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Post by peterboat on Dec 2, 2018 11:51:02 GMT
Ricco, I have 14 LifePo4 batteries 4 for leisure, and ten for electric drive, secondhand they wernt expensive. I dont think I could ever go back to crap lead acids, to much faff looking after them. JohnV has four as well we are both finding them a pleasure to live with, mine are sitting a 26.8 volts with 26 amps coming in from solar.
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Post by Deleted on Dec 2, 2018 11:54:17 GMT
26a from solar in December ? That's impressive.
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Post by Clinton Cool on Dec 2, 2018 12:33:51 GMT
OK maybe I shouldn't write them off just yet. Where can I do some reading about them, regarding charging regimes, longevity, potential pitfalls etc?
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Post by Gone on Dec 2, 2018 16:43:40 GMT
I was reading (don’t remember where) but as the number of electric cars goes up there will be large numbers of used batteries becoming available. These will have lost about 50% capacity so no longer have enough range for many car drivers, but plenty of life left. I reckon in about 7 years I will be able to change over., and it will be fairly low cost. Here’s hoping.
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Post by Deleted on Dec 2, 2018 16:55:37 GMT
Thats an interesting theory.
There are second hand PRIUS batteries available quite cheap. They are NiMh batteries which are like Carlsberg "probably the best batteries in the world" however the size of the battery pack (144v in the case of PRIUS I believe, made up of individual 7.2v cells) means that dismantling them is awkward and dangerous.
Obviously I can do these things due to having trained with MacGyver in a former life but I wonder if scrap electric vehicle batteries are actually suitable for boat use.
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Post by Gone on Dec 2, 2018 20:13:25 GMT
Thats an interesting theory. There are second hand PRIUS batteries available quite cheap. They are NiMh batteries which are like Carlsberg "probably the best batteries in the world" however the size of the battery pack (144v in the case of PRIUS I believe, made up of individual 7.2v cells) means that dismantling them is awkward and dangerous. Obviously I can do these things due to having trained with MacGyver in a former life but I wonder if scrap electric vehicle batteries are actually suitable for boat use. If you can buy them for say 20% of new price, reconfigure them as 12 or 24v and then sell them at at 33%of new price, there is money to be made. So it will happen.
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Post by Graham on Dec 3, 2018 8:52:07 GMT
LiFePO4s costs taken overall compared with lead acids cost less than half the cost of lead acids. Are more forgiving and with the right control gear are virtually bomb proof. The average boat with a 100A alternator can charge a day's worth of power in the same time it takes to heat the water. They love not being fully charged.
They have one disadvantage they do not like being charged in the cold, below 5C is the normally recommend minimum. So do not like being in engine bays on narrowboats.
In the last few months I have installed on average one bank a month. Could have installed more if I had the time
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