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That's around 2014. I think there is something inherent with their design that is the problem. I've heard of newer ones having similar problems. Mostly in parallel, but not always.

https://www.alibaba.com/product-detail/BASEN-top-ranking-suppliers-LF28-lithium_1600052824675.html?spm=a2756.order-detail-ta-bn-b.0.0.76f32fc2Kxwci4 I did 32 from this one without a problem. Planning to get another 32.

Just order some more busbars. You have time. I currently have 2 16 280ah (not sure there is much difference 272 vs 280) cell strings in parallel. Each string is fused. I'm adding two more strings once I get my second battery order in a couple months. I use double bus bars. I asked for extras...

https://www.bluesea.com/products/category/18/111/BusBars/PowerBar_1000 They have 5/16 and 3/8 so u got to make sure you get the ones u want

You need to use a voltage drop calculator. I would not use a transformer. I would put the inverter as close to it's loads as possible. So that means, I would just run the DC. If you are going to expand, bury multiple cables. At 410 ft and 15.7KW, you are probably into some decent sized wire...

They are daisy chain along one bank from most negative to most positive, then the cable goes to the most negative on the second bank, and so on. That's how the Batrium docs say to lay it out but I don't see a reason it would matter. I had to lengthen the cables between banks.

FYI, there is a holiday in China from May 1-5. So more or less add another week to recent orders. They sure do have a lot of holidays.

I use 4/0 with 1/4" lugs with 4 48v banks. So 4 4/0 cables from main pos busbar and 4 4/0 cables to main neg busbar. IMO, the big thing with 4/0 is you really need some cable support. The cable is a lot of weight and likely there will be some strain due to twisting. I have welded and...

The trace sw. series is the precursor to the xw line. Rock solid units. I started with that years and years ago and still have it sitting on ashelf. Only reason i replaced it was to get 240.

I would get a voltmeter and see if the readings are correct. Looks like probably blockmons. Blockmons can go bad. Maybe swap that one with one on another cell.

That's what I have for charger, but I don't have my batteries yet. Maybe by this weekend. It's only 18.5a at 48v. There is not much selection for 48v chargers. AFAICT it will be fine as long as you have a bms. I'm getting 32 cells too. I was going to create two 16s strings and hook this...

No, because when there is a need to balance, the higher current will allow balancing in shorter time. I'm not saying that I would turn off balancing for good. I'm only suggesting that balance be more of a manual activity rather than automated.

BTW, the recommendation for auto level for LFP: https://support.batrium.com/article/62-how-to-setup-autolevel-bypass-configuration-watchmon

This is what I do and it works great so far. I have a Schneider MPPT 100 and two Midnite classic 150s. The 150's get last sun, utilize shunts, and are in follow me mode. The setpoints on the 150's are the system target setpoints. The setpoints on the MPPT100 are slightly lower. Setpoints are...

Strange, that is not how mine works or how my old xw4024s worked. If the generator is started either automatically via the ags or manually, the XW qualifies power and starts charging in bulk. If the battery is full, it will quickly move to absorb. Mine is set for no float two stage charging. If...

They stay close. Maybe off at most 2-3%. I find the batrium shuntmon to be worse than the others. I have the batrium, two Midnite solar Whizbangjrs, and the conext battery mon.

This guy has a fairly large system: https://diysolarforum.com/threads/top-balancing-a-large-bank.19987/page-3

I have two strings of N and two strings of K. AFAICT, you will have to do separate strings because cell height and width between battery posts is different. You would have to have flexible or diy bus bars. I have them in different strings and so far no problems. They behave like they are...

That's absorb voltage. It was charging at ~54v at the time of the screen shots.

I haven't noticed any temperature change with charge/discharge. Charge maxes out at under 200a in my setup which is across 4 48v banks. So under 50a per bank for charging. But that never is for very long since my daily DoD is low. Typical discharge rate is much lower than that. Any high...

Temp usually 65-75. I'm just trying to figure out why bulk wattage is as low as it is. 140a and 48 nominal is 6720w which jives with the inverter being a 6800w inverter. But I only see ~5500w of charging max...which is probably fine since why run the inverter at it's max. But I'm trying to...

This is what I do. My inverter/charge-controller charge and discharge cutoffs are inside the critical fault lower and upper specs. A fault means a cell had a very low/high reading, there is a heating/cooling problem, or the Batrium had a problem. If that happens, I have to visit the battery...

I've had good luck with the support. Product is decent quality. There is a decent interface which is unfortunately just windows. I have a laptop setup at the battery and also a laptop in the house both monitoring the system. I also have Teamviewer setup (Batrium's recommendation) on the battery...

The only one I have is https://support.batrium.com/article/92-installing-multiple-cell-monitors I don't think they have a recommended configuration.

Batrium wm4 does parallel strings. https://support.batrium.com/article/92-installing-multiple-cell-monitors This is what I am planning to use. I'm starting with two strings and will eventually have 4 16s strings. There is also rec-bms that has a master/slave setup. You would need 6 slave bms...

That's one thing with LFP versus Lead acid. Lead acid is so much simpler. This doesn't matter to us as system designers/builders, but it's a problem if we need someone else to take whatever steps are necessary to turn a system back on. When I had lead acid, I wrote a manual with steps on what...

Had to resync.

You can use either the K9s or blockmons/longmons. Both setups will work. The k9s replace the need for blockmons or longmons. I have 64 cells configured as 4 parallel strings of 16 cells with blockmons. I don't think there is necessarily a better option between K9s versus Blockmons. IIRC...

Its a ddr-60l-24 https://www.digikey.com/en/products/detail/mean-well-usa-inc/DDR-60L-24/8681219?utm_adgroup=xGeneral&utm_source=google&utm_medium=cpc&utm_campaign=Dynamic%20Search_EN_Product&utm_term=&utm_content=xGeneral&gclid=EAIaIQobChMI5qm52_u09AIVCTuGCh0nxATvEAAYAiAAEgJHpvD_BwE

Yeah that's how I see the question. DC just would not be one of the options. It's "do I buy a 24v inverter and use all the cells, or use the 48v inverter that I already have with only 16 cells". My answer would be use the 48v inverter and save up for another 8 cells.