Fast charger?

[DWATSON]

Has anyone used a fast charger on their lectric xp yet an if with what results good bad an the ugly?

 

[harryS]

The ugly is you can melt the charger jack on the bike or battery. That's going to depend on the quality of what they used. The typical 5mm barrel is safe for about 4A, so they typically use 2A chargers. I was once going to buy a 5A model like what Timpo showed, but I settled for 3A.

 

[m@Robertson]

I've always heard that 3a is as far as you want to go with a barrel connector. Either way... fast chargers are for batteries with an XT60 connector to the charge port.

 

[mclewis1]

I've always heard that 3a is as far as you want to go with a barrel connector. Either way... fast chargers are for batteries with an XT60 connector to the charge port.

or XLR, or "mini XLR", or ST3, or ...

Plus I believe that another characteristic of the battery (aside from the robustness of the charger connector) that needs to be considered when thinking about faster charging rates is the particular BMS used.

 

[fauconnier]

Also, your BMS, battery management system, won't accept it . The over-current protection should protect the circuit.

 

[mclewis1]

I believe typical BMS has 5A limit for charging.

But it depends on what you define as "typical". I have a 52v 14.5 amp/hr battery from Grin that like some others in their portfolio can be charged at up to 8 amps.

 

[harryS]

Bad picture of the jack for the popular Hailong-2 battery. It's mounted in a plastic bezel. Can't take much heat at all.

I'll grant you that the XLR and XT60, etc are the way to go if you're going to do 5A.,

 

[fauconnier]

Everything I have read on this thread is true and verifiable, but I would not trust a BMS with a 2A charging jack, for more than 2A or 3A. I can't imagine they build a BMS with 5A in mind and at the finish they all decide to put a 2A charging jack ! to save 2 cents ? I think that the true charging capacity is probably close to the jack limit. ¯\_(ツ)_/¯

 

[mclewis1]

Everything I have read on this thread is true and verifiable, but I would not trust a BMS with a 2A charging jack, for more than 2A or 3A. I can't imagine they build a BMS with 5A in mind and at the finish they all decide to put a 2A charging jack ! to save 2 cents ? I think that the true charging capacity is probably close to the jack limit. ¯\_(ツ)_/¯

That's "probably" true, but it's so hard to get good verifiable specifications on items like the BMS that we're left with more anecdotal experiences and the manufacturers overall ratings which are usually very conservative for monetary and legal reasons.