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I recently purchased a set of EVE LF280K battery cells. I have built similar spring-loaded compression clamps in the past, but the 1/4" steel plate which I used in those boxes would tend to bend around the cells if I used the same "just the plates" approach this time. I also increased the number...

I have 3 "12v motor cycle seat" "heater pads installed on 3 separate battery packs in my RV, all are controlled as a group by the heater port on the 200A JK BMS running one of the 3 battery packs. Before installing the JK into this multi-pack "production" configuration, I previously tested the...

I would add a coulomb counter meter (if you do not have one already), and test each battery for charge and discharge behavior while the alternate battery is fully disconnected. Verify that each delivers rated power before reaching low voltage (you don't need to pull them all the way down, I'd...

When you need to make a change in there, just remember: The WHITE wire is the special one. :ROFLMAO:

I just downloaded the newer datasheet for EVE LF280K cells from June 2023 from here (thanks). On these cells, Eve applied a clamping force of 300 kgf for all tests. Elsewhere in the document (section 4.4.2), they describe a minimum of 3000 Newtons (roughly the same value, with gravity at sea...

slightly OT: Steve, it's GREAT to see a new post from you!

The individual red and black wires do not serve a purpose in heating use, and should not be stripped or connected to anything at this time. They may be usable with an un-released "smart charger" product in the future. Connect only the green bundle (as "ground for the heater pad, or "coil -" for...

Your battery pack build could provide the minimum total force of clamping on the cell faces, but it has two issues: 1. Your assumption that 8 inch-pounds at the nut will correspond to 165 lbs of force with each rod. In order to reach that desired rod tensile force value (165 lbs), the nut must...

Let me describe how it will actually work with 2 different-sized parallel battery packs. This is unfortunately very long, because I'm going to be VERY detailed in this response. The 2 battery packs are attached on a parallel bus. The current draw will generally favor the less resistive battery...

Hi Terry, welcome to the forum! I feel that the combination of 3.345 BMS cell overvoltage and 13.6V float charging is a bit questionable, causing solar to generally push the BMS into "high voltage disconnect" on the charging circuit fairly quickly.IMO, although the Trion didn't create an error...

I have posted comments which describe my "Charge LFP batteries from the TV" solution in another Thread already, but that Thread's Title does not do a good job of explaining how this gets put together, and why it's typically better than using a DC-->DC charger "solution". This repeats that...

Here's the diagram for the Tow Vehicle. The hardest part is wiring the ignition controlled dashboard switch, through the firewall. Although I have used 5-pin Relays to choose between the "high-voltage" and "normal Voltage" current paths, I recommend against using automotive 5-pin Relays as I...

As Forbisher just said - I have been running by "30 Amp" Epever BN with a nominal "500 Watt" Array for multiple years without any problems at all. When the batteries don't want to accept all the available Solar watts, the SCC needs to leave the "excess" power in the panels - either by...

IMO: If your usage calls for three 100Ah Battleborns, rather than just two, then you are probably under-pannelled. Remember that the "Standard Test Conditions" STC panel wattage ratings are hardly ever reached in practice, even at Solar Noon on a perfect day. If your panels lie flat on the roof...

For reference, here's my compression method, used on a 4S "12.8V" battery pack. I used springs, 1/4" threaded round bar, and thin steel plates at the two ends. Also note the use of thin plastic separator sheets between cells. Your 200Ah cells might need 5/16 threaded round bar (instead of my...

Some Epever MPPTs are better than others. It's too bad that the superior 'BN' series stops at 40A maximum output power, because I have never liked the 'AN' models.

I have reviewed that spc sheet, and made some posts on Amy's FB page. Here is my assessment, in comparson to a similar specification and test sheet for the newest EVE LFP 280AH cells (from earlier this year): The charging rule for these na-ion cells is: contant voltage at 3.95V (at up to .5C...

MisterSandals has given great advice, but your results are already spot-on for your situation. I set the pvwatts cacluator https://pvwatts.nrel.gov/pvwatts.php to match your location, and array size, on a flat roof mount aligned straight South. On THIS January date, the calculator only shows...

I ordered 4 "120Ah" cells from Basen at the end of March 2021, and they arrived about 10 days ago. I had received a matching Daly 4S BMS about earlier, due to faster shipping. After balancing the cells and building the battery pack, I'm seeing surprisingly GOOD performance. These were CATL...

There are many reports of problems with less complex Renogy components on this board, and the usual summary is "friends don't let friends buy renogy". Their DC->DC controllers have had numerous "issues" reported, and their MPPT controllers have had even more problem reports. That unit combines...

AFAICT, this is a total compression force on the large sides of the cells. Converting Kilogram force (kgf) to pounds == multiply by 2.2, so that's about 660 pounds of pressure. I don't know the sizes of these cells (and can't derive 'Pounds per Square Inch' on those big cells - but this...

It was closed cell foam, but the plastic enclosure was NOT in compression (lacking compression rods). It was bulging a bit, and did not have metal end plates. I see your diagram using solid aluminum sides to spread tension from the rods, that's almost exactly like the battery I'm in the process...

I have Android 12, Pixel 3-XL, and version 4.7.1, working great. But when I installed it, I noticed that the new APK file is quite a bit smaller than a previous version (IIRC, that was Version 4.6.5). I don't know if the software build process was improved, or whether 'legacy' device information...

What he meant is: attaching two panels in series with each other to each of two different Solar Controllers (Tracer BNs @ up to 40 amps each) would be roughly the same as wiring those panels pairs "2S" in Parallel before going into ONE controller, a Tracer AN @ up to 80 Amps. The slight...

I have 3 comments. #1, You probably can't "pull" filament tape, even using multiple loops, tight enough to create worthwhile pressure on those battery cells. Eve's "compression test" results call for 12-16 PSI. I don't know the exact size of those cells in inches, but when you do the math...

Here is a very long post, in which I will try to present a bit information about electrical Code "standards", and then show your high-powered panel arrangement to be similar ("analogous") to code requirements for a separate safety ground wire in all 120v/240v electrical service wiring within...

Your Daly contact is definitely wrong, with respect to two fully independent batteries in parallel at loads which do not exceed the BMS limits of a single battery. I own and use such a configuration myself. One battery is 106Ah with 100A Daly BMS, while the other is 123Ah - also with 100A Daly...

Yep, you need only install a high-current 4-pin Relay along the Battery-->Fuse-->Renogy "12v input", and switch that relay (12V coil)using a very low-amperage 12v switch. (In the dashboard, if you are willing to go to all that trouble. Or in the engine compartment, if you're willing to open and...

Initial test of new "Low Temperature Heater function": The BMS provides this function with no issues, running a heater pad at 2.9A for multiple minutes. For this test, I attached a single "motorcycle seat" 12V heating pad, between the "12V" main output of the 4S test battery and the new 5-wire...