• September 22, 2020 at 2:13 am#47883
    Mary Chaplin
    Deckhand
    @maryc

    Hi we’re looking into changing our batteries on our 47 Oyster. What make have you got please. We can’t find the link?!

    September 27, 2020 at 7:36 pm#47912
    Mary Chaplin
    Deckhand
    @maryc

    Hi to you both, did you not see my question about Lithium batteries🥴 Hubby is trying to do research as seems to be a minefield!  Thanks Fair winds

    September 27, 2020 at 10:32 pm#47913
    Jamie
    Skipper
    @jamie-ftb

    Hi Mary! Sorry I missed this. Not sure why as I should be getting notifications on the Q&A forum. We’ve moved to a remote island with poor connection once more 😮

    The batteries we installed are called CalB. They’re what the Chinese aviation authority uses on their aeroplanes and is a popular make. We purchased them in Thailand bit I know of people who have shipped them directly from China.

    You can find the link to the video here: https://youtu.be/r22uNigQbvI

    If you use Facebook there is a great group called Lithium on a Boat and it’s full of people with lots of knowledge, as well as people in your situation.

    If you have any further questions, fire away. Happy to help.

    Peace and fair winds!

    September 27, 2020 at 10:39 pm#47914
    Mary Chaplin
    Deckhand
    @maryc

    Thanks

    September 28, 2020 at 12:39 am#47915
    Mary Chaplin
    Deckhand
    @maryc

    One more question what did you do with your engine battery’s, do you now start engine on lithium too?

    September 28, 2020 at 7:46 am#47916
    Jamie
    Skipper
    @jamie-ftb

    We can start with lithium as they’re perfectly capable of doing so. However we felt it wise to keep the engine start battery separate and so we’ve opted to keep the sealed lead acid battery.

    The only issue with this is that we use a Sterling A2B charge unit off the alternator and this is set to charge the lithium, so once the charge is at 100%, it floats at 14.2v for one hour and then drops to 13.8v. The lead acid, meanwhile, requires 14.8v. This means the lead acid is never charged optimally. This was a minor issue once where we had to use a separate battery charger to charge the lead acid fully over night. We’ve only had to do this once in 36 months and we were stuck in the marina for months during lock down with occasional engine start, so this didn’t surprise me. Also the lead acid predates the lithium so there’s that…

    One day we’d like to install an intelligent charge system that not only isolates the engine and house batteries, which ours does already, but also puts in two different levels of charge for each bank.

    Peace and fair winds!

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