Recent content by Greendream

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    Parallel LFP batteries drop voltage during absorbtion, what causes this?

    Ever since I started emailing BB through my non yahoo email account I've been getting better correspondence. Both batteries were carefully packaged up and secured on a pallet. Pickup was scheduled for this past Monday but they didnt get picked up until Thursday (due to our location and the...
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    Parallel LFP batteries drop voltage during absorbtion, what causes this?

    Finally getting the ball rolling on RMA for my 2 batteries. Communication has been difficult but helpful when it happens. They require me to re-box the batteries and ratchet tie them to a pallet. They arrange the freight pickup which I have to pay, they do the repair and replacement and pay...
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    Parallel LFP batteries drop voltage during absorbtion, what causes this?

    Ive not discharged the one battery down that low but I did discharge all 3 in parallel to 43.0V at one point as they had that voltage recommended on the parameter sheet online when the batteries were bought. Now they have it listed at 44.8V for 80% DoD. I have no doubt this 1 Llama is within...
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    Parallel LFP batteries drop voltage during absorbtion, what causes this?

    I should have stated that the 44.8v, I have set in my charger/inverter (LBCO), not from the BMS. I misspoke with LVCO.
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    Parallel LFP batteries drop voltage during absorbtion, what causes this?

    No idea whats going on with your battery, sounds like weak cells or out of balance?. I have 1 of 3 that's close to spec. 44.8v cutoff gave me 91AH discharge It has a bit of weird activity when it gets to the top of charge but eventually balances out and tapers the current as it should...
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    Can I top balance and build my battery in a cold room ?

    The battery spec sheet should provide the temp range for charging. You can also consider insulating the batteries to keep them more on the warmer side as 35F is getting cold for charging some chemistries.
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    Parallel LFP batteries drop voltage during absorbtion, what causes this?

    I received a call from BB today and they were very helpful. Battery #3 seems to be working well for us. Ive discharged it at least 70% and the AH recovered hasn't been less than 1AH off. They had me adjust my charge voltage to 50.4V and LVCO for 44.8V. Ive been instructed not to charge these...
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    Parallel LFP batteries drop voltage during absorbtion, what causes this?

    The LVCO happened around 3AM this morning, BMK reported -60 AH. Solar began charging the battery. It was jumping voltage quite sporadically 44.3-49V. It accepted about 10AH and then hit over voltage 52V+ and settled back into 51.0V. BMK showed -49AH with the battery full. After turning the...
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    Parallel LFP batteries drop voltage during absorbtion, what causes this?

    Thanks for your reply. That sounds very likely. I can't unfortunately. It would likely require me to open the battery and I believe that would cause warranty issues. Do you think it may balance out during discharge? The 14S pack is now at 44.8V discharging at 8A
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    Parallel LFP batteries drop voltage during absorbtion, what causes this?

    I seem to have the odd scenarios. For the past month we've been running on 2pc Llama's. I've seen the BMK show up to 160AH discharge between them overnight. The weird voltage jumping continues and the BMK AH meter never gets back to 0, sometimes it will cap out at -30AH sometimes -12AH. This...
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    Big Battery 24V inconsistencies

    Between my inverter, parallel box and the battery terminals I have a 0.2V difference. In order to hit 51.0V on the battery I need 51.2V absorb at the SCC. The parallel box, in-between the batteries and SCC reads 51.1V. Maybe you're seeing voltage drop between the battery and SCC?
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    Dog Show Battery

    I was arguing in favor of a generator and didn't convince you, that's fine. I hope you find what works best for you! GL in your future shows and I am sure the neighbors on-site will appreciate the less noise.
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    Dog Show Battery

    I would say a good inverter generator is probably the best bet. Our blower requires 20A service when both motors are running. Not sure what the draw is on batteries would be but I'd imagine you would need a nice inverter and some battery weight, or cost if you use LFP. For just occasional...
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    Parallel LFP batteries drop voltage during absorbtion, what causes this?

    I am having a heck of a time with my bigbattery Llama's. Originally I had 3pc. They are oddball 14S batteries and charge to 51V. One of the batteries I have has a problem that bigbattery has said will be replaced after I ship it to them. There seems to be a problem causing the BMS to heat up...
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