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Have MPP's DON'T buy EG4's

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OleMan2765

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Have two MPP LV6548 inverters.
Had three Husky BigBatteries.

Problems with Husky's is you can't see the BMS.
One Husky caught fire.

My System supplier graciously bought back the three, and sold me 6 EG4 LL series.

The cat's meow. Actually, they are what comes out of the other end of the Cat.

No support to speak of.

I have to run a generator every day.

The Husky's were 100a version. Maybe with three or four days of overcast weather here in N Florida, I might need to run my generator.

With 6 mind you 6 EG4's that are also 100a, can't make a single day.

AVOID...
 
So you doubled battery capacity and are getting less run time. Sounds like there is a problem with the charging set up on the inverters or your solar array is much too small for the desired amount of power consumed. Assuming you meant 100Ah not 100A.

The new batteries need to be charged to 100% at a minimum voltage of 55.2 until the current drops off to a few amps.
 
Not sure what closed loop is.
I do have the green cables attached.

Can not get the RJ45 to USB cable to work either.

Have to look at each screen to see anything.

Running generator, I can grt top battery to 100%, SOC, then generator drops to an idle.
Other 5 EG4's are about 75% and thats it.
 
BentleyJ said:
So you doubled battery capacity and are getting less run time. Sounds like there is a problem with the charging set up on the inverters or your solar array is much too small for the desired amount of power consumed. Assuming you meant 100Ah not 100A.

The new batteries need to be charged to 100% at a minimum voltage of 55.2 until the current drops off to a few amps.
Click to expand...
Have 6180W of panels. Would love more, but that is what I have.
 
OleMan2765 said:
When I first received the batteries, SOC was less than 50%. I charged each one to 100%. That was the last time they were all equal.
Click to expand...
100% only means one cell in each battery hit the charged voltage.
If you multiply that by 6,that could be your problem.
i imagine once one battery hits 100% charging stops for all of them.
You simply found the battery with the worst balance problem.
 
I know nothing about the EG4 LL batteries. Several of my neighbors do use them and they’ve been flawless for them.

Could the issue be a loose connection? A bad crimp? Is your gear configured correctly to charge these batteries?

Have you checked all connections top to bottom?

Good luck finding the culprit!
 
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ScropusGobbleBottom said:
100% only means one cell in each battery hit the charged voltage.
If you multiply that by 6,that could be your problem.
i imagine once one battery hits 100% charging stops for all of them.
You simply found the battery with the worst balance problem.
Click to expand...
16 cells in each battery. All 6 batteries cells are at 3.26 to 3.24V.
Only the top, or first battery gets to 100%.
As you go lower in the rack, they are all around 65 to 70%.
 
wheelman55 said:
I know nothing about the EG4 LL batteries. Several of my neighbors do use them and they’ve been flawless for them.

Could the issue be a loose connection? A bad crimp? Is your gear configured correctly to charge these batteries?

Have you checked all connections top to bottom?

Good luck finding the culprit!
Click to expand...
EG4 requires all battery connections to be torqued.
All the battery cables came from EG4.
Guess I could find a Megger, and test each wire.
 
Sounds like you aren't running your + and - from opposite ends of the stack. Techncially with 6 batteries I think you want to run one from second from top and the other from second-to-bottom unless you want to get into a more complicated wiring arrangement.
 
OleMan2765 said:
16 cells in each battery. All 6 batteries cells are at 3.26 to 3.24V.
Only the top, or first battery gets to 100%.
As you go lower in the rack, they are all around 65 to 70%.
Click to expand...
3.26 isn’t 100% charged. It could be anywhere from about 40% to 90%, but not 100%. I wonder if you’re not getting all (or any) of your batteries fully charged.
OleMan2765 said:
Running generator, I can grt top battery to 100%, SOC, then generator drops to an idle.
Click to expand...
When you’re charging with the generator and it drops to an idle, what’s the battery voltage right before that happens, and what’s the voltage of the highest cell in any pack?
 
Which husky battery did you have? The “original husky” or the “husky 2” in 48vdc 100ah?
What caused the fire? Was it the anderson plug?

Nice of them to swap out…hmmm can you elaborate on the fire?

IMG_7271.jpeg

I find this hard to imagine for a report vs what has maybe changed from one to the other.
The dual 6548 has a high idle consumption just by themselves so what else changed? Does the dual 6548 have the high pv voltage support as they tend have higher idle consumption. 6 each full rack eg4 vs 3 husky ?

So the loads have not changed from the Husky vs the EG4 batteries an apples to aplles and oranges to oranges not an apple to orange thing?

Can you show pictureS of the EG4 batteries and battery wiring all the way to inverters?
 
What are your charge settings? Seems like your batteries are out if balance. Charge to 54.0v, when it gets close, increase by 0.20v until you get to 56.0v without a battery going offline.
 
OleMan2765 said:
Have two MPP LV6548 inverters.
Had three Husky BigBatteries.

Problems with Husky's is you can't see the BMS.
One Husky caught fire.

My System supplier graciously bought back the three, and sold me 6 EG4 LL series.

The cat's meow. Actually, they are what comes out of the other end of the Cat.

No support to speak of.

I have to run a generator every day.

The Husky's were 100a version. Maybe with three or four days of overcast weather here in N Florida, I might need to run my generator.

