Can a battery charger keep a battery charged while that battery is powering an invert

[vatooltrade]

I am using a 6 amp battery charger to charge a 70 aH marine deep cycle battery which is connected to a 750 watt inverter powering a 700 watt (6 amp) vacuum. Would the battery stay charged while it's in use?

BTW- The battery has 2 positive terminals and 2 negative terminals. The charger is connected to the larger set and the inverter is connected to the smaller.

Jon
vatooltrade@gmail.com

[Sunking]

I am using a 6 amp battery charger to charge a 70 aH marine deep cycle battery which is connected to a 750 watt inverter powering a 700 watt (6 amp) vacuum. Would the battery stay charged while it's in use?

BTW- The battery has 2 positive terminals and 2 negative terminals. The charger is connected to the larger set and the inverter is connected to the smaller.

Jon
vatooltrade@gmail.com

Not even remotely close. 700 watts @ 12 volts = 54 amps. A 70 AH battery can only deliver about 9 amps before its voltage crashes. To run 12 volt 750 watt battery inverter you need around a 500 AH flooded lead acid battery or a 250 AH AGM battery. To run it from a battery charger you would need a 60 amp charger.

[vatooltrade]

Not even remotely close. 700 watts @ 12 volts = 54 amps. A 70 AH battery can only deliver about 9 amps before its voltage crashes. To run 12 volt 750 watt battery inverter you need around a 500 AH flooded lead acid battery or a 250 AH AGM battery. To run it from a battery charger you would need a 60 amp charger.

I forgot to mention that the vacuum is 115 volts... So 700 watts @ 115 volts = 6.08 amps

[inetdog]

I forgot to mention that the vacuum is 115 volts... So 700 watts @ 115 volts = 6.08 amps

The basic principle of an inverter is that it takes power in to produce power out. So to produce the 700 watts (~6 amps at 115 volts) out to the vacuum, the inverter has to take in a bit more than 700 watts at its input. Let's say 800 watts in. That would be 67 amps at 12 volts, assuming the battery could continue to deliver 12 volts at that current.

If there were an inverter which could take 6 amps at 12 volts and convert it to 6 amps at 115 volts, our whole society would be different!

Your 6 amp charger produces 6 amps at about 14 volts, or 84 watts. To do that, it takes in roughly .8 amps at 115 volts, far less than the vacuum draws.

By the way, since the inverter is the larger current load, it should be connected to that larger terminals on the battery, if that makes any difference. Usually a dual terminal battery has one bolt attachment and one automotive type post. Either one can handle the full current of the battery.

[RussN9ZP]

I forgot to mention that the vacuum is 115 volts... So 700 watts @ 115 volts = 6.08 amps

Off the top of my head i can tell you that 150watt AC equates to about 20amp DC draw. So you would be looking at 100 amp DC draw from the battery. But what the heck if you have the stuff there experiment with it. Hook your volt meter to the battery when you flip the switch on the vaccume cleaner, you'll see.

[Sunking]

I forgot to mention that the vacuum is 115 volts... So 700 watts @ 115 volts = 6.08 amps

OK that but has nothing to do with the amps from the battery at 12 volts. 700 watts / 12 volts = 58 amps.

12 volt battery at 70 AH GO BOOM trying to draw 60 amps.