Getting 50W from 8x400W panels on EG4 6kxp

[D. Abineri]

I am sure I have a setting wrong somewhere? I have 8x400W hyperion panels feeding the EG4 6K xp inverter, a diy 48V LiFePo battery and a JK inverter bms. Currently, in full sun I am getting about 50W. I Have disconnected the other 8 panels from the second mppt so that I can test each mppt. Pics attached. Can anyone advise as to what my issue might be and what to do about it? What setting might be preventing the solar from responding to the load like this? I am grid tied but not feeding to the grid.
Thanks.

 

[Solar Guppy]

You need a load for solar to produce power, if the inverter is not allowed to send energy to the grid, that only leaves the batteries. What is the SOC of your battery? Best guess its near full and you just have the idle load of the inverter?

 

[Texas-Mark]

What is the SOC of your battery?

His chart (first pic) says 70%

But we do need to know the charge settings.

 

[D. Abineri]

Plenty of load but the grid is picking up most of it instead of the the solar being used. Charge settings here, no generator.
Thanks.

 

[D. Abineri]

You need a load for solar to produce power, if the inverter is not allowed to send energy to the grid, that only leaves the batteries. What is the SOC of your battery? Best guess its near full and you just have the idle load of the inverter?

That's my question, What would be telling the inverter to let the grid pick up the load intead of the solar?
Thanks

 

[ScrotpusGobbleBottom]

Its the jk bms throwing discharge flags I would bet.

I have the same setup. When the jk bms reports 100%. the 6000xp interprets this as BAD. Its stops charge and discharge. Its horrible. You cant use battery even tho its at 100%.
I know this isnt specificly your problem, but you need to know this. The JK BMS will almost never fully charge your battery because it says 100% when its not at 100.

 

[D. Abineri]

Its the jk bms throwing discharge flags I would bet.

I have the same setup. When the jk bms reports 100%. the 6000xp interprets this as BAD. Its stops charge and discharge. Its horrible. You cant use battery even tho its at 100%.
I know this isnt specificly your problem, but you need to know this. The JK BMS will almost never fully charge your battery because it says 100% when its not at 100.

I don't have any lnk between the JK BMS and the inverter. Is it possible to link them? How do I connect the two, in detail please.
Thanks

 

[doityourself2021]

That's my question, What would be telling the inverter to let the grid pick up the load intead of the solar?
Thanks

Hello D,
Yes it is a setting,, now I am not familar with the specific Controller your using.. A few questions.. are you just connected to the Grid for Charging or are you also doing net energy back to grid.. B. If you turn off the Grid Tie, then what happens.. with out myself looking at config of the unit, it appears your dealing with "Priority Settings",, One thing at a time.. Breaker the Grid, and Breaker the Solar, lets see what happens. the Controller should then see only the Battery for "Load", then say you have a 1000watt Load to the House and you only have 800watt PV solar, Only the Battery, online with the Solar, No Grid, you should see the Battery and Solar feeding the Load to the house.. Give us a little more details on the above and what happens..
If you already have done this.. sorry I missed it.. Summary, unless your BMS has a setting "not to Discharge", then the next thing is to look at BMS settings, have to have software with laptop.. Give us more info.. plz.. I m sure someone who has your controller will have the answer or config you need. I say its settings, and priority.. regards, Ric

 

[doityourself2021]

I don't have any lnk between the JK BMS and the inverter. Is it possible to link them? How do I connect the two, in detail please.
Thanks

D, my advise is worth what you pay for it, lol a little dry humor. Advise One Step at a time.. hooking up the BMS to the Battery will not fix the Grid Only use, First my advice, get the Controller to work with the Battery, and correct settings, then BMS the Battery to the Controller, At moment what your saying is You do not have the Battery BMS connected to the Controller.., you have the Battery connected to the Controller and the Grid to the Controller,, Ok, so Breaker the Grid, the controller should see the Battery as the only source, and put a load on the house with your Grid Off line, Just Solar and see what the SA shows you.. in PV generation,, Then turn off the PV Solar breaker and Grid, the Controller should go to the Battery and show Battery Discharge.. . Also if your using Solar Assistant, and you have a USB to rs485 device, you can connect it to the SA and forget the Controller, you will get more details of the BMS Battery.. ..
Again one thing at a time..need more feed back,
A. Turn Grid Off, and Solar PV panels. Just Battery, the Controller should provide the Load for the house and the LCDisplay should show you the
battery -14.6 amp discharge and battery volts, this is an Example I put here..
B. let us know what you get ??
C. Then leave Grid off line, put PV online - let us know what you get on Controller Display,, It looks like your using Solar Assistant ??
D. Then if you put Grid back online, currently from what you said the controller Just uses the Grid, to supply load
Need more info from you..

 

[doityourself2021]

That's my question, What would be telling the inverter to let the grid pick up the load intead of the solar?
Thanks

Config and Setting, best quess

 

[ScrotpusGobbleBottom]

Is it possible to link them

yes. but its not worth it.

 

[Suijkerbuijk]

Just adjust the float charger to higher volts.
I see a lot of people have that problem .
Even i have the same problem.
I have to set the float charger on 13.6 volts or i have not a 100 soc.
Even if the boost go up to 14.2 volts .
If is set 13.4/13.5 volts i have sock around 70/80% .

