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IanD

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Everything posted by IanD

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  8. And this regular charging comes from where -- the sun that shines every day, or the generator you run every day? The single biggest complaint of boaters about LFP batteries is how expensive they are; since LTO are at least 3x more expensive still, they're off the board for most people. If you want to spend 3x the money, get a 3x bigger LFP bank so you don't have to recharge so often. Or spend 1/3 the money and get a LFP the same size that will still last longer than most boaters own a boat, even if you use it hard every single day...
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  10. What do you mean by "cost over time" -- number of cycles? Yes the claimed 30000 cycles for LTO is a plus point if the batteries are being fully charged and discharged twice every day all year e.g. in a forklift), in theory they'd last 41 years compared to 7 years -- always assuming the cycle claims are correct, there's a lot of uncertainly about this for LTO because of the many things which affect this. No canal boat is ever going to get anywhere near this usage pattern, even an inveterate long-distance CCer who moves most days all year is unlikely to exceed a few cycles per week at most, and usually rather less than that. So if you think having an LTO battery in your boat that might last 200 years is a plus point, go for it. For anyone else, an LFP battery is likely to last longer than the rest of the boat so that'll do... 😉
  11. Maybe because secondhand stuff that nobody wants can be dirt cheap... 😉
  12. The big problem: LTO cost per kWh is more than 3x higher than LFP -- from the Bimble website... (longer life is irrelevant for canal boats, maybe 120-180 years for LTO vs 20-30 years for LFP)
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  17. Yeah, corrected, that site is a bit rubbish innit? The disadvantages of LTO (low density and especially high cost) are well known -- loads of links out there, all you have to do is go and look, but that would mean reading something written by someone else .. but it's the cost that's the real killer.
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  21. The reason LTOs are not widely used is low energy density and high cost compared to LFP -- for most applications these matter far more than the long lifetime and low-temperature charging which is why hardly anyone uses them. https://www.ecolithiumbattery.com/lithium-titanate-battery/ 1. Low energy density and high cost. The price of lithium ion titanate battery is high (high production cost and high humidity control requirements), about $1.6USD per watt-hour, and the gap between lithium iron phosphate battery and LTO battery is about $0.4 USD per watt-hour.
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  23. The real shame is that LFP batteries are perfectly capable of being charged at reduced rates below 0C (down to -20C for BYD IIRC) but this needs a more sophisticated BMS and better cell characterisation, which few suppliers bother to do... 😞
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