With 6 mind you 6 EG4's that are also 100a, can't make a single day.

AVOID...
Click to expand...
There is not nearly enough information here. I see above you have 6180W of panels, but what panels and how are things wired, etc.

Agreed, going from 3 -> 6 batteries on (2) 6.5KW AIOs, 15.5KWHR -> 31.2KWHR should have gotten more runtime.

What exactly happened to the Husky battery?

Feels like they aren't getting properly charged, please post pictures of your wiring, and any data you have on SOC from your batteries. 6.2KW of panels and 31KWHR of battery Should work if your load is low enough, but might not be enough to fully charge all the batteries at least once a month.
 
Last edited:
OleMan2765 said:
Not sure what closed loop is.
I do have the green cables attached.

Can not get the RJ45 to USB cable to work either.

Have to look at each screen to see anything.

Running generator, I can grt top battery to 100%, SOC, then generator drops to an idle.
Other 5 EG4's are about 75% and thats it.
Click to expand...
Closed loop is when your inverter is talking to your batteries (probably over the green cables, though specific cables might be required for your specific inverter to talk to those particular batteries), using the right hardware (wires), ports (CAN versus RS-485), protocols (EG4?), and other settings. Plugging in the "green wires" doesn't solve it or tell us anything else.

Unfortunately, there are a few different RJ45 to USB cables, so I don't know how to help.
 
Shimmy said:
Sounds like you aren't running your + and - from opposite ends of the stack. Techncially with 6 batteries I think you want to run one from second from top and the other from second-to-bottom unless you want to get into a more complicated wiring arrangement.
Click to expand...
Just adding some emphasis to this.

If the top battery in the stack is the only one reaching 100%, you have them wired wrong. One main connection at the top and the other at the bottom.
 
It is entirely possible the master battery as suggested is the battery shutting other battery down if up on comm. Bms…. Talking to other bms … they Might not be daisy chained correctly for comm or dip switches set properly. I think in event of no bms comm they should all work independent for individual battery bms in parallel thus if 1 drops out rest keep going independent in parallel. You could try removing ALL battery comm to see if it is effected…. for capacity run charge time. If properly parallel wired to dual 6548s for battery terminals they should work and charge independent for each battery. If that happens for working correctly after all comm removal than we know it is battery comm for bms doing it….shutting down other batteries.

“3-4 days for husky 15k vs 1 day with eg4 30k” is a serious problem. If load is exact same if pv is exact same the new 2x battery should last ot longer then reported. What makes it hard to understand.

Pictures as asked for would help.

This is only thing that makes sense for your report. You only have 1 eg4 battery online if 1 day vs 3-4 days for previous batteries.
IMG_7275.jpeg

Happy 4th
 
I am not seeing where @OleMan2765 stated what EG4 batteries where installed. There are several models and knowing exactly which model is installed is important.

In addition whether the batteries are installed in a rack with bus bars or are connected in some other way is also important.

A picture or two would also help.
 
Before placing the batteries in service did you charge then to 100%. Batteries are normally shipped and received at round 50% SOC which is also not accurate until you fully charge the batteries. The inverter will stop charging when the BMS reports 100% SOC.

You may have to disable BMS comms, use open loop and manage the charge by adjusting the inverters charge voltage while monitoring the batteries with the BMS_Tools software.

Also, are the batteries EG4 LL or EG4 LL-S. There are differences

In addition you can download the monitoring software as well as the latest firmware for your batteries from the EG4 website. Just make sure you download whatever if correct for your batteries.

eg4electronics.com

Downloads - EG4 Electronics

EG4 is dedicated to ensuring that you have access to the most up–to–date product information at all times through our downloads page.
eg4electronics.com eg4electronics.com

You can either get the correct RS485 to USB cable from EG4 or make your own. Just make sure that when you plug the cable into your computer that a serial port is created which indicates you have the correct driver installed and the computer was able to load it.

Some helpful info on building your own cables, just use the RJ45 pinout for your battery:

diysolarforum.com

Help with Pace BMS Comms

Hey, I have a Anenji battery pack. It's a 51.2V100AH battery. It has a Pace BMS but I cannot get any reliable communications with it. The seller sent me a BMS Tools v2.04 which they say should be able to talk to the battery. I'm getting nowhere. I have 3 RS232 cables, 1 from Amazon, 1 from the...
diysolarforum.com diysolarforum.com

diysolarforum.com

query on SRNE reset times.

I have a 3KV SRNE hybrid controller which i monitor with an online datalogger. The info from the datalogger is good, however at 6PM the data for the days' info resets to zero. I am wondering if anyone has the same issues, and would disconnecting/reconnecting: the panels, AC input and the DC...
diysolarforum.com diysolarforum.com
 
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Shimmy said:
Sounds like you aren't running your + and - from opposite ends of the stack. Techncially with 6 batteries I think you want to run one from second from top and the other from second-to-bottom unless you want to get into a more complicated wiring arrangement.
Click to expand...
Did positive top connection, negative bottom right.
Same issues. Moved both positive and negative to mid-point, and get better results.
Just top battery has its way with the others.
Had top battery at 35%SOC, all others 0%SOC.
Waited for system to shut down at 44V.
Then charged system and all batteries were even, only got to 65%SOC on ALL batteries, and ran out of propane on generator.
Next time with more propane, and batteries got out of SYNC again.
 
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