Can I charge a 48 Volt battery with a 52 Volt charger?

[moohead]

My wife's battery charger (48 V) is sparking when it is plugged into her battery (the charger is NOT plugged into the wall). This is the second 48 V charger that I have purchased from Luna that exhibits this defect. So she has no charger to charge her battery.

My battery is a 52V battery and I use a 52V charger that is NOT defective. I plugged this charger into her battery without plugging into the wall. No sparking. I know it's not the battery.

Can we charge her 48V battery with a 52V charger while we are waiting for a new charger to arrive? Is it safe?

To Luna: I'd say you have a problem with the 48V barrel connector chargers you're getting from overseas. Is there a better charger available? Thanks.

Marc

[Riderofbike]

Plug the charger into the electric socket first. I know it doesn't seem right but that's the way they say to do it.

[moohead]

You are correct. I was originally told to do it the other way around. But "wall first" has worked. Thank you!

[skymon]

Whatever you do, don't use a 52v charger on anything other than 80% setting on a 48v battery. I'm sure you won't get a recommendation from anyone at Luna to use a 52v charger on a 48 v battery at all. Over charging the cells will permanently damage them. Could cause a fire even.

[moohead]

Right again. You guys are on point! Thanks.

[Ade]

https://electricbike.com/forum/forum/builds/new-builder-questions/30401-why-does-my-battery-spark-when-it-s-first-plugged-into-the-charger

I always plug my charger to the wall first and give it a few seconds to settle down before plugging in my battery. Never sparks.

[moohead]

Local e-bike shop in Charlotte NC said the same thing. Components in these chargers are not the greatest. Wall plugging first allows the lesser components to warm up. It's weird to see sparks created when nothing is plugged into a wall! Thanks.

[spinningmagnets]

80% on a 52V charger is about 4.o V X 14 = 56V

A 48V pack is 13S, so 4.2V (100%) X 13 = 54V

so NO...do NOT do this, it will damage the battery.

[moohead]

Thanks for your info. Smokey the Bear believes you saved a forest!!!

[kdlnet]

Try the Satiator chargers from Grin Technologies