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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...

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...

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!

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)...

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...

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...

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).

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...

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...

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...

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.

TL;DR - fricken' amazing! I haven't plugged into shore power for 2 months.

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...

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.

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...

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...

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!!!!

Woops! OK, here's some just before I moved in. Too lazy to take new ones right now haha but close enough!

Can you tell when I moved the RV south from CT to NC? :ROFLMAO:

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...

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...

Coverage of the solar changes:

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...

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...

y'all hijacking my thread? :LOL:

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.

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...

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...

Here's my Orion passive-balancing 560Ah of cells from 90mv to 10mv in 8 hours.

100% SoC Spring travel: 1.0, 1.4, 1.5, 2.0 2 other things I did -- I tried using the CALB bus bars on my main battery to see how it would fit ... it's cleaner-looking and it's easier to compress the cells by hand (and I can observe the bus bar flexing up, as it should). Second, I arranged an...

Spent some time at Lowes gathering what I needed to build a box. I had them cut the plywood but that turned out to be a bad idea. Thankfully I was able to borrow a circular saw that has a guide on it to fix everything up. I wish I had a shop with real equipment ... would have made this a lot...

My cells expand and contract even with extremely low C rates.

Problem with this configuration is that it doesn't lie flat And flipping the bolt around doesn't work because the washer hits the case. I haven't done any functional testing yet ... that'll come soon.

I just want to thank everyone for the recent influx of testing and investigative work. I hope it's clear that I'm not particularly upset about these cells; as others have said, they provide a good value. All I want to accomplish here is to establish what's reality for these cells for everyone...

The last of 36 cells will have been tested tomorrow. Whew! I've completely disassembled my battery and am toying with a completely different setup. I'm going to try 8 packs of 4 cells with molex and anderson connectors so I never have to unscrew a terminal again and to keep the system...

I recently drove 2000 miles so that put some physical stress on the batteries. They continue to perform admirably. I'm quite happy with these new busbars. Perfect solution.

It connected to shore at around 2.65v (nearly 400mv of deviation - expected, given I have cells that tested to 270Ah and others at 281) so 98.5% (probably higher due to my testing methods here) of my original capacity 1 year ago. I got it fully charged about an hour ago. 125mv of deviation at...

It's alive! And I really need to go to sleep! I couldn't stop. ? All wired up. Producing split-phase 240 VAC! Sending to my VRM portal. I'll plug it into AC tomorrow and start charging, and I'll test connecting to single-phase 120. I also still need to connect the DC-DC converter and...

I'd be worried that their long list of compatible inverters just means the inverter will run (a marketing technique), not that it will properly pay attention to the CANBUS. Each inverter has completely different protocol specs and the BMS would need to be explicitly configured to indicate that...

It was under 1Ah between 2.5 and 2.0 volts. Which is why I don't believe it's particularly damaging because we didn't really extract that many more electrons / move that much more LiFe around... and I immediately started charging the cells.

8mv of delta at that voltage is meaningless. You may be balancing at voltages that are too low which will mess up your balance. Don't balance below 3.4 (preferably 3.45) volts per cell. Which means you need to charge to at least that voltage for bulk and/or absorb; ok to float at 3.4vpc or...

Here's an excellent example of improperly-cleaned terminals that I finally got around to cleaning up. The before & after graphs are amazing.

I'm stoked! The last piece of the puzzle was the generator. I purchase the generator and give it the test. I love love love the Victron Power Assist feature!

My quattro charges its capacitors if I turn them on with AC connected and no battery. The lights in the house severely blinked! (2 5k quattro's at the same time - a lot of capacitance)

I'm still in CT ... COLD ... and I'm using electric for heat as much as possible (mostly the heat pump). I'm burning 40+ kWh/day. Yeah, way past what I can produce haha. My batteries haven't sat at 100% for weeks. So I plugged in and let it hit 100% .. I had almost 200mv of drift ... which...

We'll have to agree to disagree with those who think that applying 60v to a 12vdc FET-based Battery will reliably disconnect the battery. FETs don't work that way, period. The way FETs tend to fail is to continue passing current. That's why you see so many discussions about FET versus...

I got a little present today! My Orion BMS arrived early. So I got that going today and then launched my capacity test. Here's a little info on the Orion and how it interacts with the Victron, etc ... It's pretty complex but it's very accurate. I'm still trying to get it to do the right...

I had a third mini-split cassette installed in the basement, so I can control the temperatures if I need to. It's the smallest size, 9k, which is way too much and causes cycling, which kills the performane of the entire system ... so I only use it when I really need it. I also need to install...