How long will my battery last with my power inverter

Hello,
We have a lot of customers ask how long a battery will last with a power inverter. See this quick video for tips.

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5 Responses to “How long will my battery last with my power inverter”

  1. Mari says:

    How do I find the amp hour rating of my battery?

  2. Laura says:

    Hi Mari,
    Most deep cycle ba tteries in the 55-69lb range that are 12 volts are usually rated in 24, 27 or 31 group sizes. If you own one of these batteries use the following chart:

    Group 24 – 80 amps
    Group 27 – 100 amps
    Group 31 – 105 amps

    Sometimes it is displayed on your battery. If you are using a standard car battery, it is typically 40-60 amps depending on the battery. Again, these are just approximates. Each battery on the market is different. The bigger the load on your battery, the faster the rate of discharge.

  3. Frank Rod says:

    Question?
    I am going to use three batteries in series, which will be hooked up to my inverter.

    My inverter is 800W my Battery amps are 65+65=75

    How long would my battery run time be? Please reply with the formula.

    Thanks!

  4. tim says:

    you mean parallel series will tripple voltage and amperage will stay the same i have an amp that pulls 75 amps max if i use 2 normal batteries about how long will i get if i was to pull maxx amperage

  5. Administrator says:

    I need more information from you to answer this question. What is the “amp” that pulls 75amps? Are these AC or DC amps? What do you consider “normal” batteries, there are many different types of batteries. The most important piece of information is the amp hours of the battery. Once you know this you can tell how much power you have to use. Series doubles voltage, Parallel doubles amps.

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