Recent content by Bor_Ed

Hi all. I don't know if this is the correct thread so administrators can move this to better if needed... I built a bike with 15 fet (48-84V 45A irf4410), 4 x 6S 16Ah lipo cells, greentime 24s BMS and 9c 2907 motor. Test run was ok on around 3km round trip and I was quite happy with the...

I've got ditch witch rim at the rear, supposed to be good enough for off-roading and wide enough to get 2.125" tires I've used. One setup I haven't tried yet is foss tubes at the rear but they have mixed results on biker forums from the seals getting broken. 3 flats in a week is pretty easy, had...

The original question was mostly for durability, loadability and puncture resistance, you are right on that. It's weird that front tire is common bike tire and can cope easily 10000km+ without need to replace it but even at low torque/low power setup the rear tire and tube wears out and gives...

Motorcycle tires have way too much rolling resistance on 26" class, I can live with it on 14" motocross tire on recumbent but on the mtb I really want to be able to pedal with as little as possible effort too when the battery cuts out. I crawled through the motorcycle/bicycle comparasion thread...

Hola. I've tried pretty much every tyre brand and model on the ebikes (full suspension 26" with 9c 2807 clone at the rear and '500W/48V' controller, max speed with pedaling around 55kph and lwb recumbent with 14" motocross tyre at the rear, 500-2400W controller/48V (depending on the mood) and...

Good point. The low current is not a problem since I charge the battery currently at 6A anyway. I'm just looking for a lab power supply instead of basic charger to be able to use the same supply with RC-lipo, LiMn, LiFe and whatnot chemistries as well as with any cell number until 48V nominal.

I crawled upon on European sites for a change and found http://litrade.de/shop/Ladegeraete-Netzteile/Labornetzteil-MRGN-900-MRNG-900-0-60V-0-60A-900Watt.html Would this work well as a charger for 16S (LiFePo4)battery with BMS? Does anyone have experience of the shop or its products? Price looks...

I've noticed that current LiFe cells tend to have 'best' charge rate at 0.25C to 1.0C as highest recommended charge rate. I'd need a pack that can be charged at around 1-2kW of power from the grid to be able to charge in sane time. Do you guys have any sane and affordable cells to be used with...

The pin is 13 on TL494, OUTPUT CTRL. Sorry to hijack the thread a bit. I have the same charger but for 16S battery. Charger gives 59.1V and battery/bms is supposed to have 56.8V max. Also the current rating is a bit too high, included charger with the battery was 2A and I don't think that the...

I just ordered http://www.zenid.com/converter.htm and the thingy is still in the mail. I rather buy from 'stores' than ebay and the price wasn't that bad including shipping to Finland.

The controller is 9 continents' 9 fet controller set to 31.5V LVC. The bms board and and battery assembly parts at ev-power are on a bit expensive side compared to other retailers but isn't that bad when you get the cells from there anyway. For the speed, you really need more than 12S, 16S is...

Battery starts to loose its grunt at ~-20C (-4F) but even then you can run the setup if you take consideration to the limited output current and heavier voltage sack even at 'normal' riding. I've ridden lifepo4 battery taken from charger inside and having 20km (15mile)+ routes at letting the...

I recently managed to get a new build more or less roadworthy but there's a problem regarding rim and spokes. What rims do you guys use under heavy usage? Mine have been powercircle rims and 3mm thick spokes so far but spoke nipples get loose and rims crack way too easily. Current build has 9c...

Currently I have only educated guesses, that's true. I'll get some sort of power monitor to the finalized setup to see the real usage of the setup.

Interesting read... Need to wrap the battery with some insulation apparently and try to be light on the throttle for next months.