AC/DC Power Inverters - Pensacola Fishing Forum

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Old 09-11-2008, 12:31 AM   #1
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Default AC/DC Power Inverters

I was thinking about buying a 1200 watt power inverter to run 4 300 watt halogens. Does anyone know how many hours of runtime I would get running on a12 volt deep cycle with 875 CCA and a 1200-1800 wattinverter?
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Old 09-11-2008, 01:08 AM   #2
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Default RE: AC/DC Power Inverters

Lets look at Ohm's law...



300 watts at 120 volts = 2.5 amps or current needed....



To bump up 12 volts to 120 volts would requires 10 times the amp draw so it would take 25 amps of 12 volts to run one 300 watt light.



Multiply that by 4 and you have got 100 amps needed to run 4-300 watt 120v lights.



I don't think one battery will last you long with a 100 amp draw on it...



Just my opinion....
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Old 09-11-2008, 01:41 AM   #3
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Default RE: AC/DC Power Inverters

I'm trying to avoid buying a generator so is there any type of charging mechanism that can keep a 12 volt charged. I have a 14 ft alum. with 5 horse briggs. I have got decent lighting right now but I want a litle more light.
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Old 09-11-2008, 01:52 AM   #4
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Default RE: AC/DC Power Inverters

Solar - But if you had sunlight you would not need lamps.....



Wind - But if you had enough wind to power them, it would be to choppy to fish....



If you don't want to buy a generator, look at a 12vdc lighting setup. Get you some starfires on a pvc rig.






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Old 09-11-2008, 07:00 AM   #5
Duerwood Willis
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Default RE: AC/DC Power Inverters

We tried 4 deep cycle batteries, 8 300 watt halogens, 2-1200 inverters and had light for less than 45 minutes. It sucked!
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Old 09-11-2008, 07:58 AM   #6
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Default RE: AC/DC Power Inverters

If you are trying to avoid buying a generator, then just stick with a DC system.
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Old 09-11-2008, 08:10 AM   #7
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Default RE: AC/DC Power Inverters

Quote:
Chris Couture (9/11/2008)Lets look at Ohm's law...

300 watts at 120 volts = 2.5 amps or current needed....

To bump up 12 volts to 120 volts would requires 10 times the amp draw so it would take 25 amps of 12 volts to run one 300 watt light.

Multiply that by 4 and you have got 100 amps needed to run 4-300 watt 120v lights.

I don't think one battery will last you long with a 100 amp draw on it...

Just my opinion....
and thats assuming the invertor is 100% effiecient
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