Power inverters help

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Power inverters help

Postby Mostca on Tue Jun 04, 2019 7:31 am

Hello,

does anybody out there have any advice on which power inverters are the best I would like to find one that plugs up to the cigarette lighter because the company will not allow you to hardwire it to the battery I would like to be able to plug up a small refrigerator, microwave, small TV, and maybe a tailgating satellite system I'm thinking around 1500 W.

Thanks for any information and drive safely
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Re: Power inverters help

Postby jbakker on Wed Jun 05, 2019 9:01 am

Sorry but you’re not going to be able to run that off a 12 Volt lighter plug.
Here is some math to make your day even better

12 Volt DC Systems

Formula: 12 volt inverters require approximately one (1) amp of DC input for each 10 watts of AC output.
Example: How many DC amps will a 12 volt inverter require to operate three 500 watt quartz lights, or a 1500 watt electric heater?
Answer: 1) Total watts = 1500
2) 1500 watts/10 (from formula) = 150 amps DC from the battery.
That requires a serious set of DC cables and breakers or fuses.
Bear in mind that the above math is just a average not specific to every inverter.
The higher in battery voltage you go the more efficient the conversion gets.
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Re: Power inverters help

Postby raysun on Wed Jun 05, 2019 9:09 am

Is this for a mobile system (car, truck, boat)?
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Re: Power inverters help

Postby sparksalot on Thu Jun 06, 2019 7:30 am

My company had same rule of no hardwire to battery.
What I did was added my own remote big battery in a tool box with a battery isolator, circuit breaker under the hood for over-current protection and ran 120 amp wire from remote battery along and inside of truck frame up to alternator/battery terminal up under the truck hood...worked great!!!
My wire was free so I even ran the Negative wire the distance to under the hood instead of using the truck chassis.

While parked with engine off inverter powered all my needs...at same time truck starting battery was protected by isolator...my inverter also had built-in low voltage shut-down so to not harm my battery...and it simply charged all back up off trucks altenator on my next ride back. :-"
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