I’m looking into buying a charger with adjustable voltage from 36V to 42V from China.
Here are the specs:
Adjustable voltage 36V-42V (10S) or 43.2V to 50.4V (12S) with external knob
Current: 5A+/- 10% error
Plastic enclosure and fan.
5.5mm dc plug (other options available)
Size: 16cm x 8.5cm x 5.6cm
Over current, over voltage short circuit and reversed connection protection.
Dual LED indicator (red=charging, green=fully charged or no load)
Price: $30 for 10S version, $37 for 12S version.
You can do a storage charge without disconnecting the bms. Just turn the charger off before the batteries are fully charged. I don’t think it’s necessary to balance them for storage if you charge the pack to 36v for Li-ions
Although, if you can get a custom 5-10a 42v charger for under $40, That’s a good deal.
My 42v 5a charger from battery supports cost $53 plus $30 shipping
I would have to be constantly looking and paying attention to voltage while charging in order to stop it at the right time. With this, I only have to set it and forget about it. I can disconnect it a few hours later knowing the pack won’t go over storage. This would be great as my gf is not the most attentive person lol (Build is for her).
Yikes! That’s expensive! I think I paid $45 for my 42V 5A charger including shipping.
I’m also looking for a similar charger (4amp +) with a 41/42v cut off. Seems there are a fair few of us looking. Even if a group buy doesn’t come out of this it would be good to share links to what we find. I really liked the look of the one White Pony used (Modiary) but they no longer sell single units and MOQ on Ali is 50!
@PXSS I’d be interested; I want a charger that I can adjust to 41V, just to elongate cells lifespan and to avoid hitting the overcharge threshold due to regen (as unlikely as that is). I’d even settle for a 2A version that is adjustable.
I just bought an mean well charger which is often used by the people on the ebike forums. I got it for 25€ incl. postage in Germany. Its the CLG-150-48V model which can be adjusted from approx. 38-58V. You can also adjust the current.
Just realised that this wouldn’t be suitable for me as I don’t have a BMS and the over current protection it too high to act as a cut off. I have fitted a balance plug during my battery build so maybe I bite the bullet and add a BMS!?
Nothing simpler than plug in charger and place knob on full charge an hour before a ride and after the ride place knob back on storage for an hour. Battery always remains healthy and you dont have to fuss with any other chargers etc.