ECO-WORTHY 48V 100Ah 5120Wh LiFePO4 Server Rack Battery

[Will Prowse]

I feel beat up but I was honest I did get more after balancing and opening up the BMS capacity where it wouldn't stop the discharge. The BMS also stops full charge by counting coulombs and unless altered stops at 80% or LV Disconnect.

I take all welded server rack batteries and run them up to 3.650V/Cell with an external power supply and active balancer. Saves days if not weeks off the process. No need to install one once everybody is happily top balanced.

After many cycles the E-W is keeping up with the Vatrer and LP4V1 (<2%) so it was a nice reasonably priced battery to add to my system.

I am not in a YouTube competition so no need to post anything there. I had a lot of fun at a reasonable price and they are working just fine. Looking forward to the 6 rack unit where I can add one more to my collection.

Thank you for posting the cell data sheet!!

 

[BarracudaBob]

Oh no worries! I didn't mean to do that at all. No matter what I always have to question all information available to me on the forum and on the internet. It was very helpful all the data that you posted.

What capacity test results are you getting with the vatrer? I'm testing those right now.

Oh I don't see you as competition haha I'm just trying to find problems with it. When people like a product, I make it my mission to find something wrong.

I kept it real so the data is hidden in the threads. There was 2-3 Vatrer threads. I'll have to find it. The cells did balance easier in the beginning on the VTR. The E-W did need to charge up and discharge way down to line up. I love my active balancer. Every newbee goes through the process.

 

[Rmart30]

Thanks for doing this review Will. Looking forward to the VATRER server rack video.

 

[BarracudaBob]

I'm searching through the threads. On the Vatrer we had a few of us with questionable BMS settings here

 

[BarracudaBob]

Thanks for doing this review Will. Looking forward to the VATRER server rack video.

FIY they also had the shipping issue

 

[BarracudaBob]

Thank you for posting the cell data sheet!!

They were buried in the thread. Need to start an index

 

[Brucey]

Good video Will. The only thing I’m curious about, is why you pronounce Vatrer like it’s a French word.

I imagine he pronounces it like this:

 

[BarracudaBob]

Vatrer test results here

So after comparing the E-W to the VTR and price I chose to buy more E-W.

 

[Will Prowse]

FIY they also had the shipping issue
View attachment 274069

Now this is what I'm looking for! Earlier when I asked in this thread if anyone was having issues, I'm always looking for things like this. Awesome

 

[rauan1]

55.6 / 16 cells = 3.475 volts.
Using the ECO-Worth provided software (after you click Account and User login upper right of screen; password is 666888) you can adjust the "Balance Voltage" setpoint in the BMS. This is the voltage a cell needs to reach before Cell balancing starts.

Default Cell Over Voltage Protection is 3.60 volts, you do not want a cell to reach this as the BMS will stop further charging. You can set the "Balance Voltage" to something lower than what cell #11 is charging to and hopefully the BMS will start balancing that cell which should slow further charging for that cell while allowing the other to continue charging.

Some folks including @BarracudaBob have lowered this (raised back to default once battery has been conditioned) to allow the BMS to start balancing the cells that reach a higher voltage.

Before making any adjustments to BMS configuration or parameters "Read" them and then "Export" them. In addition as a backup take a screenshot of each page and save it as well.

Where can I find the balance voltage parameter to lower it to better balance my cells?

 

[BarracudaBob]

Here is the question that Will is always calling me out on but if you hear out the logic it is undisputable. Will even agreed on a balance thread.

You get a new welded cell battery. It isn't top balanced at 3.650V per cell. You can't get there to do it because the BMS will over voltage way before you can. After 2 years messing with the popular "Beta Box" I figured it out.

Warning: For advanced users!

Charge the battery up to 54.4V normally
Turn the BMS off
Put an active balancer on the cells
Put a low current power supply up slowly until you get all the cells to 3.650V and let it sit for as long as you can supervised.
After top balancing every cell for a couple of supervised hours (like on the kitchen table). I turn it off and let them settle down.

I then discharge it as low as it will go. I charge it to the top that the BMS will allow and stick it in service.

I do this with an external inverter and run a charge-verter to put the energy back into my main battery bank so I don't waste any Coulombs

Trouble free and it is balanced and happy.

Barracuda Bobster New Battery Top Balance Procedure.

 

[BarracudaBob]

Now this is what I'm looking for! Earlier when I asked in this thread if anyone was having issues, I'm always looking for things like this. Awesome

E-W has made changes to their packaging so most of the issues are resolved but there is nothing you can do with a crazy FedUp delivery man!

 

[marionw]

Here is the question that Will is always calling me out on but if you hear out the logic it is undisputable. Will even agreed on a balance thread.

You get a new welded cell battery. It isn't top balanced at 3.650V per cell. You can't get there to do it because the BMS will over voltage way before you can. After 2 years messing with the popular "Beta Box" I figured it out.

Warning: For advanced users!

