diy solar

diy solar

Recent content by drwormy

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    Dud liitokala "A grade new" cells?

    So i took the punt and ordered 4x60AH supposedly 5C discharge liitokala cells from liitokala Official Store: https://www.aliexpress.com/snapshot/0.html?spm=a2g0s.9042647.0.0.7e8e4c4do4qmPH&orderId=8139911177373910&productId=1005002759997512 Then i read the feedback :-(. They arrived all...
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    Replace car battery with LiFePO4?

    A hybrid supercapacitor / Li battery sounds perfect for your application. The supercaps do the starting. The Li battery just keeps it topped up (supercaps have a reasonable discharge rates). A guy on YouTube has been running a supercapacitor only start 'battery'. An off the shelf battery...
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    Daly smart BMS

    As far as i understand, some Daly's are UART, some are RS485 - depending on what you ordered.
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    Daly smart BMS

    I got mine from Daly on aliexpress when i ordered the BMS. Solar4rvs in Melbourne do sell them with a BMS, they might sell them separately.
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    New Daly "Smart" BMS w/ Communication. (80-250A)

    I use this - for the Sinowealth software, and infer the relationship to the app. https://diysolarforum.com/threads/daly-smart-bms.9070/page-4#post-144059 Seems there are some quirks - ie i cant set SOC via the app, ive read others can.
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    Finding specifics on BMS settings.

    I would get a Smart BMS and be able to program those settings as you see fit. OR tell eg. Daly to setup those settings at the factory.
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    New Daly "Smart" BMS w/ Communication. (80-250A)

    Has this trick (sleep time) done the trick for you? I also found some Daly spec sheets that describe needing 0.6V above the pack voltage to wake up the BMS via charging (second last page): https://www.solar4rvs.com.au/assets/brochures/D-BMS-4S-100.pdf
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    Battery internal resistance

    Yes, Im aware of the considerations of the marine charging folks. My application ive mitigated for those risks by limiting charging current, knowing my alternator properties (ie 13.9V max), using a FET based isolator and still using a hybrid AGM as my main battery. Heck, my typical charge...
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    Daly smart BMS

    I noticed your mobile carrier - if you are close to Melbourne i could help out with my UART cable.
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    Battery internal resistance

    Has anyone measured / have data on LiFePO4 battery "internal resistance"*. By this i mean cells + wiring + BMS. In building my first battery, i was very worried about overcurrent, having taken onboard anecdotes like "a Li battery will suck up all the charge you can throw at it". Also looking...
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    Daly smart BMS

    I tested the Android APP and can confirm i can change Capacity with a 4S Daly SmartBMS. I cant seem to change the SOC value however.
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    Daly 150a bms with renogy hub

    I dont have an answer to your question, but... Could you post up the full PDF of the 150A Daly spec sheet?
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    Daly Smart BMS Software

    As far as i know, the sinowealth software works with the 3s and 4s BMS, but the Daly software does not.
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    LiFepo4 top balancing equipment recommendations

    When charging cells in parallel, 0.1V makes a lot of difference. Looking at the leads your are using - they look quite thin. As has been said, what is the current max output of your PS, and what have you set it to be (ie in CC mode). I built my 4s pack, charged them in series to 14V (at...
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    New Daly "Smart" BMS w/ Communication. (80-250A)

    Last night i ordered a 100A https://www.aliexpress.com/item/4000425316662.html?spm=a2g0s.9042311.0.0.7d5f4c4d6si86M to replace my 60A Daly. In the meantime im thinking of making some videos showing various aspects of the Daly smartBMS, and showing low temp cutoff etc (to save my past self...
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