Bosch 500Wh range

[shamrock]

I'm really confused with my two bikes. Both have the Bosch Performance line CX, both have the 500Wh battery. The other one is the Canyon Precede:ON CF 8 which I mostly use in the summer, but have used it also in wintert conditions. It has the Bosch eBike system 2. The other one is a Crescent Elgar 30B with Bosch Smart System. Being an aluminium frame, full suspension and 29.5" tires I understand that it is bit heavier. But the actual range differenece between these two bikes is something that cannot be understood. With the Canyon in eMtb mode, in winter conditions, I have no problem getting to work and back, around 45km. Sometimes even two days in a row, so it actually gives more than 100km of range with my driving style. Tires in winter on both bikes are the same, Schwalbe Ice Spiker Pro.

The Crescent however is a completely different story. There's no chance to make it last even 50km. On my last drive, I really tried to push. It was 22,4 km, my average speed was 24.1 km/h and the average power provided by me was 130W. It drained 49% of the battery. On one good slightly downhill straight, I kept my speed over 26km/h for over 5 kilometres, and even on that part I lost 5% of the battery. The ride took 55 minutes, I have a 500Wh battery and a 250W motor, limited to 25 km/h, so technically this just should not happen. It would mean that the motor is running full power all the time, and it certainly isn't.

So ... same parts, but with the other bike the range is pretty much half of what I get with the other one. Do I have a faulty battery? Do I have a faulty software? Should I try to ride it as empty as possible, to "learn" the battery? I can't do it now when I commute to work, I have the keep the charger with me and charge it at work, so I haven't have time to test it beyond.

 

[irie]

On one good slightly downhill straight, I kept my speed over 26km/h for over 5 kilometres, and even on that part I lost 5% of the battery.

That certainly sounds wrong, but the software might be lying to you ...

 

[whitymon]

I am not sure I understand the comparison.

First bike is a city bike and you ride it from house to work, how would you try to compare it to a bike you would ride on trail? Did you do that with both bike? You mentioned DH so I guess not.

Riding in a city, assuming a usual one, everything is flat. On a trail up and down hill, so the motor absolutely do not consume the same.

This is why you will always find range with elevation.

It is not because you maintained a speed at nearly 25 that your motor did not do anything. If you pedaled, you just do not know if you had to pedal to maintain 25, if so the motor was assisting. You want to know? Do twice the DH with assistance first, second none, there you will know. Also if the battery drain by 5% with assistance to zero/disabled, you have a battery issue too.

If you ride both bike on house/work, they have the same weight, you pedal the same and there is 50% difference in remaining battery, yes you have an issue.

Anyway, we lack inputs to help you correctly, hope this above could give you some clarity.

 

[Renton_Yorkshire]

On the Crescent, is the powertube removable? Does it have SoC lights on one end which indicate whats in it when you connect to charge it?

Maybe run it until its flat and dies, and see what distance you can get out of it - to see if the software is an issue.