Charlypitillo
New Member
They are going to release it for both types of frames
SZZS specific CEF50-main thread (initial builds and troubleshooting related only)
- Thread starter TCFlowClyde
- Start date
Charlypitillo
New Member
frame weight48v? frame size?
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Charlypitillo
New Member
480wh autonomies in 48v?
Yozha
Member
What engine firmware did you install to increase power?
TCFlowClyde
Active member
- Thread starter
- #4,805
None. I'm hoping Bafang will do a firmware update for the M820. Max is still 75 Nm.
When Bafang first launched the lightweight motor a few years ago, they advertised as 75Nm max torque, but also had a mysterious short superboost mode...a few us here in jest just picked 85Nm as a theoretical max, in part to be categorized as a small, lightweight, truly 85Nm full power motor.
My desire was that someone at Bafang was listening (maybe reading this thread) and would put out a firmware update to compete with updates from Brose, Bosch, and Shimano, who are in turn dialing up their torque to compete with the DJI-Anivox 120Nm.
But I think Bafang has so much else going on with their other motors, such a firmware update is unlikely. Bafang seems fairly insulated from consumer feedback directly.
Bottom line: there is NO superboost 85Nm power mode firmware update planned that I'm aware of.
C'mon Bafang, give us an 85Nm superboost upgrade!
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Looking at the extend battery connector it is 4 pins, my cef50 is a simple 2 way female connector.
Charlypitillo
New Member
Weight of the size 15 frame and weight of the frame with a 700Wh and 480Wh battery. I'm currently unsure which battery to order. There's a difference of 1280 grams.
Those of you who have the 480Wh 48V battery, what range are you getting? I have to make a decision.
Those of you who have the 480Wh 48V battery, what range are you getting? I have to make a decision.
TCFlowClyde
Active member
- Thread starter
- #4,808
Rider weight Terrain normally ridden (big mountains v. rolling hills v. flat and hard packed v. loose) Peak torque is higher at 75Nm on the M820, so of course the higher power modes use more juice quicker. Peeps kind of figure higher power modes will rarely be used in the begining, but the CEF50 is kind of addictive, even in controlled bursts. Its way more agile over the heavier, true full powered rigs. Also, it's fun to charge like the lighter analog in the twisty singletrack. And few really enjoy a crawl up a boring, tough fireroad. So, you'll likely burn more than you realize even on a generic trail. All good reasons! IMHO
A smaller 480Wh battery for almost a full powered bike is very doable if your light, riding flatter, groomed more XC trails, and gravel roads, probably running thinner and faster tires, Lastly, If peak torque was 50-60Nm, the smaller battery makes more sense and is more efficient.
You could also build an battery extender connection. This gives options.
For what it's worth...
i
i'm old (64), heavy (100 kg), i doing 30 km 1500 D+ with the 480 and i keep +- 30% of the 480w. initially i have purchased the 700 and i have change it because i never consumed more than 40 %. But i use very lower the boost mode.
Charlypitillo
New Member
Hello, I weigh 72 kg and I am in shape since I practice MTB and lung cycling, my terrain is XC marathon, some hard climbs but 80% compact terrain (I was thinking of mounting up to a 130 or 140 mm Fox 34 since I am not going to get the most out of the 160 which is the one I have bought) 2.35 barzo and mezcal XC UCI tires, I have bought all the components and weighed them and with the 480wh battery it weighs 16077g and with the 700wh 17353g it will always be a little more or less than those weights, Jean is investigating bringing to market an extender that goes in the 280wh frame and weighs 1163g, I put a photo, I have to decide on one of the two batteries so that you can send me the frame, motor and battery kit, let's see if more people put their autonomy with the batteries 480wh 48v
Peeps kind of figure higher power modes will rarely be used in the begining, but the CEF50 is kind of addictive, even in controlled bursts. Its way more agile over the heavier, true full powered rigs. Also, it's fun to charge like the lighter analog in the twisty singletrack. And few really enjoy a crawl up a boring, tough fireroad. So, you'll likely burn more than you realize even on a generic trail. All good reasons! IMHO�
A smaller 480Wh battery for almost a full powered bike is very doable if your light, riding flatter, groomed more XC trails, and gravel roads, probably running thinner and faster tires, Lastly, If peak torque was 50-60Nm, the smaller battery makes more sense and is more efficient.
You could also build an battery extender connection. This gives options.
For what it's worth...�
TCFlowClyde
Active member
- Thread starter
- #4,811
Oops! A big one that is forgotten is reserve battery cut off on all M820 CEF50 batteries is 20%. This is unusually high set by Bafang. (My Bafang M600 is also 20% but my other e-mtb is the Bafang M620 at 12% but it's a custom battery/BMS) where it kicks higher power modes down to eco power mode. Eco mode on the M820, like the walk mode is weak. Good thing the CEF50 is lighter but walk mode does serve to assist standing gear-change mode., so it's not useless. One of the only few complaints.
Peeps kind of figure higher power modes will rarely be used in the begining, but the CEF50 is kind of addictive, even in controlled bursts. Its way more agile over the heavier, true full powered rigs. Also, it's fun to charge like the lighter analog in the twisty singletrack. And few really enjoy a crawl up a boring, tough fireroad. So, you'll likely burn more than you realize even on a generic trail. All good reasons! IMHO
A smaller 480Wh battery for almost a full powered bike is very doable if your light, riding flatter, groomed more XC trails, and gravel roads, probably running thinner and faster tires, Lastly, If peak torque was 50-60Nm, the smaller battery makes more sense and is more efficient.
You could also build an battery extender connection. This gives options.
For what it's worth...
TCFlowClyde
Active member
- Thread starter
- #4,812
Yeah, a 280Wh battery extender would be great!,
Both are available as extender batteries. It is the 43v that is odd. The 48v will be heavier.
(not from SZZS) Third party batteries still need a new connector to handle both the charging of the internal battery and the power-in from the external battery. The charge port on the stock CEF50 is only designed for charging at 2 amps. Not enough to supply power to the motor.
(not from SZZS) Third party batteries still need a new connector to handle both the charging of the internal battery and the power-in from the external battery. The charge port on the stock CEF50 is only designed for charging at 2 amps. Not enough to supply power to the motor.
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TCFlowClyde
Active member
- Thread starter
- #4,816
Anybody in the know have more information on the SZZS specific battery extenders.
I'm wondering about cost, availability, and integration for both 36V and 48V systems.
Also, what is Jean Wang's email address again....it's been a long time since I contacted them.
Thx
I'm wondering about cost, availability, and integration for both 36V and 48V systems.
Also, what is Jean Wang's email address again....it's been a long time since I contacted them.
Thx
Jeanwang <jeanwang@szzsbike.com>
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