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Posted

Hi All. 

Please assist. I have 6x450poly and 4x540mono panels on roof, 2x Ultra energy 4800 lithium batteries and 1xgrowatt es5000 inverter. First install was everything aside from tehe4x540 panels. everything work fair, wasn't entirely satisfied that the installer knew the settings, but he got it to work. last week I had the 4x540 panels installed. Worked ok, but then issues started to arise. batteries would run dead and utilities wouldn't kick in. Error code 19 comes up. Batteries was once overcharging and was not cutting off. Blew one of the two solar fuses. Had them replaced. The 160amp blade fuses melted the housing, had that replaced. Something doesn't seem right. Does anybody know the settings that will work with these panels and batteries. 

Posted (edited)

How are your panels configured in terms of series and parallel.
You have two types of panels with differing voltages and amps which are ending in parallel on your inverter.
The Inverter only has a single MPPT, thus even if the solar panels are configured "optimally" you will always have losses to a lesser or greater extent.
What is the max charge rate for your batteries and what are your inverter settings? Do you have a technical spec sheet for those batteries?

https://www.explorist.life/using-mismatched-solar-panel-sizes/

 

Edited by zsde
Posted

Panels connected in two strings then one cable from the roof. Not sure if this is correct. Charge rate is 20amps and teh inverter is set to that. Today the charge stayed around 6w even in sun. batteries are not charging. Not sure if a firmware issue

Posted
1 hour ago, Kamlesh said:

Panels connected in two strings then one cable from the roof. Not sure if this is correct. Charge rate is 20amps and teh inverter is set to that. Today the charge stayed around 6w even in sun. batteries are not charging. Not sure if a firmware issue

As you indicated a panel fuse blew with 2 parallel string it is to be expected if the fuse was 20A.

Both panels could be Vfullpower of 40V. Thus one string could provide 10A and the new 13A. The problem comes, in that the new set of 4 will pull the 6 down as if the 1st set is also only 4 panels.  This statement is based on a calculated guess but you should not have the problems you have had.

More detail of how everything is connected as well as the spec of the panels is the bare minimum for guys to be able to help.

Shocking installation it seems. Batteries should not over charge or 160A fuses blowing but I don't know the Growatt inverter and other will be able to help.

 

Posted

Perhaps state every Setting in your program on the inverter from 01 thru to 21 in order to understand what your inverter has been programmed to do.
Then your battery technical specs are needed to see how that correlates with how your inverter has been set.
 

 

Posted

Setting.

1. sbu, 2. 20amps, 3. apl, 4.dis, 5.us2, 6.ena, 7.dis, 8.230v, 9. 50, 10.4, 11. 20, 12.46.0v, 13.54v, 14.cso, 15. Off, 16.on, 17. Off, 18. Ena, 19.56.4, 20. 54v, 21. 42v

 

Posted

You don't have any tech specs for the batteries? Do those batteries have no BMS?

Also I see you are using SBU, i.e. it will drain your batteries first before using Utility power. 

Posted

Batteries do have a BMS, but it does not seem to communicate with the inverter, I noticed this when the battery percentage shows different to inverter, also, I cannot select li on setting 5. Which specs you need for the battery. I know it 20amp max charge. As it’s set, when the load on the house increases, like when I use a kettle, the utilities kick in. Can this be set to a higher value so that batteries get used first. I have two batteries at 4.8 each.

Posted

Without BMS comms you won't be able to select Li.
If you don't have the tech specs, then where did you find the max charge rate of 20A which seems pretty low for a Lithium battery. Seeing that you have 2 batteries in parallel, the 20A should allow you to charge and discharge at 40A setting on the inverter.
The full tech specs should also be able to provide you with the CAN pin out configuration/definition which would then allow you to make up a cable for the BMS comms.
Here is an example of the Hubble and Growatt comms cable. The Battery manufacturer or your installer should be able to give you this info. 
image.png.1ac7d5e6575d3a967ff590da8bb93895.png 

Posted (edited)

So the only local place I could find selling these "Ultra Energy" is https://gasolar.co.za/product/ultra-energy-5-1kwh-wall-mount-lithium-ion-battery/
Ideally one would want to get the tech specs from the manufacturer. But I have not been able to find their info.
On the sellers website the data contradicts that which is on the battery, as yours is a 4800 and this one is advertised as a 5100
The good news is they claim CAN Bus comms. So perhaps you can contact them to get the pin out for the battery then you can have a comms cable made up. 

In the meantime, using the specs on the battery label, you can set setting 02 and 11 to 40Amps as you have 2 parallel batteries, setting 19 to 56V, setting 21 to 44V.
 

image.png.0ec99e90829aaa136c7e4f712c6c0222.png

Edited by zsde
Posted (edited)

Those are 48V batteries and you have a 48V inverter. They can't be in series else you would have 96V. 
Are your inter battery comms cables hidden inside the trunking as I don't see any in this pic


 

Edited by zsde
Posted

Thanks, didn't see them in the first pic.
See if you can get the pin outs for the comms to the Growatt to get the BMS interface going.
In the meantime you can set setting 02 and 11 to 40Amps as you have 2 parallel batteries, setting 19 to 56V, setting 21 to 44V.

Posted

Thanks ZSDE, you have been most helpful. I called the guy I bought the batteries from and he has no clue what the pin outs are and neither is there a manual in the box. I don’t know how else to get the pin outs.

Posted

Perhaps someone on the forum knows how to determine which pins on the battery are the needed ground, CANH and CANL pins. 
@Coulomb may know of a smart way of finding the correct pins? 

Posted
1 minute ago, zsde said:

Perhaps someone on the forum knows how to determine which pins on the battery are the needed ground, CANH and CANL pins. 
@Coulomb may know of a smart way of finding the correct pins? 

Those batteries seem to be RS485 only, so there will not be any CANH/CANL pins. The specs on them also differ from the ones you posted.

Posted
13 minutes ago, P1000 said:

Those batteries seem to be RS485 only, so there will not be any CANH/CANL pins. The specs on them also differ from the ones you posted.

I believe I did point that out in an earlier post. So he is aware of that.

"On the sellers website the data contradicts that which is on the battery, as yours is a 4800 and this one is advertised as a 5100"
 

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