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Thread: New battery installation

  1. #1
    Join Date
    Dec 2014
    Location
    Los Angeles
    Posts
    309

    Default New battery installation

    Just installed a Deltran in the Birkin. My Braille finally gave up the ghost after 5 years. Nearly a third of the weight of the old Braille B-129 (3.2 vs 9.3 lbs) The only issue with installation is that the Deltran is slightly narrower at the base in both dimensions. This needs to be factored in in the mounting design.Name:  IMG_1333.jpg
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  2. #2
    Join Date
    Sep 2020
    Location
    Kelowna BC
    Posts
    36

    Default

    Wow looks tiny
    let us know how it holds up

  3. #3
    Join Date
    Feb 2017
    Posts
    59

    Default

    I have one of those in the Van's RV4 with IO-360. I have a Ballistic in the Birkin. Ballistic went out of business. Both about the same size, weight and output.

  4. #4
    Join Date
    Dec 2014
    Location
    Los Angeles
    Posts
    309

    Default

    The weight difference is striking. The new battery weighs about as much as the packaging of the old one.

  5. #5
    Join Date
    Dec 2014
    Location
    Los Angeles
    Posts
    309

    Default

    OK, here's a weird one. After installing the new battery, I did a couple of starts in the garage and everything worked as expected. With the engine running, it measured 13.2v across the posts, no change on acceleration. I fired it up this morning at 0620 for a run through the Santa Monica mountains and I started getting an intermittent alternator light once I was out on the road. I pulled over and checked all of the connections. I couldn't find anything amiss and as the voltmeter was indicating 13.9v, I pressed on. The light would go out at idle but continued to flash intermittently under acceleration. Screw it! I went on to have a wonderful morning drive.

    I am wondering if the flashing light is the result of an interaction with the BMS on the new battery. Has anyone else seen this happen? Interestingly, the vm indicated 14.2v with the old battery but indicates 13.9v with the new battery. Anyway, the scuttle comes off tomorrow in order to recheck all of the appropriate wiring in detail.

  6. #6
    Join Date
    Aug 2006
    Location
    Houston, Tx
    Posts
    368

    Default

    Check the belt tension.

  7. #7
    Join Date
    Dec 2014
    Location
    Los Angeles
    Posts
    309

    Default

    It’s fine, hasn’t changed. I plan on giving Deltran a call this week as well.

  8. #8
    Join Date
    Dec 2014
    Location
    Los Angeles
    Posts
    309

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    I spoke with a gentleman at Deltran this morning. He said that the BMS is designed to accept ups to a 10a charge with any excess bypassing the cells. He hasn't heard of any interaction with an alternator light. I may get to pull the scuttle later today to start to check the rest of the wiring across the kill switch etc. This may be delayed as i am having a great time setting up my new Quick-Jack lift (quarantine gift to myself).

  9. #9
    Join Date
    Jan 2020
    Posts
    199

    Default

    Interesting phenomenon, like you I would have expected the same 14.2V with the engine running. I wonder if the alternator warning light is due to the BMS protecting the the battery and the alternator's current spiking briefly as a result. Any chance your alternator is larger than your battery can accommodate?
    Greg

  10. #10
    Join Date
    Dec 2014
    Location
    Los Angeles
    Posts
    309

    Default

    The fellow I spoke with at Deltran couldn't really speak to this. I'm running a 40a alternator through a 10a fuse. The max charge rate for the battery is 40a. The problem isn't evident from the basic numbers. I finally have time today to check the wiring and do some diagnosis. Inquiring minds want to know!

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