diy solar

diy solar

Recent content by sunshine_eggo

  1. sunshine_eggo

    12.8V 100Ah GoKWh Review

    The only way you get safe low temp charging is via Yttrium doping of the cathode.
  2. sunshine_eggo

    12.8V 100Ah GoKWh Review

    About 4 hours of touch time spread out over about a month. I enjoy it. I waste a lot of time... as evidenced by my post count... and my prior face's post count... :)
  3. sunshine_eggo

    12.8V 100Ah GoKWh Review

    Full disclosure: I was contacted through the forum by steve@lightning-energy.cn to review the subject battery. It was supplied to me for free. I think this is the ONE time it's ever paid me to be a post whore. Here's the manual...
  4. sunshine_eggo

    2nd Buy from Amy Wan/Luyuan

    Whelp... So far, so good. I discharged the first as-received cell and confirmed it shipped at 33% SoC based on the claimed capacity. Since I can't specify the tail current on this particular charger, I didn't charge unattended... except when I missed the 0.05C cut off. Charge terminated @...
  5. sunshine_eggo

    RV conversion question - 48v batteries

    Per this: https://cdn.shopify.com/s/files/1/0251/0484/2798/files/Epoch_B48100A.pdf?v=1704491233 It indicates CAN/RS485 communication. This implies it can communicate with a Victron GX device (Cerbo GX or similar). It will not communicate directly with the MP-II (no battery will). However, I...
  6. sunshine_eggo

    BMS/charge controller issue

    Are you observing this when it happens, or are you seeing this typical in operation?
  7. sunshine_eggo

    Solar configuration

    Wire ratings are primarily influenced by temperature - the rating of the insulation, ambient temperature and if it's in any kind of conduit. These UL battery cable ratings are a good place to start. Not endorsing this site as a wire source, but it's a good reference...
  8. sunshine_eggo

    Solar configuration

    Depends on the wire rating and installation. 4awg may be rated for as little as 70A. Size wire for 182.2A and fuse breaker for 1.25X wire rating.
  9. sunshine_eggo

    BMS/charge controller issue

    99% full... If the battery is nearly full, then BMS charge protection is almost certainly the cause. Your cells may be imbalanced. When you cut a battery out of a circuit, there is a lag between cut-off and the charger terminating output. Since the charger doesn't turn off instantly, it's still...
  10. sunshine_eggo

    Parallel more than 8 batteries together?

    The issue with paralleling batteries is balancing the current shared between them. It's possible that imbalanced current draw/charge could exceed the BMS of one or more batteries. In a package like that where you're locked into an Anderson connector, it would seem to be less flexible. If you...
  11. sunshine_eggo

    Battery Cable Size

    The manual provides conductor size recommendations. You'll need to find the appropriate manual for your Phoenix/Multiplus/Quattro. No harm in using your 4/0 cable if they will actually fit. Ugly crimps can be just as good as pretty ones.
  12. sunshine_eggo

    BMS/charge controller issue

    Are you sure it's not the other way around? The BMS is engaging charge protection and then the SCC is spiking because the BMS has cut the battery out of the circuit? This is how it usually happens. Try setting absorption to silly low values and increment it (13.2, 13.3, 13.4, 13.5, 13.6) and...
  13. sunshine_eggo

    X4 lv6548 in 120/240 can I still charge off of 120 volt input?

    On the other hand... <$500 for a 3500W 120/240V predator isn't a big investment... nor is a Chargeverter if you're not in a hurry.
  14. sunshine_eggo

    X4 lv6548 in 120/240 can I still charge off of 120 volt input?

    I know that my Victrons can do that, and my neighbor's MS4024PAE can as well. The L2 phase simply keeps inverting with it's signal ultimately controlled from the master driven by the AC input wave. I really thought 120V/240V constructed from MPP/Growatt 120V in parallel could charge from a...
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