Search found 4 matches

by CyberNate
Nov 09 2019 2:06am
Forum: E-Bike Non-hub Motor Drives
Topic: My Bafang Ultra Mountain Bike! NEW FREY EX and FREY CC
Replies: 50
Views: 8067

Re: My Bafang Ultra Mountain Bike! NEW FREY EX and FREY CC

I always thought parallel connecting two different batteries is a bad idea but if they only get physically connected when the voltages are equal I guess it it should be do-able. Although their discharge curves will not be the same either. Well, let us know how it goes if you decide to give it a go....
by CyberNate
Nov 08 2019 10:40am
Forum: E-Bike Non-hub Motor Drives
Topic: My Bafang Ultra Mountain Bike! NEW FREY EX and FREY CC
Replies: 50
Views: 8067

Re: My Bafang Ultra Mountain Bike! NEW FREY EX and FREY CC

Both batteries together is not an issue. The issue is that the 52v battery BMS cut off will eventually get hit, which is lower than you should take the voltage for longevity. You could simply switch off the external once voltage gets down to around 45v.
by CyberNate
Nov 07 2019 1:55pm
Forum: E-Bike Non-hub Motor Drives
Topic: My Bafang Ultra Mountain Bike! NEW FREY EX and FREY CC
Replies: 50
Views: 8067

Re: My Bafang Ultra Mountain Bike! NEW FREY EX and FREY CC

Here is the battery information from Ivy at Frey: IVY wrote: EX Max battery 48V14Ah inner+48V14Ah outer. CC Max battery 48V17.5Ah. both do not apply for 52V. Here is how the EX handles two batteries with auto-sensing of voltage: IVY wrote: About EX battery how they work I answer you below: if 2 bat...
by CyberNate
Apr 03 2018 6:01pm
Forum: E-Bike Non-hub Motor Drives
Topic: My Bafang Ultra Mountain Bike! Frey AM1000
Replies: 1862
Views: 228692

Re: My Bafang Ultra Mountain Bike! Frey AM1000

I'd like to have the AM1000 fat bike version without the motor. Slap the Luna Cycles Ludicrous 2500W Ultra in there. Now that would be the perfect bike! Power for fast commute and yet can hit the mountain bike trails.