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  1. somewhereinusa

    Has something changed?

    For the first seventy years or so of my life. An inverter changed DC to AC and and a converter changed AC to DC. Has this changed? I see a lot of posts with people talking about a converter when obviously they are talking about DC to AC. I just saw an ad with a picture of an inverter that said...
  2. somewhereinusa

    Solar, LiFePo4,Air conditioning in RV

    I'm pretty excited. I got everything wired and working yesterday. About noon I turned on the AC in the bedroom. At about 6PM the panels were still producing more than the AC was using. (Northern Indiana, slightly cloudy, some overcast). I left the AC on all night set on 75°. This is what the...
  3. somewhereinusa

    Safety cutoffs for Valence

    I hesitate to post this, last time I posted something I was told I didn't know what I was talking about. This is all done and installed for testing except for actually hooking up the main relay. It uses external sensing, not internal Valance. Until I can get more data I'll hook up the laptop...
  4. somewhereinusa

    Smoke

    I have noticed a few threads lately about letting the smoke out of various things. I'm not sure if it's still available but many years ago when I specialized in working on British cars I had good luck with Lucas smoke. I have heard mixed results about it working on other than British cars. This...
  5. somewhereinusa

    Lithium battery protection

    Since the lithium batteries I'm using (Valence) don't have any protection built in (only cell balancing), I've designed a protection system. It will totally disconnect the battery bank from everything if things go awry. It will also turn on a compartment cooling fan or turn on a heat pad if...
  6. somewhereinusa

    Valence software

    I've been sharing the Valence software. I'm going to have some surgery tomorrow and typing will be difficult for a while. Could someone else do the sharing?
  7. somewhereinusa

    Check your cable connections.

    Check your cable connections with a infrared heat gun, even if they look tight and good. Check them at a high current draw. I make my own, I have a hydraulic crimper and the correct cable lugs. I was putzing around checking things and noticed one of my 4/0 cables was hot, one end too hot to...
  8. somewhereinusa

    Wiring diagram for converted bus.

    Here's a proposed wiring diagram for a bus I've converted to an RV. Only thing I'm not really sure about is whether to put circuit breakers between solar panels and charge controller. I already have 4 of the batteries installed and am using them. Two more batteries to be picked up the end of the...
  9. somewhereinusa

    Valence software

    Anyone using the Valence software. have you figured out what all of the information is? Is the WH Disch the total for the life of the battery? I'm guessing that PCBA temp is temp of the BCM and cells 5 & 6 are random since they don't exist. Notice that in the above photo there are only three...
  10. somewhereinusa

    Valence U27-12XP 12 volt 138Ah

    I have 4, Valence U27-12XP 12 volt 138Ah batteries wired in parallel. They are used and I got the internal BMS talking to my computer yesterday. All 16 cells are within .006 volts of each other. Total charge of each module (4 cells) is 99.6%. It also shows total cycles of each module mine are...
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