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Recent content by timblack1

  1. timblack1

    TCT & MPPT

    I appreciate the recommendation to favor parallel strings. That requires buying more wire. Space and weight are at a premium on a camping trailer, so some might welcome a 10% performance improvement from a TCT array. The increased cost and complexity of a passive TCT configuration amounts to...
  2. timblack1

    TCT & MPPT

    I appreciate your taking the time to give me your opinion and recommendation regarding a better way to go. How are you arriving at that that conclusion? If that conclusion is correct, then I can see my original question is not worth answering. However, that conclusion does not appear to be...
  3. timblack1

    TCT & MPPT

    The shading scenario I have in mind is an array on top of a camping trailer which will be in many different shaded environments, like forested campsites.
  4. timblack1

    TCT & MPPT

    Background info I have an MPP Solar Hybrid LVX 6048, which uses Maximum Power Point Tracking (MPPT). TCT refers to a "total cross-tied" panel array wiring configuration, like the configuration pictured at https://www.researchgate.net/figure/Total-Cross-Tied-TCT-configuration_fig2_316359468...
  5. timblack1

    Where is @Will Prowse?

    @Will Prowse Maybe you could find a feasible way to increase panel efficiency by cooling the panels.
  6. timblack1

    Future of DIY LiFePO4 looks bleak…

    From what supplier? I'm in the market for grade A cells.
  7. timblack1

    Fact check: Higher volts requires larger gauge wire

    Thank you. The manual at https://watts247.com/manuals/mpp/PIP-LVX/LVX6048%20split%20phase%20manual-20210312.pdf?x65773, p. 28, says the LVX 6048's "Max. Input voltage (Maximum PV open voltage)" is 450 VDC. So I believe the 260 V the arrays I'm planning could produce should be far enough below...
  8. timblack1

    Fact check: Higher volts requires larger gauge wire

    Oops...I should have said it's rated for 600 volts, not 2000.
  9. timblack1

    Fact check: Do All-in-ones burn off unused PV power as heat?

    He does exist. He was right to caution me that I needed to be sure the all in one has adequate ventilation to dissipate the heat it will produce; I think that was the main point he was making.
  10. timblack1

    Fact check: Higher volts requires larger gauge wire

    The fellow behind the counter at a solar store gave me some good advice, but stated a few things on which I'd like to get a second opinion. Here's one: 8 AWG wire could handle 9.6 A over 40 feet if there were only 1-3 panels put in series (creating 37 - 111 V), but since I plan to put 7 panels...
  11. timblack1

    Fact check: Do All-in-ones burn off unused PV power as heat?

    The fellow behind the counter at a solar store gave me some good advice, but stated a few things on which I'd like to get a second opinion. Here's one: The MPP Solar Hybrid LVX 6048 all-in-one inverter will waste excess power coming from the solar panels by burning it off as heat. Is that...
  12. timblack1

    Insert all-in-one & LiFePO4 battery into RV's existing system with converter

    I've made a diagram of the system I'm designing at https://diysolarforum.com/threads/5kw-48v-system-sizing-circuit-safety-check.23725/. I've found physical locations for each component to be mounted in the trailer. I haven't bought the AIO yet, but would like to buy an MPP Solar LVX6048...
  13. timblack1

    5kW 48V system sizing, circuit & safety check

    I should have said "280 Ah" cells; sorry for my mistake.
  14. timblack1

    5kW 48V system sizing, circuit & safety check

    Just for reference, in case someone wants a text description rather than just a diagram, I described the idea in the original battery layout above at https://diysolarforum.com/threads/mixing-12s1p-4s2p-to-stay-at-48v-but-increase-capacity.23215/, and asked if it would work.
  15. timblack1

    5kW 48V system sizing, circuit & safety check

    Thank you for this feedback; I need it. I have not bought the cells yet. My goal is to have a battery with at least a 16.1 kWh capacity, to have 3 days' worth of capacity to handle a 5.38 kWh/day load. 20 3.2V Lishen 280 Ah cells would provide that capacity, but I've been unsure whether there...
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