Charge the battery up to 54.4V normally
Turn the BMS off
Put an active balancer on the cells
Put a low current power supply up slowly until you get all the cells to 3.650V and let it sit for as long as you can supervised.
After top balancing every cell for a couple of supervised hours. I turn it off and let them settle down.

I then discharge it as low as it will go. I charge it to the top that the BMS will allow and stick it in service.

I do this with an external inverter and run a chargeverter to put the energy back into my main battery bank so I don't waste any Coulombs

Trouble free and it is balanced and happy.

Barracuda Bobster New Battery Topo Balance Procedure.

If only the battery manufacturers would add a connector to the faceplate of the battery that gives you access to all balance leads. They could even offer an active balancer that would plug into this connector. We could at least, given the pinout spec, build our own pigtails specific to our balancer and the connector pinout

 

[marionw]

E-W has made changes to their packaging so most of the issues are resolved but there is nothing you can do with a crazy FedUp delivery man!

The two remaining issues:
1) Lack of complete documentation for the JBD communications protocol.
2) Whether the RS232 connection on the "Master" battery allows access to data from all connected batteries.

 

[BarracudaBob]

If only the battery manufacturers would add a connector to the faceplate of the battery that gives yuo access to all balance leads. They could even offer an active balancer that would plug into this connector. We could at least, given the pinout spec, build our own pigtails specific to our balancer and the connector pinout

Most MFG don't want to give you access. I really believe in this procedure and ask if anybody has any suggestions to make it more clear and usefull. This isn't for somone with one or two batteries. I have a significant investment and want to take care of it. If something isn't operating properly the $100 bucks for a active balancer and a power supply is so more valuable to me than the aggravation of it not being at its best operating conditions.

Battery be the best you can be!

 

[BarracudaBob]

Vatrer test results here

So after comparing the E-W to the VTR and price I chose to buy more E-W.

Here is live data I just took off Solar assistant. Vatrer on left and E-W V2 on right. Note I programmed more info on the BMS with the windows software

 

[BarracudaBob]

The tow remaining issues:
1) Lack of complete documentation for the JBD communications protocol.
2) Whether the RS232 connection on the "Master" battery allows access to data from all connected batteries.

I don't disagree but E-W doesn't make the BMS so that is on JBD. The RS232 on V2 works with windows but Solar Assistant and others haven't caught up yet. It will only get better.

 

[Will Prowse]

In 2021 I tested one of the first 24V EG4 server rack packs and it pulled barely over 200Ah. If I'm not mistaken these are also rept cells. They use different cells now:

 

[BarracudaBob]

out of the box without cycleing a few times the E-W will not be at full capacity. It does take a couple of deep charge/discharge cycles to come to life.

Out of the box the VTR will beat the E-W by a few present.

That is why there is a BBob procedure... Lets get on with it. You have work to do!

 

[BarracudaBob]

In 2021 I tested one of the first 24V EG4 server rack packs and it pulled barely over 200Ah. If I'm not mistaken these are also rept cells. They use different cells now:

View attachment 274091

Wow, surprised it didn't go higher. I will say that the larger cells will preform better under high C rates. I never went over 25A charge/discharge.

 

[JoeHam]

Put notices above toilets of somebody doing something stupid and don't let that be you.

Evidently this is an issue in Japan but I did see one of these signs on a day cruise ship out of San Diego

Back on topic now, he started it Mom !

 

[marionw]

I don't disagree but E-W doesn't make the BMS so that is on JBD. The RS232 on V2 works with windows but Solar Assistant and others haven't caught up yet. It will only get better.

Can you see all batteries of just the one you are plugged into?

 

[Brucey]

Evidently this is an issue in Japan but I did see one of these signs on a day cruise ship out of San Diego

Back on topic now, he started it Mom !

 

[42OhmsPA]

Here is the question that Will is always calling me out on but if you hear out the logic it is undisputable. Will even agreed on a balance thread.

You get a new welded cell battery. It isn't top balanced at 3.650V per cell. You can't get there to do it because the BMS will over voltage way before you can. After 2 years messing with the popular "Beta Box" I figured it out.

Warning: For advanced users!

Charge the battery up to 54.4V normally
Turn the BMS off
Put an active balancer on the cells
Put a low current power supply up slowly until you get all the cells to 3.650V and let it sit for as long as you can supervised.
After top balancing every cell for a couple of supervised hours (like on the kitchen table). I turn it off and let them settle down.

I then discharge it as low as it will go. I charge it to the top that the BMS will allow and stick it in service.

I do this with an external inverter and run a charge-verter to put the energy back into my main battery bank so I don't waste any Coulombs

Trouble free and it is balanced and happy.

Barracuda Bobster New Battery Top Balance Procedure.

I remember that journey well.

 

[doox00]

For those that do not know you can also build a 306 ah battery with brand new mb30 cells and a diy server rack case with jk bms and screen for about 1700 shipped, I just ordered and received 2 more of these a few weeks ago. I have 4 of the Yixiang diy cases and mb30 cells and 2 of the gobel power diy cases and mb 30 cells. I paid 3400 shipped for most recent 2 diy cases and 32 mb30 cells, takes about an hour to throw it all together.