Hello all, I'm new to forum and ebikes. Excuse my lack of Tech knowledge. Anyhow I got a new conversion on a

[sean02ie]

Hello all, I'm new to forum and ebikes. Excuse my lack of Tech knowledge. Anyhow I got a new conversion on a reasonably light Hybrid bike. Motor Bafang HD 1000watt Battery 48volt Litium ion. controller set to Max speed 50KPH. Front Chain ring 46T Rear 7 speed 14 . 32 . Also with kit spare 44 & 42 chainrings.Slick tyres. My weight 80 K. Weight of bike pls Panniers 26 Kilos.

What I'm trying to achieve is Maximun Range flatish terrain. over 100 Kms an average speed of 18 to 25 KMS. It will be possible on tour to top up charge for one hour during Lunch stop.

Any opinions on optimum set up ( i.e. reducing max speed to 25KPH At present minimun with easy pedelling at Level 1 is 28KPH. which for touring is not necessary. or reducing Chainring to 44 ? ) would be very much appreciated.
Regard pedal assist I'm happy to pedal contineous for hours and turn of motor on downhills.

Look forward to your comments
Sean
Ireland

[COAR]

Some of the stock bafang programming I've seen starts level 1 at 30% of the total available current/assist. which means even at your lowest assist level you're sucking up a lot of electricity. you don't need 30% to ride on flat ground. With a 50lb, 2.8" tired mt bike, I can comfortably maintain 15+ mph on flat pavement with my level 3 or 4 (which is only 9 or 15% of current). And I haven't maxed out my range yet, but from test rides, I estimate I could go at least 30+ miles in the above scenario (with a 52v 8ah battery).

So I'd suggest getting a programming cable to reconfigure your controller. These are the settings I used which let you really fine tune in the amount of pedalling assist you get:

[E-HP]

Battery 48volt Litium ion.

It might be helpful if you would provide the capacity of your battery rather than just the voltage.

[spinningmagnets]

A smaller chainring would help, it reduces stress on the battery. If the fastest you ever go when passing someone is 28 MPH, then theres no need to be able to run 35-MPH. Maybe try a 36T chainring, or something close?

It wouldn't be a big improvement, but it couldn't hurt.

[sean02ie]

Battery details
output42V DC, 2.0A
MAX RECHARGABLE BATT. CAPASITY 8 - 15AH
BATT. TYPE SAN36V

thanks for comments re Gear ratio. and lower max speed in level 1. I do feel that with optimum settings and smart contineus pedal assist I should be able to achieve a 100km range on flatish roads.
regards
Sean

[E-HP]

Battery details
output42V DC, 2.0A
MAX RECHARGABLE BATT. CAPASITY 8 - 15AH
BATT. TYPE SAN36V

thanks for comments re Gear ratio. and lower max speed in level 1. I do feel that with optimum settings and smart contineus pedal assist I should be able to achieve a 100km range on flatish roads.
regards
Sean

So you stated that it's a 48V battery, but your details seem to indicated a 36V battery (fully charged 10S/36V battery would be 42V)
And a capacity of 8-15Ah doesn't make sense. If it's 8Ah, then you may struggle to get 100km; if it's 15Ah you could do it if you pedal a lot.

8Ah @ 36V would be 288Wh of energy
15A @ 36V would be 540Wh of energy

On the other hand, if the battery can only provide 2A of current, then you'd only be able to pull 72W from the battery, so something is off with the specs.

[amberwolf]

Battery details
output42V DC, 2.0A
MAX RECHARGABLE BATT. CAPASITY 8 - 15AH
BATT. TYPE SAN36V

The text above is not what is typically labelled on a *battery*, but it *is* what is usually on a *charger*.

Additionally, that information is not for a 48v charger, but is for a 36v charger. If you are using this charger on a 48v battery, then it will just about never charge it at all, as the typical LVC for a 48v battery (at least at the controller) is about 42v, which is about the full voltage of a 36v battery (and is what that charger will output).


Please attach images of the actual item the label is on, and of the label itself, so we can help you figure out which part is which, and what each items actually specifications are. If you also provide links to the pages you bought the actual items from then we can get more information directly from those pages, as well.

[sean02ie]

Hello All and thanks for your patience. Amberwolf your right regarding misleading specs. I copied these from leaflet that came with kit but now suspect it referred to a lesser Bafang.
So this is the info from the labels on my converted Bafang Kit.

Motor BBS - HD 48V 1000 W NO.1706020006
CONTROLER . BAFANG C961 ( SET FOR LEVELS 1,2,3.)
BATTERY HL DOWN TUBE TYPE .... LI - ION BATTERY 48V/14.5 AH
BATTERY CHARGER . SANS ELECTRONIC CO. MODEL SSLC109V55 INPUT AC 100 - 240 V - 2A MAX - 47 - 63 HZ
OUTPUT 54.6 V---2.0 A

CHAIN DRIVE BAFANG 46 T ( SPARES 44T AND 42T) ( 90% ON MY ROAD BIKE I RIDE A 40T)

TOTAL WEIGHT 24 KILOS ( 53 LBS)

AT PRESENT WITH EASY PEDAL ASSIST LEVEL 1. 28- 30 KPH LEVEL 2. 35 -40 KPH LEVEL 3 45 PLUS

TARGET AVERAGE OVER 100 KMS (63 MILES) FLATISH ROADS - SLICK TYRES

LOOKING FORWARD TO YOUR EXPERT OPINIONS
BEST REGARDS
SEAN O REILLY

[COAR]

So it only has 3 assist levels? In that case I think you'd definitely benefit from adding more levels with lower assist options.

The C961 looks like it supports 2-9 levels of assist. It seems easy to reconfigure the display, but I believe you actually have to reprogram the controller for it do anything. In which case you'll either need the bafang programming cable or find someone local to help. "Programming" is extremely easy, I'm confident almost anyone literate can do it.

https://www.youtube.com/watch?v=UN11he-3xyo&t=122s

https://www.amazon.com/BAFANG-Programmi ... B07JBZGDGT