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mena661's avatar
mena661
Explorer
Sep 27, 2013

How do L16's fare under heavy inverter loads?

I realize that I'm probably the only one with these batts here but maybe someone has some in an off-grid home and are familiar with how they run under heavy load? 6V seem to exhibit more voltage drop under heavy inverter loads (ex: microwave use) than 12V's due to design differences. This can be made up with by using more batteries. We know how 6V GC's perform. How do larger 6V's like L16's perform under similar loads?

24 Replies

  • Is the Peukert exponent published for your batteries? This will tell all. Some 6-volt batteries have lower Peukert than some 12-volt batteries. Ballpark number that most articles refer to is 1.3 for deep cycle FLA. It can range from 1.1 to 1.5.

    A lower number generally means less battery internal resistance so two things become apparent.

    Less voltage sag at higher loads
    Less apparent capacity loss at higher loads

    With your bank size I can't imagine either being a problem.
  • MEXICOWANDERER wrote:
    Tradeoff Mena.

    You are trading longevity and abusability for CCA

    I'll say it again - If you have an inverter high loading issue, purchase (3) group 29-31 AGM batteries and connect them for charging purposes via a "smart" paralleling solenoid, and disconnect with topping or equalizing via a switch.

    I can produce EIGHT KILOWATTS of power with 3 AGM group 31 batteries for around 15 minutes. A longer run time would be umm not intelligent with batteries. My 2-volt cells can do it but it takes an F-650 stake truck to haul them.

    L-16 batteries are built for 20 hour discharge rates not 5 hour or 5 minute.


    I kinda learned this through the school of hard knocks when I switched out our little C's batteries for two X group 31 AGMS. We are heavy power users with everything from Microwave to Keurig coffee maker use when dry camping. TV, hair dryer, laptop etc etc etc. Nothing seems to kill them and the voltage only drops slightly. We have 320 watts of solar helping things along but we notice a definite difference with the new batteries. The only thing that skews it a bit is we changed every light in the unit for LED's al mismo tiempo. The best thing is the AGM's never need water. Expensive puppies though and heavy.
  • Tradeoff Mena.

    You are trading longevity and abusability for CCA

    I'll say it again - If you have an inverter high loading issue, purchase (3) group 29-31 AGM batteries and connect them for charging purposes via a "smart" paralleling solenoid, and disconnect with topping or equalizing via a switch.

    I can produce EIGHT KILOWATTS of power with 3 AGM group 31 batteries for around 15 minutes. A longer run time would be umm not intelligent with batteries. My 2-volt cells can do it but it takes an F-650 stake truck to haul them.

    L-16 batteries are built for 20 hour discharge rates not 5 hour or 5 minute.
  • Mena, can anything be learned from putting L16 numbers in my post today instead of T-125s? Not sure anything can be learned using that method though, till the experts give it a look.

    I would not sweat the voltage drop numbers as such, as long as you can stay above inverter alarm. It only matters when you want to go low SOC, but run into inverter alarm issues if you do, so you can't.

    IMO you chose well getting those batts and their huge bank capacity for the type of camping you do. I don't follow all this second guessing on battery type etc.

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