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    Diy Lifepo4 charger high powers and more

    This is the schematic ive come up with for now. its an pretty simple one with some protections built in. such as overvoltage cutoff/overcurrent cutoff same with over temp and undertemp. and it will stop charging when the current gets below 15A (ish) so it will charge it quikly and stop...
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    Diy Lifepo4 charger high powers and more

    ive found an power supply and ordered it. cost me about 400 eur for an 110A 24v cc/cv power supply. it weighs allot and Leakage current is pretty low so internaly its pretty good, the cheap power supply's are pretty darn bad. i made an small test vid. when it just came in an i wanted to test...
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    Diy Lifepo4 charger high powers and more

    I live in the EU/netherlands where the grid is 230v and 16A so i can draw 3680W max and without losses its 2400w so i still have some headroom. Happy that i dont have 120v power? seems like allot more hassle to get everything to work reliable. So yeah it sort ofexplains why i am looking...
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    Diy Lifepo4 charger high powers and more

    Diy Lifepo4 charger 30A +/- 100$ Alright ive started with making my own lifepo4 chargers and for now its still the semi manual timer based one. so for now i have 30A max however i am selecting an list of stuff to make an 100A 24v charger which would have an automatic cutoff based on charge...
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    EVE 280 Amp Cells in 12V Pack

    i have to say you have some really nice beefy cables. i only used 2x6mm2 however max ill pull is 50A so should be fine. temp only raises 1.C when running at full load for an hour. ya did make the clamping system allot better than me. i just used an sort of wooden case with some bolts...
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    Charging method lifepo4 280AH EVE (float or not.)

    I just got my 2 boost converters. And the plan with the cells is to sandwich them together with soms studbolts. And an steel/aluminium/stainless enclosure. Or just wood. Altho i dont prefer that next to dangerous connections and due to bad thermal conductivity
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    Going without a BMS for a month. Is this a bad idea?

    Absolute worst case scenario would be that you wreck the cells. But i doubt if that will happen. But how about putting the bms parralel on the battery so its does balance but just doesnt have the overcharge/overcurrent protection. Mppt will take care of the overcharge and an fuse for the...
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    First Build #Budget/Craigslist - Compatibly Questions

    Normal.cutoff limit is at 11.6v so you could go a bit lower. And if you have the power meter than just hook up an light load and just let it run then. Ya will see how much there is in there. High loads will lead to lower Ah ratings when doing an capacity test.
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    Showcasing your solar components in acrylic boxes - like a giant gaming PC?

    what are your thoughts about cell compression? i see you have T shaped extruded aluminium between the cells. but i also read something in the spec sheat about cell compression. so what would you suggest when there is an light load applied. so no heat issues at all. it does look pretty darn...
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    Charging method lifepo4 280AH EVE (float or not.)

    2x temperature cutoff 2x timers so if one fails to shut of the 2nd will do it. boost converters are set at an decently low level so even if it charges 24/7 it still wouldnt cause it to go into overcharge it will reduce cyclic life and it isnt on drawing but i use an 100A DALY bms for each pack...
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    Charging method lifepo4 280AH EVE (float or not.)

    alright this would be the updated version then. a bit simpler than the old one. ill be using 2 countdown timers which can be set from 0-300H so ill just look at the coulumb meter to determine how long it should charge. and if the coulumb meter is wrong it would just float the system a bit and...
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    Charging method lifepo4 280AH EVE (float or not.)

    I did read somewhere else that the voltage isnt related too much with the state of charge. Regarding keeping it at an voltage for an long time. So even with an low voltage its able to charge to 100% SOC So that was my first mistake honestly
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    Charging method lifepo4 280AH EVE (float or not.)

    I do think that all battery charger company's do it on purpose But its obvious why they say ya can abuse them. They will still last way longer than an lead acid so people are happy with it but it isnt how long it could last if its treated with care. But yeah they would want you to buy it...
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    Charging method lifepo4 280AH EVE (float or not.)

    Okay but for now i am only going to use it for electric propulsion on an boat. And for half an year the boat will be out of the water so the cells are gonna be in standby for 5months. And for that time i guess i shouldnt charge it fully with the victron and just let it sit. Then it would...
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    Charging method lifepo4 280AH EVE (float or not.)

    but its kind of wierd to think that the cells can last so much longer just by not storing it at full capacity. and yet most chargers keep them almost at 100% besides the mastervolt victron and some other chargers then. (manualy set lower)
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    Charging method lifepo4 280AH EVE (float or not.)

    ah okay. well then ill buy the small victron charger. And i bought 2 timers which i can set from 1h-270h so i can let it charge for 20h and then stop it and then just leave the system. and then maybe a timer which turns on the victron once a month. for a day then i am in full control. and...
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    First Build #Budget/Craigslist - Compatibly Questions

    doesnt look bad. and it has all what you basicly need. its not the cheapest but if you dont want the hassle to look for an good combination then i would say its fine. and its an pwm which is fine at this power level. Since. 30%@100w=30W less than mppt and at 1kw its 300w! so its better...
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    Charging method lifepo4 280AH EVE (float or not.)

    Okay i just found an good article and now i get it a bit more. How good is the victron blue smart? if i just buy that if i want to charge it slowly and leave it unatended for a few days and then just disconnected the battery. it should be alright then. just because i dont always trust...
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    Charging method lifepo4 280AH EVE (float or not.)

    Thanks for the reply guys. Alright so if i add an timer to the charger. lets say 10h 20h 30h. and after that it will just rely on the capacity then. the coulumb meter should be able to run for almost an year with close to 500Ah 24v (pulls 0.6Ma) the 70% booster charges with 15A so lets say...
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    Charging method lifepo4 280AH EVE (float or not.)

    Alright so ive been tinkering a bit. ive made an schematic. so far so good. i was planning to use boost converters as the charge controllers. and set them to the voltage to charge the 16cells to about 70% and when i flip a switch to 90% when i go for an long trip However these would be...
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