How to Charge RV Battery with Generator : You Should Know

How to charge RV batery with generator

4 thoughts on “How to Charge RV Battery with Generator : You Should Know

  1. Glenn Matthiesen says:

    Hi David, After reading your article, it appears you have a unique perception of RV battery charging, electrical systems and terminology. In the first section,”How to Charge RV Battery with Generator” it seems you’re describing a portable 12V power pack and calling it a “generator”. A generator is usually a gas powered unit such as the Honda EU2000i shown and does not require “charging” from a 120V AC outlet.
    In the section “Charging with a Converter” you state, “this device is not an efficient charger”. This statement is incorrect. Whenever your RV is plugged in to a 120V AC source, the on-board converter is charging the on-board batteries as well as providing DC power to the water pump, lights etc.
    In fact, most North American made RV’s and travel trailers are equipped with an IOTA DLS45 AC/DC Converter or similar. This is a very good converter/charger and IOTA now offers and add-on module, the “IQ4 Smart Charge Controller” for $36.00 CAD on Amazon. The IQ4 Smart Charge Controller simply plugs in to the DLS45 and provides automatic 4-stage charging; Bulk Charge, Absorption Charge, Float Charge and Maintenance Charge, providing longer battery life.
    When Boon-docking, all you need to do is connect your RV’s shore-power cable to a gas inverter/generator to efficiently charge your batteries.

  2. Jake says:

    “A converter, as the name suggests, converts 120V AC power into 12V DC.

    However, this device is not an efficient charger. It can only provide an average of 40 amps, and charge your batteries at 3 to 5 amps.”

    Umm.. what are you talking about?
    If the converter is rated at 40amps, it could charge your battery at 40amp (minus some power loss due to the effiency of the converter) provided the AC input is at least 40amps. Whatever that input may be; shore power, generator.

    The only other requirement would be that if the battery is sealed lead acid, that the battery capacity be high enough. I don’t remember the numbers, but due to the internal resistance of lead acid.. the charging rate is limited.
    Lithium iron phosphate battery can usually handled at least 100 amps charge.

  3. Jake says:

    “A converter, as the name suggests, converts 120V AC power into 12V DC.

    However, this device is not an efficient charger. It can only provide an average of 40 amps, and charge your batteries at 3 to 5 amps.”

    Umm.. what are you talking about?
    If the converter is rated at 40amps, it could charge your battery at 40amp (minus some power loss due to the effiency of the converter) provided the AC input is at least 40amps. Whatever that input may be; shore power, generator.

    The only other requirement would be that if the battery is sealed lead acid, that the battery capacity high enough. I don’t remember the numbers, but due to the internal resistance of lead acid.. the charging rate is limited.
    Lithium iron phosphate battery can usually handled at least 100 amps charge.

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