Recent content by GXMnow

  1. GXMnow

    Batteries aren't charging too full, what I'm I doing wrong?

    Looking at that graph, it appears each vertical major division line is at 2.5 minutes apart. So this shows a total charge time of only 4 minutes. That is very short. I assume your batteries are just full. You need to run them down a bit and let them do a full charge cycle that lasts over an...
  2. GXMnow

    Batteries aren't charging too full, what I'm I doing wrong?

    Dacflyer's batteries are essentially the same chemistry as mine. Both are repurposed EV cells. His are in rigid prismatic cases, mine are pouches, but the voltage curves should be the same. In my JK BMS, I have the cell over voltage protect set at 4.2 volts, and I have my Schneider XW-Pro set...
  3. GXMnow

    Adding a third drop in LiFePo4 to two older ones in parallel

    I just paralleled a new set of batteries with my original set that have about 80 full cycles through them. These are larger Li NMC cells, but the idea is similar. You do need to get them as close as possible to the same state of charge. As was suggested, using a separate charger to bring each...
  4. GXMnow

    Adding storage to my Enphase system

    I'll have to check the detailed electric bill, but what I remember seeing before the rate hike is that they would pay the same generation fee back, but obviously not the taxes. I do not remember about the delivery charges. Hmmmm. I am looking over my previous month bill, and I am confused to...
  5. GXMnow

    Adding storage to my Enphase system

    My brother and his wife both drive an EV. With the new rates, their electric bill DOUBLED. They were charging over night when their solar does not produce, and they don't have a storage battery. His wife is now only using the level 1 charger while the sun is out. And my brother is doing a...
  6. GXMnow

    Large capcity NMC

    I am using about 36 KWHs worth of LG Chem Li NMC pouch cells. Each cell is 60 amp hours. I have them in four 3P14S strings. They were originally for the Chevy Bolt. Yup, the ones in the news and being recalled for car fires. Charging them to just 4.1 volts, and running them down to 3.75 volts is...
  7. GXMnow

    Adding storage to my Enphase system

    That is exactly where I am at as well. The safety system is going to be about 50% of the whole system cost. That is hard to swallow. I get the desire for arc fault protection. DC arcing is a huge danger, but the DIY market just has not gotten there yet. I am at the point, I may just slap a...
  8. GXMnow

    Microwave worked on 24V but not on 48V??

    I would certainly double check all of the connections and make sure there is not a problem somewhere. 2,200 watts is not a small inverter. That should fire up a reasonable microwave. Does the oven still work fine on grid power? 1,200 watt may also be the microwave output. Check the actual power...
  9. GXMnow

    Adding Solar Panels Question

    If you run parallel, yes, each panel should be fused. In series, one fuse protects them all.
  10. GXMnow

    Adding storage to my Enphase system

    I am kind of torn on the whole permit issue with the DC panels. I want to build it safe and meet or exceed all the codes. But going through the city is a huge expensive hassle here. That "Arc Fault" protection is looking to be a pain. The only charge controller that seems to include it is the...
  11. GXMnow

    Adding Solar Panels Question

    I just looked at the EP Ever spec sheet on the 4210. The maximum charge power is 520 watts with a 12 volt battery system. It will just go into current limit and you may clip off some power near solar noon. The input power limit for a 12 volt system is 780 watts. SO your 630 watt 3 in series...
  12. GXMnow

    Adding Solar Panels Question

    From those specs, you could add the third panel and run all 3 in series. Your VOC would be 24.9 x 3 = 74.7 volts and x 1.2 is still 89.64, so you have a solid 20% margin. Your input current would stay ISC 9.85 and IMP 9.3 amps. VMP 22.4 x 3 = 67.2 volts at 9.3 IMP amps would be a peak power of...
  13. GXMnow

    Adding storage to my Enphase system

    So Cal Edison is at it again. In effect, they just made my battery system pay off slower, but, no, not really. It just made solar panels worth a lot more. They just upped the rates again. Not sure when the change went through as I have such low electric bills, I have not been looking at the...
  14. GXMnow

    Adding Solar Panels Question

    Which model of EPEVER do you have? What is the maximum safe VOC voltage? To be able to combine multiple panels, you need to look at the IMP and VMP specifications. If the IMP numbers are close, you can run them in series. The VMP voltages will add together while the IMP will be that of the...
  15. GXMnow

    NIPPLE slip

    I have a pretty good guess as to what caused it to come off. The top piece appears to have the threaded hole go completely through. So I will bet, the screw turned and pushed out the bottom against the cell terminal and tore the factory laser weld. If you have cells like this, you need to be...
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