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Running 2 charges from 1 power supply

Running 2 charges from 1 power supply

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Old 03-27-2013, 08:19 AM
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Default Running 2 charges from 1 power supply

If I run two like chargers from one power supply (assuming same chargers and a 24v power supply) would the time to charge one battery from each charger simultaneously be the same as charging one battery at a time from one single charger?
My reasoning is (no electronic engineer here) that the voltage/amps/power from the power supply would be halved which seems it would take twice as long to charge 2 batteries from 2 chargers as it would one battery at a time from one single charger using the same 24v power supply. Yes, both chargers can take the full 24v.
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Old 03-27-2013, 11:40 AM
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If the power supply has enough power, yes 2 can be charged in about the same time as 1. Need details on the power supply, battery sizes, and desired charge rate to confirm.
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Old 03-27-2013, 12:00 PM
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also starting Voltage of each battery...Your overall answer is YES it would be same time as single battery as long as your PS can supply Needed amperage for both chargers..
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Old 03-27-2013, 12:25 PM
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Details: 2 iCharger 206b+ w/1100 watt 24v 56amp output.

Most batteries are 2s in the 4000mah to 6000mah range.

I have 2 batteries that are 4s 5500mah batteries.

So, will the answer vary from 2s to 4s batteries if I'm charging at 2c?

Any other details that are necessary?
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Old 03-27-2013, 12:37 PM
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No..only thing that will make 1 battery charge slightly long is it starting voltage .. if its a 1/2 volt difference then the less charged battery will take slightly long ..ie.. 7.75v/7.25v.. the 7.25 will tke a little longer..but both will finish nearly same time as charging a single battery
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Old 03-27-2013, 12:42 PM
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So, with the above scenario, I can charge 2 batteries (of similar makeup etc) from 2 chargers and one power supply in the same time I could charge one battery from one charger with the same power supply?
But, wouldn't the volts/amps/watts from the power supply be divided equally between the two chargers taking twice as long as charging one battery from one charger? (see, I'm really stoopid)
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Old 03-27-2013, 01:13 PM
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Yes, the 2 will charge in about the same time as 1. (of course some variation same as charging each separately as mentioned)

The volts won't be split. The watts and amps will be. But the 1100watts of the power supply leaves enough to split. If memory serves the 206B is a 300 watt maximum charger. Allowing for some power for the chargers themselves (charger efficiency) they might use perhaps 350 watts or so maximum. Thus the 2 chargers can only use 700 watts or so of the 1100 watt power supply.

And you are not even using full charger power with the batteries and charge rates mentioned. Less than 500 watts will be used from the power supply when charging two 4S at 11 amps each.

You will be fine, the power supply will have plenty left over.
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Old 03-27-2013, 01:19 PM
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Thanks for all the replies.......... now, what IF, I was using 2 iCharger 306B chargers which are 1000w @30amps using the same 24v power supply @ 1100watts 56 amps and all the other variables (batteries) staying the same. Would that matter?
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Old 03-27-2013, 01:32 PM
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No significant difference with the same batteries and charge rates.

It would be close if you charged two 4S lipos at 30 amps each. Or charged 6S at high rates, then the supply wouldn't be enough.
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Old 03-27-2013, 01:33 PM
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Depends on charge rate. If you over amp the ps, youll pop the breaker.
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Old 03-27-2013, 02:19 PM
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Originally Posted by Hoese37 View Post
Depends on charge rate. If you over amp the ps, youll pop the breaker.
Do you mean if I were trying to charge 2 batteries at 30amps each with a power supply that has 56amp continuous, it would trip my breaker? (house, not charger)
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