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  • Post in thread: Parallel and series connection of dissimilar amp hour LiFePO4 - best practices

    sorry i described serial example. in paralel they will act as you wrote. if there will be small currents/loads of charge/discharge cycling, it may perform without problem. before connecting them to paralel u should make sure they are charged to the very same cell voltage.
  • Post in thread: can this special charger controller do its job correctly?

    there is nothing else, than photo shows. which means, that the so called charge controller is just a voltage sensor, which triggers the relay. check the cablings... cables from rectifier goes to battery, not to the black box called charge controller... so nothing holds voltage from running up...
  • Post in thread: flat solar collector mist from inside, how to get it out?

    thats something i also have on mind. i allready drilled few mm holes in the left down back of the panel and right top back of the panel hoping for circulation of air... seems like thats not enough, however some little effect is there. if there is a pool on the bottom, it will take weeks to dry...
  • Post in thread: flat solar collector mist from inside, how to get it out?

    i considered similar options, but put the idea away, as i realised - panel is a hot place itself, so there is no need to pump hot air in it. its already in... should be enough to let him sifon over the 2-holes circuit i made...
  • Post in thread: flat solar collector mist from inside, how to get it out?

    i have several flat collectors working fine, but on one of them is mist from inside, seems like water. it was slowly increasing over year, but now its about 80% covered by mist, condensing water from inside. its enough to stop it almost completly gaining heat... its there entire day, sun doesn't...
  • Post in thread: flat solar collector mist from inside, how to get it out?

    update: i drilled 10mm holes to up and down oposite corners, increased them from 3mm. then i drilled another small holes on several places at the bottom to find the pool of water camping there... result - no water came out. it seems to be dry. however, the insulation is mineral wool, so it can...
  • Post in thread: How to rescue lifepo4 battery pack with 1 dead cell

    any reasons why?
  • Post in thread: flat solar collector mist from inside, how to get it out?

    looks like this. fluid is ok, no leaks, no pressure lost... i suspect a glass insulation to have a very little hole somewhere, as the problem was growing for about a year sloooowly...
  • Post in thread: Parallel and series connection of dissimilar amp hour LiFePO4 - best practices

    problem will be balancing, cell destroying and capacity loss. 1- you will start discharging fully charged battery 2- until about 120 Ah discharged will nothing wrong happen, just the 150ah cell will be discharged on lets say 20% depth of discharge, while the 271Ah cell only at 50% DOD 3 - if...
  • Post in thread: flat solar collector mist from inside, how to get it out?

    there is a single glass
  • Post in thread: How to rescue lifepo4 battery pack with 1 dead cell

    situation: - 4S lifepo battery 100ah each cell, connected in serie=13.6v battery - 1 cell is semi/dead, holding voltage, but lost capacity to 20ah, probably overcharged before... it can be charged and discharged, but results in unbalanced battery pack and whole pack is therefore limited to...
  • Post in thread: can this special charger controller do its job correctly?

    i found a company selling wind turbine combo charger controller with divert load, where also abundant power from solars can be used for example for heating... https://windandsolar.com/digital-all-in-one-charge-controller-led-meter-3-phase-dc/ as i went through its cycle it works like this(BMO)...
  • Post in thread: Parallel and series connection of dissimilar amp hour LiFePO4 - best practices

    however you will connect such a different batteries, it will result in much higher aging of the bigger cells, as they will be discharged much more under both - load and charge states. and you will lose control of balancing, as the bigger pack will charge the smaller and hold it on its actual...
  • Post in thread: Alternator charging LiFePO4 ?

    if you connect battery to alternator, there will be a biiiiiiig hole effect, as for the moment the current flow will be very high, almost similar to short circuit situation, if the battery will be discharged and big enough. this situation can overload as well alternator, as well bms and also the...
  • Post in thread: How to rescue lifepo4 battery pack with 1 dead cell

    question is general. what should be the possible solutions for this chemistry in such a situation. doesnt matter how old and what producer... lets just explore and compare theoretical possibilities and formulate circumstances...
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