Some bms just need a little more juice to set it to 100%
3.3.75volt cell on 13.5 volts
3.4 volt cell on 13.6volt
Think that some bms than internal reset to 100%

 

[ScrotpusGobbleBottom]

I am now thinking you are not using the lead acid setting on the inverter.
If you select lithium battery, and at the same time have no link between BMS and inverter, It will NOT USE BATTERY

You need to use the lead acid battery setting if you are not using the link.

You cannot select lithium battery without the link.

 

[GXMnow]

Your battery voltage was showing at 52.6 volts.

Your charge settings are set for "Lead Acid" with a float voltage of 52 volts.

The voltage will only hit 53 volts, then the current will drop back until the voltage falls below 52 volts. You are in float mode.

For a 16S LFP battery, the Bulk voltage should be around 55 volts. The float voltage at 52 is ok. But unless the battery is pulled down to that, you won't get charge current.

As for the solar not powering loads, you need to check other settings. Does it have things like "priority" with 3 letter codes? "SBU" is a common code for Solar first, then Battery, then Utility. If you are in any setting starting with a "U", then it is Utility first. The "U" first modes are typically to act like a big UPS that will only kick in if the grid fails.

 

[doityourself2021]

D, Please take the time to look at this settngs via U tube, and pay attention to Settng #11 and what is being explained.
here it the link

 

[Recovering EE]

Hello D,
Yes it is a setting,, now I am not familar with the specific Controller your using.. A few questions.. are you just connected to the Grid for Charging or are you also doing net energy back to grid.. B. If you turn off the Grid Tie, then what happens.. with out myself looking at config of the unit, it appears your dealing with "Priority Settings",, One thing at a time.. Breaker the Grid, and Breaker the Solar, lets see what happens. the Controller should then see only the Battery for "Load", then say you have a 1000watt Load to the House and you only have 800watt PV solar, Only the Battery, online with the Solar, No Grid, you should see the Battery and Solar feeding the Load to the house.. Give us a little more details on the above and what happens..
If you already have done this.. sorry I missed it.. Summary, unless your BMS has a setting "not to Discharge", then the next thing is to look at BMS settings, have to have software with laptop.. Give us more info.. plz.. I m sure someone who has your controller will have the answer or config you need. I say its settings, and priority.. regards, Ric

The 6000XP is an off-grid inverter. It won't export to the grid.

 

[D. Abineri]

I am on-grid but NOT feeding the grid, just trying to reduce my electric bill. I have the 8x400W panels connected to one mppt and have temporarily disconnected the other 3200W string from the other mttp so as to test each separately. The battery is slowly discharging during these pics.

Yes, I am looking for the setting that is causing this situation.
Thanks

 

[ksmithaz1]

It's your battery settings, you are using L/A numbers for a LifePO battery You might try settings more like:
Battery Type: Lead-Acid
Charge Voltage: 53 -> 56V (55.8? keep pushing until it works)
Float Voltage: 54 (ish)
Equalization Voltage: 56.5-57v maybe?
Eq time: 1 hour should be enough

Plenty of forum discussion on this in the battery threads. Assuming 16s strings.

 

[ksmithaz1]

Bump your cutoffs up over 50v as well.

 

[doityourself2021]

When you say its "Not Worth" to link Them" what are you meaning, by It and Them..

 

[doityourself2021]

Is there not a setting for LifePo battery No BMS ? again your getting some good advice on settings.. I m not going to be much help, don't want to crowd the subject..

 

[D. Abineri]

D, my advise is worth what you pay for it, lol a little dry humor. Advise One Step at a time.. hooking up the BMS to the Battery will not fix the Grid Only use, First my advice, get the Controller to work with the Battery, and correct settings, then BMS the Battery to the Controller, At moment what your saying is You do not have the Battery BMS connected to the Controller.., you have the Battery connected to the Controller and the Grid to the Controller,, Ok, so Breaker the Grid, the controller should see the Battery as the only source, and put a load on the house with your Grid Off line, Just Solar and see what the SA shows you.. in PV generation,, Then turn off the PV Solar breaker and Grid, the Controller should go to the Battery and show Battery Discharge.. . Also if your using Solar Assistant, and you have a USB to rs485 device, you can connect it to the SA and forget the Controller, you will get more details of the BMS Battery.. ..
Again one thing at a time..need more feed back,
A. Turn Grid Off, and Solar PV panels. Just Battery, the Controller should provide the Load for the house and the LCDisplay should show you the
battery -14.6 amp discharge and battery volts, this is an Example I put here..
B. let us know what you get ??
C. Then leave Grid off line, put PV online - let us know what you get on Controller Display,, It looks like your using Solar Assistant ??
D. Then if you put Grid back online, currently from what you said the controller Just uses the Grid, to supply load
Need more info from you..

I think, if I disconnect the 240V input to the inverter, then the inverter will be off and won't see anything.

 

[D. Abineri]

Config and Setting, best quess

Yes, looking for a setting that would cause this.

 

[doityourself2021]

D.. if your battery is connected to the Controller (what you call inverter) again not familar with EG4 unit you have. But it should not turn off.. it should not need Grid connection to Operate. just the battery..

 

[D. Abineri]

When you say its "Not Worth" to link Them" what are you meaning, by It and Them..

I don't believe I said that. I have disconnected one 8s string from one mppt in order to test them one at a time. I have a total of two 8s strings when all are connected to the inverter.

Thanks