diy solar

diy solar

Recent content by Gazoo

  1. Gazoo

    Best LifePo4 charge controller settings known to man for Maximum Service life and Minimum battery stress!!! 5,000-10,000+ cycles?

    If the voltage doesn't drop below your float voltage then there is a small current going to your cells. Whatever you are using to measure the current might not be able to measure that small a current.
  2. Gazoo

    How to tell the difference between Grade A and Grade B cells.

    I am a little late here but just curious. Out of the 530 orders how many were for batteries....if you don't mind my asking.
  3. Gazoo

    How to tell the difference between Grade A and Grade B cells.

    I have had a few good experiences with Aliexpress and zero bad experiences. But none of the items I ordered were batteries and I would never order batteries from them. So many on this forum have posted bad experiences ranging from bloated cells to capacity less than advertised to fake QR codes...
  4. Gazoo

    Can LiFePO4 Batteries Combust in Thermal Runaway Event?

    I don't think it is. We have been through this many times before and I believe it's leakage current at least with the EVE cells. But I also think there are certain scenarios that could cause problems and it's good to put insulation between the cells especially in a mobile environment. In the...
  5. Gazoo

    Best LifePo4 charge controller settings known to man for Maximum Service life and Minimum battery stress!!! 5,000-10,000+ cycles?

    Sad this thread turned into something complicated when actually maintaining LFE is so simple. Anyways I had to tear down my pack because I moved and haven't set it back up yet. Before I moved I tested the capacity of my pack which had been floating at 3.4 volts per cell for 8 months. I use the...
  6. Gazoo

    EVE-280 cells should these be clamped tight or spaced for expansion?

    I know there was a photo posted somewhere of the hydraulic fixture they use for testing. It does apply the same force no matter the SOC. and this came from another source. I don't know what they mean by fixture. I think the best information we have from EVE came from the conversation...
  7. Gazoo

    Best LifePo4 charge controller settings known to man for Maximum Service life and Minimum battery stress!!! 5,000-10,000+ cycles?

    Curious if you have you studied any of the manufacturers spec sheets? Typically, cells are rated for at least 2000 cycles at full C rates. EVE makes high cycle claims depending on C rates. If I only got 1000 cycles out of a LFE cell I would be severely disappointed. Granted the cells don't...
  8. Gazoo

    EVE-280 cells should these be clamped tight or spaced for expansion?

    That may be true of some Chinese companies. But I am quite certain battery manufacturers like EVE, CATL, Lishen and the other big ones including Samsung and LG stick by whatever they document in their spec sheets. There have been people post on this forum who have good functioning cells after 10...
  9. Gazoo

    EVE-280 cells should these be clamped tight or spaced for expansion?

    As far as I can recall that document was supplied to Amy Wan by another forum member as a favor to her. It's a basic guide and compression is tricky unless using springs. It's good to keep in mind too much compression is worse than no compression. EVE has made recommendations for compression...
  10. Gazoo

    Pack / Cell compression Optimized By Using Springs.

    I have the older 280ah cells and they are kinda like what was explained here. I did slight compression with a full SOC. I have not tried to flatten them out and I have not installed my braided busbars yet. Having said that I have noticed the cells expand while charging and contract when...
  11. Gazoo

    Pack / Cell compression Optimized By Using Springs.

    That's very true and another reason it's recommended to put a spacer between the cells even if using springs. If using in a stationary environment like I do one doesn't need to be too picky although since watching my cells expand and contract, I have always recommended using braided bus bars no...
  12. Gazoo

    Pack / Cell compression Optimized By Using Springs.

    The compression PSI recommended by EVE is to be maintained across all states of charge. That's the reason springs seem to be the best choice, but I think foam would be a good second choice. EVE uses a hydraulic jig to compress the cell when they do their analysis to ensure perfect compression...
  13. Gazoo

    NEW Bluetti Sodium Ion Battery Power Units

    I posted an update in the thread I started here concerning Sodium Ion cells.
  14. Gazoo

    CATL Sodium Ion Cells

    I sort of lost track of the progress of Sodium Ion cells. I looked into it some more today due to the discussion in the Bluetti thread. I was surprised to find CATL has been manufacturing these cells since July of 2021 just like they said they would. And we can expect to see major improvements...
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