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How long will an inverter last on a car battery?

Will alternator charging 12V battery attached to 220VAC inverter connected to in-car 144V charger charge EV?

  • Such an arrangement presupposes that the alternator can be powered to rotate separately. Will this work to charge the EV car batteries while the car is running in order to do away with several hours of at-home charging?

  • Answer:

    Yes, it will work, but at a significantly low efficiency. Every time you convert the voltage, you are losing energy as heat. You will also want to upgrade the alternator, as most modern cars only come equipped with alternators capable of sustaining the electronics placed by the manufacturer. You might look at a solution involving only a single voltage change, from 12 to 144. No since in inverting and then rectifieing the power, when you can just invert it once and be done with the whole mess.

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