diy solar

diy solar

Recent content by Carlos Carrapiço

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    Aliexpress BLS LiFePo4 cells problem

    Thank you Sir. In my case I do think top balancing is the correct way as the batteries will most often be fully charged. Concerning the internal resistance, I realised that the uncertainty on the resistor and multimeter was comparable with the calculated resistance and therefore all results...
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    Aliexpress BLS LiFePo4 cells problem

    Hard to tell as due to the covid-19 I have put my boat batteries DIY upgrade on hold. Meanwhile, I was looking for a good power source to do a top balancing and put in practice what I learned here. I guess considering the price I payed, the weight savings vs lead acid, if I get 90AH of the 100AH...
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    Aliexpress BLS LiFePo4 cells problem

    I have also measured the DC resistance of the cells and got something between 3 and 8 mOhm. Have no clue if this is good or bad. The AC impedance stated by the seller is one order of magnitude lower...
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    Aliexpress BLS LiFePo4 cells problem

    I'll try this. Thanks One additional question: The cells have been dropping in tension when at rest. Is this normal? Table with details bellow
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    Aliexpress BLS LiFePo4 cells problem

    I would like to say how appreciated your help is. I jumped on this adventure hopping not only to save some cash but also to have a fully functional and customised system to my needs. Ended up with more problems than solutions. Thank you all for your help.
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    Aliexpress BLS LiFePo4 cells problem

    I guess that is exactly where I stand :unsure: What would you advise? I have to decide if I open a dispute or not until Saturday evening :(
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    Aliexpress BLS LiFePo4 cells problem

    I know but because one cell goes too high and the BMS kicks in stopping the charge process, this was the highest I managed to achieve. I did this by charging all 1P4S banks with a 14,2V Victron charger and then parallel all cells in a 16P1S configuration for a couple of days.
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    Aliexpress BLS LiFePo4 cells problem

    I did all measurements directly on the cell poles or as close as possible to the source. The only length of cable is the one from the multimeter.
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    Aliexpress BLS LiFePo4 cells problem

    This is my first post although I have been registered and following for a while. I have acquired the 16 prismatic aluminium cell pack from BLS following the review and advise by Will in his website. Additionally, I have acquired also 4 common port BMS rated for 100A...
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