Seplos Battery Build, 48V (51.2) LiFePO4 "Beast Battery Build" BMS

[@Roll2Videos]

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[@Sanwizard1]

Build quality, and BMS wiring layout is great on the Seplos kits. These enclosures replaced my old truck toolbox battery enclosure build. Much nicer. I also love the fact that you can use your own cells. I have seven in total. 4 x 135ah and 3 x 280ah.

[@scarygary3569]

Happy Easter too✌️

[@Roll2Videos]

Yes, Happy Easter buddy! 🐇👈

[@AdamDeLayDIY]

Thanks for sharing! I really do like the build quality.

[@Roll2Videos]

Thank you, One thing I've noticed is there is no on/off switch. There are pins on the board for one 🤔

[@AdamDeLayDIY]

@@Roll2Videos Hmm, kinda surprised that they didn't include that. Seemed to think of everything else.

[@Stejin]

You can shutdown the Seplos which removes the power from the terminals to make the connections to other devices, so there should be not spark then. But it's always a good idea to precharge the capacitors.

[@gruetoo1]

For me I find putting the fuse on top not under the attach busbar/cable better for my OCD. Let's hope it never blows, but if it does it will be much easier to change if it is not buried. Also your torque bar has NM on the top so no need to convert. I don't think the screws are at 7NM that seems excessive, to easy to strip. Most apex type bits are 1/4" SO you can just use 1/4" socket with the proper bit. GL in all your future endeavors.

[@Roll2Videos]

👍

[@hasger1941]

please could you demo step by step how to set up the BMS

[@Roll2Videos]

I've been using the setting that came on the BMS. I do need a firmware update maybe I'll make a video on that and look through some of the settings while I'm there. Not anytime soon that's low on the priority list. @offgridbasement has many videos on this BMS

[@hasger1941]

@@Roll2Videos ok Thanks..

[@scarygary3569]

It's ALIVE...The BEAST lives. Such a sweet project&well done.I watched 1 other dude build 1 and he had a hell of time with his,mostly due to it being shipped with no instructions&all the parts were just thrown inside with no separate packaging. I find OCD is quite beneficial with these kinda hobbies🫣👍

[@Roll2Videos]

Well, thank you. I think I watched the same video. I'll have it running an ac soon 🍻

[@hutchie9615]

Nice video however battery terminal connectors that you can make your battery cable??

[@Roll2Videos]

I can make cables with the 50mm plug-style connector they use here. It's just more cost and time to find them.

[@aday1637]

Is there anyway you could include a link to that installation manual? I cannot find it down below the video. Considering how difficult it is to obtain, it would be a great service to include somewhere we could all find it. Thanks.;

[@Roll2Videos]

www.seplos.com/download.html

[@learningtogether1902]

Very interesting video I have 48v byd lithium batteries 24v each which are connected in series to make up to 48v I misplaced the bic card which means I can't use the bms in the Battery pack. I want to know if there is a way to build my own bms in both packs. Thank you

[@Roll2Videos]

You could buy your BMSs and wire them in.

[@learningtogether1902]

Getting 16s bms would be good for the pack?

[@Roll2Videos]

@@learningtogether1902 If you are putting 16 3.2V cells in series. If you are building two 24v then series connecting them, you'll need two 8s BMSs

[@mirek8557]

Jedine co se mi nelibi je ze uz postrada hlavni jistic 🤕 ( manualni ochrana pred skratem ) a hlavni vypinac ,baterie se da zapnout a vypnout tuskou dirka v ramu napis reset 🤕🤕

[@Demetriy-nt8mf]

D I d you figure out SOC change , mine is completely wrong showing 100% at 52.6

[@Roll2Videos]

I never had that issue. Has the battery been charged fully to reset the counter?

[@Demetriy-nt8mf]

@Roll2Videos I open it up again, it is faulty ceĺ or a connection issue, on a load one cell was dropped too low a d bms shot it down then o. A restart it shows 100% , also the caseit should be laid and I stand it , it should make no difference for cells maybe the connection is shifting but all cells are super tight in the case , when I open the case the positive stud got off the battery maybe I overtide it when I was looking to fix. Socks, I did build small 4 cells batteries in the past but this one is a pain in the ass the cells maybe cheap liitokala they claimed them A grade

[@todamnbad]

Manual I used was only one page, basic but worked, one bus bar was was wrong but i made it work, fuse block was useless so need to replace that someday, i have older model so no breaker

[@Roll2Videos]

Yeah, no breaker on mine, either. I should have said a breaker would be ideal. Thank you for watching,👍

[@todamnbad]

@Roll2 Videos for a true ground yiu will also want to add a ground strap from the front panel to the main body amd another to the cover

[@Roll2Videos]

@@todamnbad Good advice

[@hutchie9615]

Pyres battery cable works sephos battery connector??

[@Roll2Videos]

No, The Seplos uses a 50mm plug with a #1 wire

[@effbee56]

Some issues will aised online about the quality and reliability of these seplos BMS and lack of post sale support. Did you buy this battery or was it sent to you for assessment?

[@Roll2Videos]

It was sent to me. I will be running it this summer; we will see how it performs

[@TheFatman819]

All these battery’s are costing the same, $1500 for 5kw. At this point the it doesn’t matter who you pick 😊

[@seans5960]

Excellent- thank you 🙏🏻

[@Roll2Videos]

Welcome

[@johngrimley3523]

What would the final cost be on a battery like that?

[@Roll2Videos]

Great question, it's been so long since I bought the cells id have to find what I paid for them. Ball park $3500 ish

[@hutchie9615]

Orange battery cable comes in kit????

[@Roll2Videos]

No, Sorry, I should have said that. You'll have to order separately.

[@hutchie9615]

@@Roll2Videos can I get it on Amazon if yes please send the link...

[@Roll2Videos]

@@hutchie9615 I've looked in the past with no luck. The best bet is to reach out to Seplos to get a pair.

[@hutchie9615]

@@Roll2Videos are they in the USA. Or AOL lithium battery can work or where can get lug end for sephos battery

[@Roll2Videos]

@@hutchie9615 They are in China, There email in on the website.

[@nduduzongcobo5941]

You skipped the critical part , I do not know whether you hiding it intentionally or you do not want to share how to connect bms with cells and temp sensors.

[@Roll2Videos]

@@nduduzongcobo5941 Thank you for watching, Did you miss what I said in the intro? "This is part 2?" Here is part 1 kzbin.info/www/bejne/aqmTkJp9fbyBicUsi=_zI8CQGkBsj1GC1u

[@nduduzongcobo5941]

@Roll2Videos thank you for humble reply 🙏.

[@valerie577]

SOK 100Ah | 48V - Server Rack Battery - Canadian dollars $2400. 0:50 Fuses protect wiring not equipment. Let me repeat fuses protect wiring not equipment. You say this fuse will not protect wiring (Very dangers). This company supplies a 400-amp fuse for a 48 DCV system. Not a class T fuse very dangers. 7:00 front plug DC power connectors, now this is becoming a joke. 23:15 Search for the ground screw with a razor knife then it was painted over (to funny).

[@Roll2Videos]

Hello, again Valerie 👋 Thank you for commenting.