opinions please

Nealh

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CS and contact after purchase appear to be non existent.

1kw or 1.5kw D/D hub will be a higher wound rpm most likely 390- 470 rpm, you will most likely be disappointed with its performance as a 250/350w smaller lighter geared hub will be better in all aspects barring the 30+ speed.
At slow speed accelerating, hill climbing and general off road use it will be gutless and will only be any good above 20 mph and for faster riding on flat roads.
The battery will not last to long and will not have top cells too last, although LG or Samsung are used they will be mediocre amp rated cells of about 5 - 8a and will knackered in no time.

You will probably buy it, then when your not happy come back and ask how to improve it.
 
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Blunderbuss

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Mar 11, 2018
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Cambridge
What Nealh said about the D/D hub is so correct, I mistakenly got a 1000w for off road use (home build project) and it was very heavy and does not deliver at at the lower speeds. The smaller lighter geared hub weighs half, accelerates quicker and uses less battery. I run it with a 48V battery so it can get in the mid 20's without pedaling. The D/D would get to the mid 30's but on a mountain bike that was not a speed that felt very comfortable, and off road you are unlikely to get anywhere near that.
 

Nealh

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We don't know the controller amps used but guess it is 25a ish. Ideally for better torque from these heavy hubs you need a higher amp rated controller so 35 or 40a, then you need a top spec battery which uses 20a rated cells like 3000mah HG2 or VTC6A which don't come cheap. Then you need to think of the range you want to cover and whether 12ah would be enough or the need for two packs.
As mentioned speed isn't cheap but a sub <500w hub at 13s/48v can get you to mid 20's with a decent battery with decent cells. Decent cells mean HG2 , VTC6, 30Q, MJ1 or GA's for 3000mah or more, 2500mah cells use HE2 or 25R green jackets.
 
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Nealh

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For off road use crank drive kits, BBS02 48V or GSM with ext controller run at 48v both with 30Q battery from Eclipse.
 

RobF

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Sep 22, 2012
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David Grant

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We don't know the controller amps used but guess it is 25a ish. Ideally for better torque from these heavy hubs you need a higher amp rated controller so 35 or 40a, then you need a top spec battery which uses 20a rated cells like 3000mah HG2 or VTC6A which don't come cheap. Then you need to think of the range you want to cover and whether 12ah would be enough or the need for two packs.
As mentioned speed isn't cheap but a sub <500w hub at 13s/48v can get you to mid 20's with a decent battery with decent cells. Decent cells mean HG2 , VTC6, 30Q, MJ1 or GA's for 3000mah or more, 2500mah cells use HE2 or 25R green jackets.


lol your last paragraph is a nightmare to a layman
 
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soundwave

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David Grant

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Nealh

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Aug 7, 2014
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lol your last paragraph is a nightmare to a layman
LG HG2 & Sony VTC6A both excellent highly rated top cells which can each handle a 20a load. Though to have a battery with these cells you have to make your own or get Jimmy at BGA/Insat to build it for you.

The nearest you can buy ready made in the UK is with the Samsung 30Q another very good highly rated cell rated for 15a load and can handle 20a for short spells.
Most 48v batteries will have 4 cells in parallel so a 30Q one is capable of having 60 - 80a load applied, most controllers for geared hubs are 15 - 20a max rating so a 30Q won't break a sweat and should last a good few years. The other advantage is voltage doesn't sag as much so can maintain a higher level of performance.
 
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tommie

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Mar 13, 2013
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For off road use crank drive kits, BBS02 48V or GSM with ext controller run at 48v both with 30Q battery from Eclipse.
That gets near to what you need,

personally i`d go the extra mile and get the BBSHD from https://www.aliexpress.com/store/product/8fun-bafang-48V1000W-electric-bike-kit-for-fat-electric-bike/705369_32484856225.html?spm=2114.12010615.0.0.9d3da095mvTi97

along with a 52v 17aH Battery from Jimmy at Insat International , Unit 1A , Gateway Mews , Bounds Green , London , N11 2UT Tel : 0208 361 1790 https://ebikebatteries.co.uk/

Both genuine companies with good customer service.
 
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D

Deleted member 4366

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If I were buying one, I'd go with Em3ev.com. They helped Bafang develop that motor. You can be sure that their stuff is properly prepared and set up for 52v. I was impressed by the quality when I bought mine. Every last lead and connector is well thought out. They're probably the longest established supplier of those motors too.
 
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danielrlee

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May 27, 2012
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torquetech.co.uk
If I were buying one, I'd go with Em3ev.com. They helped Bafang develop that motor. You can be sure that their stuff is properly prepared and set up for 52v. I was impressed by the quality when I bought mine. Every last lead and connector is well thought out. They're probably the longest established supplier of those motors too.
I've been waiting to pull the trigger on this exact same purchase, but I'm currently put off by the throttle/PAS override bug affecting BBSXX motors with more recent firmware (details below):

https://endless-sphere.com/forums/viewtopic.php?f=28&t=91306

Do you know if EM3EV's current stock suffers from the issue?
 
D

Deleted member 4366

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Do you know if EM3EV's current stock suffers from the issue?
No, I don't know. I bought mine about 18 months ago, and it was fine.

In theory, you could solve it with a logic device that allows the PAS signal to pass through as long as there's no throttle signal.
 
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