2 chargers in parallel

[deffx]

Quick question before I blow shit up.
Can I parallel two identical 2amp chargers, will this give me 4 amp charging?
Seems reasonable, but I'm a bit foggy today

Thx in advance

 

[calab]

Yes you can, certain meanwells you can because they are designed to be paralleled.
A quick list of current sharing meanwells - https://www.power-supplies-australia.com.au/blog/connecting-mean-well-power-supplies-parallel
http://meanwellaustralia.com/news/using-mean-well-power-supplies-parallel

Quick question before I blow shit up.
Can I parallel two identical 2amp chargers, will this give me 4 amp charging?
Seems reasonable, but I'm a bit foggy today

Thx in advance

 

[deffx]

These are 48v "sans" brand chargers. Wish they were meanwells!
I'll hook up a parallel cable and see what happens

Tune in next episode... "How to extinguish an electrical fire"

 

[calab]

I see you are a renter.

These are 48v "sans" brand chargers. Wish they were meanwells!
I'll hook up a parallel cable and see what happens

Tune in next episode... "How to extinguish an electrical fire"

 

[john61ct]

Units should be designed for that, and procedure well documented

 

[deffx]

I see you are a renter.

:lol: :lol: :lol: :lol:

No, just an amateur pyro technician

 

[deffx]

Units should be designed for that, and procedure well documented

Screenshot_20220227-012139.jpg

Dude, I have cheap Chinese chargers. Not industrial equipment

 

[john61ct]

Use the right tool for the job

or take your chances.

 

[Eastwood]

Tune in next episode... "How to extinguish an electrical fire"

:lol:

 

[calab]

You have to be careful even when you put chargers in series, with isolating the grounds.

Some chargers come with isolated grounds.

Not charger related per se but server power supplies used to power high power rc chargers (iChargers for example) need to have isolated grounds.
I can not remember if it was all or just the first. So each psu is 12v and 24v you need 2 in series, 36v 3 in series and 48v 4 in series. It was a pretty easy mod to do, along with easy to modulate the fan speed for noise. Some people would get real fancy and solder in their own connectors or wrap their chargers in carbon fiber to make them look nice. Just do an es search for icecube57 as well as look at his liposolutions youtube channel.
https://www.youtube.com/user/icecube578/videos
http://lipoconnectionsolutions.com/

 

[john61ct]

Series is completely different issues.

Really better to get units where the vendor states they are designed for it, or experienced forum members have laid everything out, RCgroups. com is a great source on this.

The grounding needs to be removed on all but the last one.

If one fails while charging, the resulting spikes / surges can fry whatever is downstream.

Coolice sells a gadget to protect against that

https://www.rcgroups.com/forums/showthread.php?p=47847221

https://www.rcgroups.com/forums/showthread.php?p=47938947

But best of all is to buy a charge source that actually puts out the V&A you need, and automatically terminates when the pack is full.

Grin Satiator's 3 models cover a lot of ground

and Justin has stated they can be connected in parallel, and I believe also in series.

 

[dominik h]

With well designed chargers and power supplies there is no problem with paralleling them.
I use two mean ELG-240-42 in Series (set to 87,5V and adjustable 0,1-6A ) as my daily charger,
and if it has to charge my 21S100Ah faster , I plug in parallel to this

a chineses standard scooter charger with 10A and max 85,2V or
a Zivan NG 3 set to 35A and 86V or
a Zivan NG7 set to 55-85A and 85V

If you have two identically chargers , nothing will hapen to them, they do there work.
At the first charge I would have a look if both of them end there charging procedure, if so everything should be ok.

But personally, in your case I would buy a 4A charger they are cheap.

 

[999zip999]

When I tried it one charger would shut off sooner then the other. Yes with cheap 36v 2a for two 12s for 24s. Moved on. Be careful if not isolated ground.
I just upgraded to three meanwells to 83.9v 15amp for high quality cells. I did get a stator charger but at 84v it's only 4.5amp

 

[deffx]

But personally, in your case I would buy a 4A charger they are cheap.

Best advice, thx! I have ordered one.

I didn't get around to parallel them, didn't want to blow up two chargers and leave myself up the creek without a paddle.
I may try when my new one arrives.

Thx for all the replies

 

[DrkAngel]

Charger and power supply in parallel.

48V 2A dedicated charger (54.6V) and 60V power supply (trimmed to 52V (350-400w)) with directional diode on positive wire will effectively give you an 8A charger. 8A charge until near full when 2A regulated charger function , solely, takes control. Directional diode prevents any voltage feedback and charger disconnect feature remains effective.

Might need to lower 60V PS further to moderate output unless it has true amp regulation.
Most Power supplies incorporate a 120-130% surge amp regulation.

 

[ynot]

Interesting thread, just found it after I wired up 2 - 36V - 2 amp chargers with what seems to be good results, both are charging, one has a red led light & the other a green.
Reason for this post is that the diode is a great idea for me, it will lower the output voltage by about 0.75 Volts which puts it right in the range I want for my Nisan Leaf Module 5 pack (10s).

PS did not need the fire dept, the only smoke was flux burn off.