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  • Post in thread: Cell terminal bolt torque - you might be wrong!

    I wanted to launch a new thread because the current thinking is buried in other threads after previous values were determined to be incorrect. TL;DR - use 4Nm max to torque your M6 bolts (or the nuts on your studs). Explanation Many of us were all mislead by the spec sheet of the EVE cells...
  • Post in thread: 2024 YouTube Video Ideas

    circuit breaker and fuse testing. lots of bad breakers out there and there's the debate over class T vs. ANL etc. would be cool to compare LFP vs. AGM/FLA, too (as that goes towards AIC ratings). Probably would have to run some of those tests multiple times each. Over-current as well as full...
  • Post in thread: Changes coming to my RV ...

    I can't believe it but I got it done today. Worked from 4am til 2pm and got the rig outside at 2. Peaked at 4300 watts. Eye candy follows!
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    Just wanted to drop a note to say these busbars are continuing to perform well. I'm so happy I got these. My IR's continue to be amazing and the Orion BMS continues to report that the "State of Health" of the battery is 99% which it never did before (because it saw such variation in the IRs)...
  • Post in thread: Is this 12V battery better than Battle Born?

    I just purchased two of these and will install them into my motorhome and test them. I'll probably also take them apart. I have a youtube channel and can stick it on there... would love Will's input as well since he's done so many of these and I've done 0. I love that you can purchase the guts...
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    Background I'm having a new 5th wheel built and as part of that process, I'm designing and building the battery, inverter, and solar. I want to run as near as possible to 100% on solar for everything including A/C while boondocking (my new favorite activity). I live full-time in the RV (have...
  • Post in thread: Fire!! Never cover LiFePO4 with wood!!!

    It looks to me like the terminal & bus bar connection got hot probably due to a bad connection. The MDF, even under humidity, wouldn't have shorted anything out. Something went wrong with the battery. Without high rez pictures it's hard to tell (you'd need to upload elsewhere and link them here).
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    OK, discharged to 0% (2.000 volts each actually). Raw numbers are below. I'm pretty sure I heard the springs a few times. Maybe I'll capture a time-lapse of this some day. These springs really should have a 3/8" rod between them (not 1/4" like I do). The springs are deforming a bit as a...
  • Post in thread: YES: RV Solar/ Li/ and AC running full time

    Yup! This is my first heating season with the mini-split on solar in my 38' fifth wheel. Heating consumes more power (~2000 watts instead of ~1400) and energy (stays at max draw for a long time), is required for longer periods of time (night is longer than day), has a higher temperature...
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    I wanted to see how much solar I can produce ... I haven't been able to because my battery goes full on sunny days ... so I wasted a lot of power last night and today and ... drumroll ... 24 kWh of solar production on a sunny day in Connecticut in June. That's over 7 solar hours at rated output...
  • Post in thread: EVE matched cells, some cells drops very fast

    I'm currently testing each of my 36 EVE 280 cells at 15 amps. Results so far (23 of 36): 270 278 276 280 280 270 271 270 278 269 268 281 272 274 273 276 270 277 280 277 273 273 275 Varying C rates hasn't changed the capacity I'm getting.
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    TL;DR - fricken' amazing! I haven't plugged into shore power for 2 months.
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    Playing with springs and a new saw blade and guide etc so I can make 16 plywood panels. Got nice new plywood (project stock at Lowe’s). I’m shocked at the fact that I’m unable to tighten the springs down all the way with the wing nuts. I’m going to double check my calculations. That said the...
  • Post in thread: FIRE Eve LF230 and JBD BMS 4S 12V 200A

    Look at the floor of the area where the cells were. ONE cell got very hot. Now look some more - there's a metal frame there. There's some blue plastic from the cell there. My guess is the cell shorted out against the RV frame.
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    New bus bars installed. At 17 amps with old bus bars, I saw a 0.3mv drop across the long bus bars. With the new ones, it was 0.5mv. Expected - these aren't nearly as much copper. But I'd have to think they're copper based on how they're performing. I have no concerns there. I charged and...
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    Victron might arrive tomorrow! :eek: This is how far I got today. I'm quite sore haha. I shined up the terminals with 1000 grit sandpaper, blew it clean with air compressor, wiped down with anti-ox, loctite'd the grub screws, cut the insulation off the bus bars so I could double them up...
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    Got the SCC connected to the power supply and connected to the Cerbo with VE.Direct ... and it's doing EXACTLY what it should - the entire combined system is paying attention to what the BMS is asking for via the CAN Bus. Awesome!!!!
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    Woops! OK, here's some just before I moved in. Too lazy to take new ones right now haha but close enough!
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    Can you tell when I moved the RV south from CT to NC? :ROFLMAO:
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    Here's my next prototype. Square bar on both sides, 5/16" rod, and I moved the upper and lower sets closer to the center. I'm also using deconstructed CALB flexible bus bars (2 pieces for each series connection). The battery is at about 0% and I set all springs to 30mm and I'll observe...
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    The pack I'm prototyping the springs with is 4s. Measurements are cell 1-2, 2-3, 3-4 .. which is why there are 6 measurements. Spring and PSI info: https://diysolarforum.com/threads/cinergis-28-kwh-4-kw-solar-10-kw-inverter-rv-build.13786/post-189207 Terminals got closer together from 100 to...
  • Post in thread: Changes coming to my RV ...

    Coverage of the solar changes:
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    I spent a few hours replacing the skimpy 1/16" x 3/4" bar with 1/8" x 3/4" ... and spent some time getting some nice bends. I also decided I should use the tinned 1/4" x 1" to join the "end" cells before connecting this -- both to match up the resistance of all my bus bars better and to prevent...
  • Post in thread: LiFePO4 prismatic cell short circuit current and main circuit protection

    I prefer to operate based on facts for which I can provide evidence. There is more than sufficient evidence that AIC ratings are important: https://electrical-engineering-portal.com/3-overcurrent-protective-device-ratings-you-must-properly-select#3 If you can provide evidence that you can...
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    y'all hijacking my thread? :LOL:
  • Post in thread: EVE-280 cells should these be clamped tight or spaced for expansion?

    You definitely won't have heating problems from the cells themselves. At 200 amps discharge and 140 charge (100 - 0 - 100 percent SoC) I saw a 10F rise in temp.
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    8.4Ah left and I've got a cell-pair below 2.7 volts. Pack voltage is 48.2. I've configured it to connect to shore at 48v. Assuming the BMS calculation is the same as the CBA IV tester I used, I'm at 98.5% of my original capacity (likely higher). I now also know what pack voltage to use for...
  • Post in thread: Cinergi's 28 kWh / 4 kW Solar / 10 kW inverter RV build

    You have no idea! LOL Plus I want to get my system back online. https://diysolarforum.com/threads/36-eve-280-cells-capacity-tested.16540/ I'm going to match the capacities. I was originally going to pair highest with lowest but now I think that's a bad idea. I'd rather not have cell...
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