Bosch battery reserve and best charging protocol

retiredNH

Well-Known Member
Region
USA
There was a previous discussion on this topic, https://electricbikereview.com/forums/threads/low-battery-cutout-for-bosch-gen4.32950/ but it didn't really discuss charging or true reserve with the batteries. For example, there's much discussion elsewhere regarding how EVs don't use all the battery capacity in order to extend battery life. My question is whether Bosch does something similar, or is there an optimal charging scheme we owners can use? For example, I've heard of folks that never charge their batteries above 80%, by some sort of indication.

It seems to me that it's possible that the Bosch BMS includes such a safety buffer in order to get longer battery life, but maybe not. IOW, are the battery percentages as reported by the controller true percentages, or useful percentages, based on some battery longevity/safety reserve?

Also, how many riders have actually worn out their batteries, or noticed a significant drop in range after long use?
 

dodgeman

Active Member
Region
USA
City
Macomb, Illinois
I have a Trek Verve+3 with a Bosch Powertube 500 battery. The only thing I saw that came with the bike on charging was don’t store it long term at 100%. Don’t quote me on this but I think the literature that came with the bike said store it between 40% and 60%. Any other advice I’ve read has been on this forum.

As far as battery reserve goes I know it cuts power off to the bike but there is still juice left to run the lights.

Its nice to make the battery last as long as possible but I’d say it’s one of those things you can worry about too much.
 

Bothrops

New Member
Region
USA
Hello, I hope it's OK to post a related charging question here. I have the Bosch Powerpack 400 battery and the compact charger that came with it.
My question is what is the proper sequence in plugging in the battery to charge?

Is it better to A) plug the charger into the battery and THEN plug the charger into the wall socket OR B) plug the charger into the wall socket and then plug the charger into the battery? Does it make a difference?
Thank you in advance for your advice!
 

fooferdoggie

Well-Known Member
Hello, I hope it's OK to post a related charging question here. I have the Bosch Powerpack 400 battery and the compact charger that came with it.
My question is what is the proper sequence in plugging in the battery to charge?

Is it better to A) plug the charger into the battery and THEN plug the charger into the wall socket OR B) plug the charger into the wall socket and then plug the charger into the battery? Does it make a difference?
Thank you in advance for your advice!
no its not like those cheap setups where you get sparks. I do both its not a issue.
 

dodgeman

Active Member
Region
USA
City
Macomb, Illinois
I plug into the wall first. I have got a couple of sparking sounds doing the battery first and then the wall but it never did hurt anything.
 

fooferdoggie

Well-Known Member
I have mine on a smart plug. so I set it to turn on at a certain time and off after 3 hours. that way the battery reaches house temperature before the charge stops. no use having the charger powered most of the time.