It is still not 100% clear to me how can a bike with a kit be 100% compliant with European regulations.
EN 15194 requires (among other things):
- 25km/h max speed
- 250W max nominal power
There are several ways to cope with these regulations:
a. The first way would be to limit max speed mechanically (and also max nominal power mechanically, through a 250W Euro compliant label). According to the approximate formula: max speed = 25km/h * (wheel diameter / 26'') * (battery voltage / 36V) * (rpm of the motor / 201) * 1.1 factor (?), a 26'' bike, with a 201rpm motor and a 36V battery will have its max speed around 25km/h
b. Most "legal" configurations do not satisfy (a), i.e. the "legal" bike is capable of more than 25km/h max speed (eg a 270rpm motor, such as the "legal" 250W BPM CST). Then:
b.I. Some controllers have a max speed regulator, such as the KU63
b.II. Some controllers with a LCD can limit the max speed with the settings (but supposedly the motor should be 250W nominal max power compliant)
b.III. Cycle Analyst allows different modes. One could set a mode being "Eco Legal", with say 36V 15A (540W, but I believe that due to losses and all that, this config is considered as legal) and 25km/h max speed. There could be other modes to be run only outside open roads. Under this option, the motor would not need to be 250W nominal max power compliant
b.IV. Dongles, for I believe at least Bosch: the bike is "legal", but it has the option to adopt a dongle that unlimits the bike
b.V. BH uses 350W motors but "restricted to" 250W. I do not know what does mean, and how they perform that limitation, if either directly to the motor (unlikely) or through current limitations on controller / battery
I am quite sure that the prevalent interpretation of the law is NOT 1.a., which would be the really legally compliant. As a consequence, it seems there is the prevalent idea one "can do things" while respecting the law.
I do not even know what most reputable e-bike sellers / producers in Europe / UK do. I believe, but I am not 100% certain, that b.I, b.II and b.V are considered as "legal".
It seems b.III. would not be considered as "legal", but why not? If one is breaking the law with the 25km/h speed, and one is allowed to restrict max speed via an LCD, why not doing the same with the power? Of course, one should stop the bike to change the settings, either way. My main point here is that despite the fact most people focus on "Euro compliant motors", I believe EN 15194 is about "Euro compliant e-bikes" not motors. So, despite having a more than 250W nominal motor, if the bike itself is limited to 250W nominal, it should be legal (is this the way BH uses b.V?). So, a CA limited bike with a powerful motor should be legal ... if the issue of changing settings is allowed, since I believe to remember there was a "by construction" statement or similar. But wahat is "by construction"? Mechanical hard wiring? electronic settings? electronic settings inside a case not to be manipulated by a biker while biking?
May I ask opinions?
EN 15194 requires (among other things):
- 25km/h max speed
- 250W max nominal power
There are several ways to cope with these regulations:
a. The first way would be to limit max speed mechanically (and also max nominal power mechanically, through a 250W Euro compliant label). According to the approximate formula: max speed = 25km/h * (wheel diameter / 26'') * (battery voltage / 36V) * (rpm of the motor / 201) * 1.1 factor (?), a 26'' bike, with a 201rpm motor and a 36V battery will have its max speed around 25km/h
b. Most "legal" configurations do not satisfy (a), i.e. the "legal" bike is capable of more than 25km/h max speed (eg a 270rpm motor, such as the "legal" 250W BPM CST). Then:
b.I. Some controllers have a max speed regulator, such as the KU63
b.II. Some controllers with a LCD can limit the max speed with the settings (but supposedly the motor should be 250W nominal max power compliant)
b.III. Cycle Analyst allows different modes. One could set a mode being "Eco Legal", with say 36V 15A (540W, but I believe that due to losses and all that, this config is considered as legal) and 25km/h max speed. There could be other modes to be run only outside open roads. Under this option, the motor would not need to be 250W nominal max power compliant
b.IV. Dongles, for I believe at least Bosch: the bike is "legal", but it has the option to adopt a dongle that unlimits the bike
b.V. BH uses 350W motors but "restricted to" 250W. I do not know what does mean, and how they perform that limitation, if either directly to the motor (unlikely) or through current limitations on controller / battery
I am quite sure that the prevalent interpretation of the law is NOT 1.a., which would be the really legally compliant. As a consequence, it seems there is the prevalent idea one "can do things" while respecting the law.
I do not even know what most reputable e-bike sellers / producers in Europe / UK do. I believe, but I am not 100% certain, that b.I, b.II and b.V are considered as "legal".
It seems b.III. would not be considered as "legal", but why not? If one is breaking the law with the 25km/h speed, and one is allowed to restrict max speed via an LCD, why not doing the same with the power? Of course, one should stop the bike to change the settings, either way. My main point here is that despite the fact most people focus on "Euro compliant motors", I believe EN 15194 is about "Euro compliant e-bikes" not motors. So, despite having a more than 250W nominal motor, if the bike itself is limited to 250W nominal, it should be legal (is this the way BH uses b.V?). So, a CA limited bike with a powerful motor should be legal ... if the issue of changing settings is allowed, since I believe to remember there was a "by construction" statement or similar. But wahat is "by construction"? Mechanical hard wiring? electronic settings? electronic settings inside a case not to be manipulated by a biker while biking?
May I ask opinions?
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