You "could" run a 120V 5A window AC unit off a 12V deep cell battery but, assuming 100% efficiency (something you can never get), you would need an inverter or motor-generator set and 50A out of the battery to run, and maybe 5 or 10 times that to start.
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The whole purpose of an inverter is to convert DC to AC.Mainly, you should check the voltage of the inverter, and of the battery - they should match.As to the 350 watt: the battery must be able to provide that much power. Check the battery specifications. Actually, it is also possible that you take less power from the battery - it really depends what devices you connect to the inverter.
Automotive battery is used for cranking purpose of a vehicle,it needs high current discharge at the time of ignition.Where as an Inverter battery used as a power bank and its discharge is need based at the time of power failure.
In UPS ,the main power comes to the UPS and is used to charge a battery inside. The output from the battery is fed into a sine wave inverter which converts DC into AC and feeds to the computer in case of a power failure. In such a scenario, the battery is stopped from charging and instantly starts to supply power to the computer. In Inverter ,AC is converted into DC and then is used to charge the battery. When the power supply goes off, the relay triggers the switch from mains to inverter. It is the use of a sensor and a relay that is the main difference between a UPS and an inverter, otherwise the two are same. And the use of relay and sensor cause the time delay in power supply from an inverter.
A DC/AC power inverter is used to convert DC, the power that comes from a car's battery, into AC, the kind of power that is supplied to a home and used to power larger electronics.
An inverter simply takes a DC voltage, usually from a battery, and converts it to AC for use by standard appliances. A UPS does the same thing, but has added circuitry to charge the battery when AC utility power is available, and to automatically switch the inverter on when utility power fails.
A Cobra power inverter changes direct current (DC) to alternating current (AC). It takes battery power and inverts it so that common household appliances can use the power.
By saying no engine installed, I hope you still have the battery installed, in which case you would simply turn the key (obviously you can not start the engine!). Then roll up/down the window. If there is no battery, you will have to play about with the central locking system. Open it, locate the power supply cables and apply the appropriate (usually 12 V DC) to it then you can roll up/down the window. To do this you have to be certain of the wiring, or else you could permanently or severly damage the system (electronics) or even short the battery. BE VERY CAREFUL.
Inverter is the one which converts DC to AC. UPS is the one which provides you uninterrupted power supply. UPS as a system comprises of converter (converts AC to DC), battery, battery charger circuit and an inverter (converts DC to AC). Inverter is part of UPS.
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There is no free power. Inverters always waste some power; they are not 100% efficient. You can't take as much power out of a battery as you put in to it.
A Cobra power inverter changes direct current (DC) to alternating current (AC). It takes battery power and inverts it so that common household appliances can use the power.