marionw
Solar Wizard
For most batteries/BMS, the protocol selection is only for the BMS to Inverter closed loop communications. The battery to battery protocol is fixed and usually proprietary to the BMS manufacturer.
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Server Rack Eco-Worthy 48v 100ah and EG4 6000xp comms.
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BarracudaBob
Harvesting free photons from clean fusion
Some of these batteries are proprietary but almost everybody's opened up to all the different protocols The cat's out of the bag.
The ones that are locked down on their proprietary protocol are going to be the ones people going to stop buying.
mmmmmdonuts
New Member
So I have been reading various threads on the eco-worthy server rack battery and eg4 6000XP and I just have an overall question on the communication. Does it work with the 6000XP in closed communication with just one of the server rack batteries? It seems the issue is when you have multiple batteries in parallel for closed communication? Is this the case?
BarracudaBob
Harvesting free photons from clean fusion
The master battery CAN bus output acts like one large battery. If you have 4 E-W batteries plugged into the master CAN it will output as one 400ah battery.
It can do numerous protocols by Pylon is the default and most accepted. It is not compatible with EG4 batteries but Inverters yes.
mmmmmdonuts
New Member
Thank you. That is extremely helpful. So the inverters can do closed loop communications with it and it is largely just plug and play then?
I just got 6 new EW server rack and my 6000xp only charges at 54.7v. But it does get to 100% charged. I cant get it to 56.6V.
For 6000xp in the Monitor setting for Lithium type what are you guys setting it to? Choice is 0 to 21 in the EG4 site on compatibility list it does not show the EW battery
Im connected via Pylon in the EW app.
What's a target first charge of a new battery other than 100%? Im charging each one at a time.
For 6000xp in the Monitor setting for Lithium type what are you guys setting it to? Choice is 0 to 21 in the EG4 site on compatibility list it does not show the EW battery
Im connected via Pylon in the EW app.
What's a target first charge of a new battery other than 100%? Im charging each one at a time.
BarracudaBob
Harvesting free photons from clean fusion
After many cycles and everything balanced perfectly 56.8V is the BMS 100% reset voltage on the EW. I change mine to match the EG4 LP4 V1 with the latest firmware to 56.6V.
The first couple of times charge it and not everything is 'broke in' and balanced you need to get it to 55.2V and above and hold it there for a while. That puts it at 3.45/cell so the BMS passive balancer will start.
Because I am impatient and want to top balance every cell I use my external active balancer on every new battery. This drives Will crazy but it works really good.
Top Balancing welded cell batteries
The first couple of times charge it and not everything is 'broke in' and balanced you need to get it to 55.2V and above and hold it there for a while. That puts it at 3.45/cell so the BMS passive balancer will start.
Because I am impatient and want to top balance every cell I use my external active balancer on every new battery. This drives Will crazy but it works really good.
Top Balancing welded cell batteries
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Thanks for fast reply. Im 100% off grid and need set up quick.
Charging my 2nd battery it did ramp up to 55.7 at 99% Then jumped to 54.7 when it hit 100%
What do you think an actable voltage difference between cells is?
I will for sure get a active balancer like you have. Is there any time frame is good to go back in and do a balance?
BarracudaBob
Harvesting free photons from clean fusion
Many say don't worry about it but I like them within 50mV or better. Once you get them balanced they will stay balanced as long as you hit the 56.6V mark every now and then and hold it.
You can operate the batteries at a lower voltage where the imbalance doesn't show up and you will be fine. The batteries at 100 present capacity and top balancing are two different things. I don't like for some batteries to alarm out and disconnect and never reach the top knee voltages. That is why I top balance it with an external balancer.
Others will tell you don't worry about it the capacity is there and just use it.
BarracudaBob
Harvesting free photons from clean fusion
Giving you both points of view. Mine is to get everything nearly perfect
And the other
Exactly
people over think this. Just use the battery.
And the other
Exactly
people over think this. Just use the battery.
BarracudaBob
Harvesting free photons from clean fusion
For the E-W rack batteries I would use the Pylon CAN Buss from the master battery set as No. 1 and all the slaves connect as it says in the manual.
The master will report one really big battery via the CAN.
So select number two for pylon? And I understand the dip switches in Manuel.
BarracudaBob
Harvesting free photons from clean fusion
That is what it looks like on your paperwork. Pylon CAN is your ticket
Thanks for the help. I got 3 topped of and 3 to go then put all together.
Is there a safer sequence on how to turn on all these with the inverter?
BarracudaBob
Harvesting free photons from clean fusion
you want all their voltages to be the same (or extremely close)
I prefer to have everything at 100% and let them calm down for a little while then start flipping breakers on. Never had an issue.
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