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car batteries as storage solution.

  • 26-01-2022 10:03pm
    Posts: 0 [Deleted User]

    The perceived wisdom is that they aren't suitable. I agree conventional lead acid low end batteries are not suitable.


    cars are not being fitted with low end batteries anymore because of the need for start stop systems and regenerative braking/KERS and huge demands from electronics on board along with very clever ECUs which know when to not use stop/start to maintain batteries state of health.

    Enhanced Flooded Batteries and more especially Absorbent Glass Mat batteries are being fitted in more expensive cars.

    They are closer to deep drain batteries that are suitable for heavy duty use and engergy storage.

    multiplying 105Ah by 12V(I looked for a battery for a bmw 6 series on VARTA's website) and some of these monster batteries have a lot of KwH packed in to them

    Buying new and you will probably be saving nothing over other technologies like LFP or NMH or maybe Sodium in the future but picture going down to your local scrapyard and picking up maybe a half dozen of them for tiny money out of scrapped cars and then you might start to go Hmmm, this might just work.

    Lead Acid is a known well, does not go on fire, these batteries are tested to crank consistently at -20 degrees. Hard to overcharge. You generally don't care about weight or size in a stationary application.

    Would these be a good solution for those who are space and time rich but cash poor?