Question Regarding Power inverter 12V to 110V 900 watts for Installing DVDplayer and TV on my CAR !!!?

a) Using a fresh battery the 1000amps/135min may be acceptable. If 3yr or older I doubt this is true anymore.

Power in = Power out ,12V @1000Amps (12000Watt) = 110V (115V) @ 900Watts + pwr loss (100watts to convert) = 1000Watts should provide power for the 135min, but again depending on Goodness of battery based on age.

b) Car running, the charging circuit typically provides 85Amps - 115Amp based on continuous duty of Alternator.

Therefore: say 100Amps -> 1200Watts = 9Amps @ 120V. w Pwr Loss considered.

c) 1800Watts peak is usually a short duration load, typically for a minute. The Inverter will shut down, but will audible alarm before that happens.

d) Don't do this, the aternator must be able to handle load directly and unless it's designed for such will not provide sufficient output. Usually, 100Amp (1200Watts). May need to get a heavy duty Alternator 150Amps (1800Watts).

e) Parrallel batteries would provide initial power capability, but the Alternator must be able to replinish the power drawn out. This would help for the first 135min - 200min of use.

e2) Series provides 2x12V = 24V, depends on the Inverter. Can it work from a 24V source?

Suggest using a Marine type battery which can handle long duration loads, but they don't like to provide high power draws like that of starting a car, which is typically 250A - 350A in a burst of a couple seconds.

Charging a Marine battery is best at slow rate. Need to determine what the Amps/hour rate is, this is limit not to exceed either loading or charging.

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