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SlowBro
Explorer III
Jan 04, 2021

[SOLVED] Can an inverter on a car charge the house battery?

I've got a 2006 Toyota Sienna with a 150 amp alternator and the RV converter is 45A. Battery is a group 24 lead acid. I want to know is it feasible to charge the house battery using an 800W inverter from the Sienna to the converter and a 15A adapter? I don't want to strain the alternator.

Ideally I'd install solar but this is for occasional recharges, not daily.

Edit: Solved this. Even my cheap inefficient Chinese generator only uses about $12 in gas to run for six hours, so I will prefer that. But the inverter uses about as much current as idling with the A/C on, headlights, and radio, so it should be safe for occasional use this way.

42 Replies

  • Where oh where did you get the silly notion that the alternator doesn't charge batteries?
  • I do also have a 6A car battery charger.

    The inverter to converter makes the most sense, if it won't burn up the alternator. But I'm finding the charge rate of the converter may require a lot of hours of car idling. I guesstimate 6 hours on charging from 50%.

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