SOK 48v Server Rack Battery - 450A Front Terminal Current Test

[@CurrentConnected]

It's about 30 watts of heat from one side to the other (75mv drop @ 450a).

[@Sylvan_dB]

Was just going to ask about the voltage drop. 😂

[@offgridwanabe]

Are those bus bars plated copper or brass

[@HighTechLab]

@@offgridwanabe I’ll check tomorrow, I know the flexible ones from cell to cell are most definitely copper, I didn’t consider this one being different.

[@offgridwanabe]

@@HighTechLab Not that it matters my friend as you have proven they work.

[@JFK666666]

Very nice demonstration of parallell terminals' capacity :)

[@Doctorbasss]

Knowing that rating is as relevent as your inverter continuous power is.... I would be curious to see that 20kW continuous 48V solar inverter!

[@jamess1787]

I saw you over there first! Thanks Dexter!

[@simon359]

From my understanding most battery manufactures won’t allow 450 A continuous running into charge the batteries without doing damage! I have eight Battle Born Batteries and been told at 48 V that no more than 100 amp should be going through to charge them.

[@HighTechLab]

You fail to realize the current is not going in to charge the battery, it’s going in one terminal and out the other. This would be for parallel battery set ups where you have a lot of them in a stack daisychaining.

[@simon359]

@@HighTechLab Thanks for the clarification. I’m still learning, and had more than 150 A going into my batteries before I found out that I should’ve only had 100. What I did was limit what my victron charge controllers could take in for amps. Moving it from 100% to 70 or 80%, this helps greatly in the summertime and wasn’t a problem at all the rest of the year.

[@ericklein5097]

@@HighTechLabare these bidirectional power supplies or are you able to sink that huge of a load with some massive DC electronic load you have?

[@hoocli]

Still waiting for your video on showing how to connect 4 batteries to a solark. You showed a video racking but never went past that :(

[@HighTechLab]

Coming on the CurrentConnected channel soon. We paused that because now the racks are 5 slot racks and we need to make an updated video with the bigger rack.

[@hoocli]

@@HighTechLab fair enough lol, I'm doing the install this week so was hoping for it

[@HighTechLab]

@@hoocli video is posted!

[@hoocli]

@@HighTechLab thank you!

[@richardhulbert9833]

@@HighTechLab That one we are waiting for, we just bought your 5-rack system to connect with a 15kw Sol-ark. a lot to take in when it is your first attempt at off grid do not want to make any errors.

[@mdunbar04]

What's the breaker on front of the battery rated at?

[@HighTechLab]

125A

[@offgridwanabe]

High Tech Lab with a finger test for temperature lol

[@HighTechLab]

I need a thermal camera

[@offgridwanabe]

@@HighTechLab Nothing personal just thought it was funny. Keep up the great videos.

[@Sylvan_dB]

There is many an electronics technician with finger burns shaped like logos or circuit board components. Humans have been using touch to test temperature for so many millennia we will keep doing it, even when we know we shouldn't.

[@HighTechLab]

@@Sylvan_dB I’ve had MOSFET shape burns on my fingers many times! Sometimes it’s not checking to see something is hot either, you just happen to discover that is very hot!

[@randacnam7321]

@@HighTechLab The low deep IR emissivity of the plated metal will cause accuracy problems with thermal cameras.

[@SolarDrew]

Whats the model of the power supply?

[@HighTechLab]

HP/Agilent 6671A

[@HighTechLab]

They are the BEST for top balancing LFP cell @ 3.65v, get it done in a hurry!

[@niktak1114]

Looks like it can handle the full current of a stack of 4. 5 might be pushing it.

[@HighTechLab]

Perhaps...but a stack of 5 may have other issues pushing full current...4/0 is about as big of a wire as is practical, and it's not rated for much over 400a either.

[@niktak1114]

@@HighTechLab Good point. If I needed full output from a stack of 5 I'd probably just make a long busbar to go across all the terminals.

[@rustusandroid]

The bus bar is fine... People complain about the stupidest things. More importantly, $1800 PLUS SHIPPING on a 100ah battery is ridiculous.

[@HighTechLab]

For 5 kWh? That’s pretty cheap for LiFePO4

[@oldtimeengineer26]

I would say your weakest and hotest point is the connectors on the floor

[@igorkvachun3572]

Yes👍🔋 ⚡🔌💡

[@benjones8977]

I’ve never seen anybody put two lugs on the front of their battery before! Why would you be doing this?

[@HighTechLab]

Because you have a rack of batteries stacked (daisy chained) and need to go from one battery to the next

[@benjones8977]

@@HighTechLab That’s not the way I’ve seen them connected. It’s one positive too one battery to the other. With positive being on the top of the rack and the negative on the bottom.

[@hi-tech-guy-1823]

For me i would be using Bus bars Not cables

[@austinfarley4971]

I don't even know how I got here. Thank YT Algorithm. Still interesting to watch though!

[@JonOffgrid]

wow

[@NeverTalkToCops1]

A risky procedure!

[@johnlupo3919]

STOP SAYING "HERE" & "SO"!!!!!!!!!!!! WE KNOW IT'S HERE (you are pointing right at it)!!!!!!!