run with only 73 volts (storage charge) I hit 60kph! super happy with that. I'll have to do some more runs soon. Have to balance the pack and charge it fully then I'll be excited to see what I can get out of it.
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    1500W 48V Ebay kit, Advice for noob.

    So looking at a controller upgrade, When you see a controller with advertised normal voltage, say 72 volts is this assuming 3.7v per cell ? So say 72/3.7 = 19.45 would this be good for a 20S pack? Say 4.2v x 20 = 84 volts when hot off the charger? looking at this...
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    1500W 48V Ebay kit, Advice for noob.

    My kit got here today, all looks ok to my untrained eye. Spokes look a little loose. Other than that I haven't touched the wheel. I opened the controller it's using an infineon xc836. Looks similar to some of the old infineon stuff here, I think I can see where the processor samples the pack...
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    1500W 48V Ebay kit, Advice for noob.

    What out runners are you using? I see they do have very high continuous power ratings. I guess it's the high temperature windings (one I looked at was 300deg c) and the fact the ends of the motor are like fans to pull air through it. I have a cnc machine and could make the required mounts for...
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    1500W 48V Ebay kit, Advice for noob.

    I disagree more amps into a slower wind isn't going to help with top speed unless you sit on the current limit all the way to Max speed, voltage is what makes speed. I'll give it a go, with the eBay kit, I'll have to see what I can get out of the controller, maybe add a higher voltage controler...
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    1500W 48V Ebay kit, Advice for noob.

    As I said in the first post, from power tool batteries. 15s 4p 18650s. Giving about 60v 10ah. I'd say it'll be good for a 10c discharge at least 5c which is all I need. Going to remove the bms as I don't think it does anything with out the tools or charger. Thinking of building a 15s balance...
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    1500W 48V Ebay kit, Advice for noob.

    Thanks guys but I'm sorted for a battery that's the reason I'm building it. Can't wait to get it ordered. I've got some good ideas for the battery box and controller mounting, I'm going to make a plastic box that clamps around the top tube and hangs under it running the full length so all the...
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    1500W 48V Ebay kit, Advice for noob.

    Thanks heaps for that. Just saved me 300 dollars I don't normally bother with eBay.au as the prices are normally inflated. But I guess this seller must be importing in bulk and saving on shipping and passing that on to his customers. WIN! well I'll have to wait till I'm home to order but at...
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    1500W 48V Ebay kit, Advice for noob.

    What frame do you put it on though? What would the diameter of it be similar to once it's got a tire on it? Why fat? Better strength, less rolling resistance and looks? I'm kinda thinking a clean look appeals more to me.
  11. P

    1500W 48V Ebay kit, Advice for noob.

    That's in America and doesn't ship. Like I said we have to pay a lot to get things here. Plus it's 20inch fat wheel
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    1500W 48V Ebay kit, Advice for noob.

    Hi I'm in Australia so I'm pretty used to paying the same for shipping as the product costs. So the 1500w kits are the same motor is that what you are saying? I'm happy doing mods to the controller. I'll just get a 1000w maybe. But for the time it might be easier just to get the big one. Power...
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    1500W 48V Ebay kit, Advice for noob.

    Hi, first post here. I've been planning an E motorbike build for a while but can't decide on a battery. But in the mean time I have come across a 15s 10Ah Li ion made of power tool packs. So I was thinking of building an ebike with a ebay kit for the trip to work. something like this...
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