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  1. linuxgod

    Lithium Battery?

    Be careful with charging btw. If you run the battery way down and rely on the alternator to fully recharge I’ve seen numerous alternators burned out in RVs after 15-20 minutes of run time because LFP has extremely low internal resistance and the alternator will run full tilt
  2. linuxgod

    Lithium Battery?

    Once the engine (radiator, really) warms up it's probably ok. There are chemistries which are much better suited for cold though. Adding manganese or something to the LFP battery changes the chemistry and will let the batteries charge and discharge below freezing. Normal Lithium-ion as well...
  3. linuxgod

    Lithium Battery?

    True. I buy deep cycle FLA for the trailer, not starting batteries, but even still you really shouldn’t go much below 50%. I’ve gone down around 20-30% in a pinch and it doesn’t seem to hurt long term so long as I kept it watered and ran an equalization charge regularly, but I wouldn’t...
  4. linuxgod

    Lithium Battery?

    BTW in terms of weight savings of lithium vs lead acid in our LC... if the ~25# difference matters to you that much when driving a 7000# vehicle, buy the Walmart $99 special and spend the extra $500 on a treadmill instead. :rofl:
  5. linuxgod

    Lithium Battery?

    Nicely put I went with a LFP for my trailer because I was able to get 3-4x the usable capacity for the same weight. In a trailer which was already at (or really about 1% over) GVWR when loaded down, I was very sensitive to the weight. If I had a 40' motorhome I would've bought a stack of FLA...
  6. linuxgod

    Lithium Battery?

    There are tons of good threads on LFP at diysolarforum.com. There's a whole thread on why you shouldn't charge below 0F. Why you cannot charge LiFePO4 below 0 degrees Celsius - https://diysolarforum.com/threads/why-you-cannot-charge-lifepo4-below-0-degrees-celsius.2912/. That's not to say you...
  7. linuxgod

    Lithium Battery?

    If you live in a cold climate, LiFePO4 (LFP) batteries are not acceptable for your vehicle. As @Sandroad notes, you cannot charge them below 32F or you will rapidly destroy them, and you cannot discharge below ~0F. They also have very drastic amperage drops as you approach or drop below...
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