Bosch 6A charger

S

Spicy Legato

Active Member
Region
USA
I live in the USA. I ordered a Bosch 6 amp charger from Deutschland. As expected, it requires a 220-240 volt input. It's an easy solution to use a step up transformer. However, it makes taking the 6A charger on the road impractical. The 6 amp charger is only slightly bigger than the 4 amp. However, the step up transformer weighs as much as the charger, so it's just too heavy to use for bike touring. I really wish Bosch would release the 6 amp charger in the USA. It would make charging while touring much quicker, and more practical.
 
The lower the Amps of the charger the better chances the battery will last. I like 2Amps chargers. It is one reason I prefer smaller batteries. You can charge two in 1/2 the time of one large battery by using two chargers. Or take one battery for 95% of rides and cut total battery weight by 1/2 to improve efficiency and handling. Show photos, take temp with a color strip and report back on what you find.
 
PedalUma said:
The lower the Amps of the charger the better chances the battery will last. I like 2Amps chargers. It is one reason I prefer smaller batteries. You can charge two in 1/2 the time of one large battery by using two chargers. Or take one battery for 95% of rides and cut total battery weight by 1/2 to improve efficiency and handling. Show photos, take temp with a color strip and report back on what you find.
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It would be nice if Bosch made a 12 amp charger, which would still be less than a 1C charging rate for a 500 watt hour battery. There are many batteries that charge at 10C, without any adverse effect on life span. Higher powered chargers are generally bulkier, heavier, and most important, more expensive for manufactures like Bosch to produce.

In order for ebikes to truly become practical, we need to be able to fully charge a 500 watt hour batter in under 30 minutes. That would require about a 1200 watt charger. Grin cycles makes a really great 10 amp charger, called the satiator. Unfortunately, due to Bosch's proprietary system, the satiator cannot be used.
 
Spicy Legato said:
It would be nice if Bosch made a 12 amp charger, which would still be less than a 1C charging rate for a 500 watt hour battery. There are many batteries that charge at 10C, without any adverse effect on life span. Higher powered chargers are generally bulkier, heavier, and most important, more expensive for manufactures like Bosch to produce.

In order for ebikes to truly become practical, we need to be able to fully charge a 500 watt hour batter in under 30 minutes. That would require about a 1200 watt charger. Grin cycles makes a really great 10 amp charger, called the satiator. Unfortunately, due to Bosch's proprietary system, the satiator cannot be used.
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True, all of that!
 
McCorby said:
Charging a battery at 10C versus 1C will definitely negatively impact battery life over time. The article linked below actually notes one battery manufacturer recommending .7C.

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Toshiba has a cell that can charge at 20C for 18,000 cycles. There is usually a trade off between ultra fast charging and power density. The point is, all major ebike manufacturers should release 1C chargers, at a minimum. 1C charging will have absolutely no effect on cell longevity.
 
Anyone that knows Grin and Justin Elmore understands he'd never suggest using a product that would damage a customers battery. He's answering a market demand.
 

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man thats a old bosch battery. No way I would take the chance. your not going to save a huge amount of time and its just not worth taking a chance on.
 
fooferdoggie said:
man thats a old bosch battery. No way I would take the chance. your not going to save a huge amount of time and its just not worth taking a chance on.
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So don't. I get that.
No one is trying to change your mind or convince you. But that doesn't make you right. FOR ME the Satiator works. Multiple batteries and voltages with a single charger. Obviously you don't know Grin very well.
 
tomjasz said:
So don't. I get that.
No one is trying to change your mind or convince you. But that doesn't make you right. FOR ME the Satiator works. Multiple batteries and voltages with a single charger. Obviously you don't know Grin very well.
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and more of a chance to get something wrong if your distracted. but hey its your battery not sure what your actually saving really. but if you to have your battery updated or put on a computer it may be recording a non standard charger and void the warranty.
 
So you and “Richard” Mikes are now eBike engineers. Whatever. You’re clueless but you still fear what you lack in experience. Your loss. Al’s right.
 
tomjasz said:
So you and “Richard” Mikes are now eBike engineers. Whatever. You’re clueless but you still fear what you lack in experience. Your loss. Al’s right.
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you are? I have used expensive chargers for rc stuff. but the thing is whats the point what do you really get out of it? do you know if it will void the warranty? bosch batteries tend to be the longest lasting bike batteries out there so I doubt there is any real benefit.
 
It is the kind of a guy who runs around with a voltmeter to determine the battery state of charge to teach owners of quality gear to use something he strongly believes in. Once Tom buys a Specialized or a Bosch e-bike, he is free to grill... Grin it :D
 
The Grin charger has its own display for voltage. No need for a straw man... but then again if all you know how to do is write a check and pedal, then by all means do as you're told and buy the matching label. Otherwise you might hurt yourself.

What I would certainly not do is use a 6a charger on any battery except in rare circumstances. I'm a lot happier at 0.50a. 1a is fast for me but my adjustable chargers are adjustable specifically so I can tailor the charge to my time available.

Grin Tech is a major name brand, for those who don't know. That charger's internal mechanism is better than anything you are going to get from Bosch... OR its the same thing, as CC+CV mode charging that is fanless and fault tolerant with internals rated to hundreds of thousands of hours MTBF... does Bosch do that? If they do its because both Bosch and Grin use the same mechanism of action... which is effectively an LED power supply with a front end GUI (and in Bosch's case, some nanny software to enforce customer loyalty or else).

Thats what is inside the box, if the 'manufacturer' is using the best equipment available for the job.
fooferdoggie said:
bosch batteries tend to be the longest lasting bike batteries out there so I doubt there is any real benefit.
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Well, cells are cells so a pack made with quality, name-brand LI-NMC 18650's or 21700's will be at least as long-lived if it is treated right. I have a Samsung 25R pack that is well over 2500 cycles with no sign of degradation. So far over in fact I stopped counting. If you do things like charge it to 100% and let it sit like that for a month, or drain it down to zero and then blast 6a into it and let it sit at 100% for a month... that pack is going to degrade faster than one treated with more care. Does not matter whose brand is on the plastic case.
 
m@Robertson said:
The Grin charger has its own display for voltage. No need for a straw man... but then again if all you know how to do is write a check and pedal, then by all means do as you're told and buy the matching label. Otherwise you might hurt yourself.
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well since my bike came with the charger its kind of a moot point. I used to like to screw around with things but now I just want to ride. I just want them to work and get tired of messing with things. I do that enough at work. fixing the mecanicals on my bike is as far as I want to go on electrical issues. well wiring in lights I guess.
 
fooferdoggie said:
well since my bike came with the charger its kind of a moot point. I used to like to screw around with things but now I just want to ride. I just want them to work and get tired of messing with things. I do that enough at work. fixing the mecanicals on my bike is as far as I want to go on electrical issues. well wiring in lights I guess.
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I try not to diss things I know nothing about. Emotive responses aren’t productive.
 
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