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Growatt Inverter + Pylontech Batteries : BMS Comms Guide

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  • SiliconKid
    SiliconKid

    NOTE TO ALL We have now established that BOTH of the firmware updates that were provided to me by Growatt in China ARE required to get the BMS comms working correctly between the Growatt SPF5000

  • I think some of it has to do with the canbus communications with the battery. In later discussions, it seems these Growatt inverters work fine with the same  battery, as long as you set the settings i

  • For what its worth. I have installed a few growatt inverters with Dyness Batteries. My settings on the ES is Li and protocol 1. Cable that I use is the black cable black boot on the in port on th

Posted Images

hmmm i wonder if it would be at all possible to try the use setting ? and use the manual battery voltages for bulk and float and observe the screen to see what it does ? if the charge line goes away after a few hrs ?

 

2 hours ago, Zimnismoboy34 said:

i wonder if it would be at all possible to try the use setting ?

Of course. But in Axperts, AGM and FLD are just preset voltages for absorb and float; there is nothing special about them.

1 hour ago, Coulomb said:

Of course. But in Axperts, AGM and FLD are just preset voltages for absorb and float; there is nothing special about them.

Hence my thinking that the USE setting has a bug in the code ? As this setting would be concerning custom voltages that are meant to be retained .. but are not due to the charger being turned off worse yet the inverter drains the battery in this mode with no charge up from grid !

Hi, can you please send me the firmware, have been experiencing the same problem since installation where the inverter indicates 100% charged batteries but in reality there is no charging. 

Also can't get the L02 profile, is it same as L2? 

Your assistance will be appreciated. 

Hello Siliconkid,

Will you kindly sent me the 2 firmware you referred to. I followed your instructions to the tee and after making the changes, the inverter is not charging the battery as shown on the picture. Current firmware is 500.07/002.00. My email address is [email protected]. dipswitch was also changed to 1000 and connected the RJ45 to port RS485 and BMS port.

[email protected]

IMG_20200919_145310.jpg

Screenshot_20200920_091531_com.growatt.shinephones.jpg

  • 3 weeks later...

Hi All,

This is a loooong string which I haven't got time to read from start to finish, so forgive me if this question has been asked before.

I have a client with a Growatt SPF5000-P and not the SPF5000TL HVM that this topic started with. I'm not familiar with Growatt. Does anyone know if the setup with Pylontech will be the same as described by @SiliconKid at the start of the topic?

Hi @SiliconKid,

I have 2 Growatt SPF 5000TL HVM-P inverters (parallel) + 2 x Revov UT512 Li Batteries (bridged). I currently do not have Solar connected. Inverter settings have UTL as main power source, Power Saving disabled and battery setting as USR and not LI

I am facing a problem where my batteries will discharge, even though electricity is provided by Eskom. If I manually switch Eskom off and on, then the inverters will start charging the batteries again. The installer did not connect comms cables between batteries and inverters - something about Revov awaiting approval from Growatt

Is the above something that can be fixed by upgrading the Inverter Firmware? Can you please email me the latest firmware updates and also tell me where to get the ISP tool everyone is referring to?

Thanks

On 2020/02/20 at 8:12 AM, SiliconKid said:

Growatt SPF 5000TL HVM 5kVA/5kW Hybrid Inverter

So far, so good.

Now that I've got BMS comms working properly I'm pretty impressed with it, but I'm waiting for more load shedding to kick in so that I can monitor the performance properly.

I'm also hooking up a Raspberry Pi this week so that I can monitor both the inverter and batteries more effectively, and then I'll probably report back to these forums with more detailed info on performance and efficiencies.

 

I have 2 x 5kW Growatt Inverters (SPF 5000TL HVM-P) and 3 x 4.8kwh LiFePo4s (Bali48 from the Sunpays) batteries. How do I setup the dip switches and connect the comms cable so that they can communicate with the Inverters? Thanks 

 

  • 2 weeks later...
On 2020/10/07 at 11:07 AM, Jboshoff said:

Hi @SiliconKid,

I have 2 Growatt SPF 5000TL HVM-P inverters (parallel) + 2 x Revov UT512 Li Batteries (bridged). I currently do not have Solar connected. Inverter settings have UTL as main power source, Power Saving disabled and battery setting as USR and not LI

I am facing a problem where my batteries will discharge, even though electricity is provided by Eskom. If I manually switch Eskom off and on, then the inverters will start charging the batteries again. The installer did not connect comms cables between batteries and inverters - something about Revov awaiting approval from Growatt

Is the above something that can be fixed by upgrading the Inverter Firmware? Can you please email me the latest firmware updates and also tell me where to get the ISP tool everyone is referring to?

Thanks

Sorry but there is only one way to solve this .
Use battery setting USE2 

Then set the bulk = float (they will set each other to the same setting ) low .. dont use a high voltage . Sadly this will not solve the problem 100% as is sucks, the chinese figured they will charge up to 100% = target voltage in your case 54v Roughly (16s) which is right .. then charge is turned off .. then 10 mins later on again ..and it spends its life doing this .. every day 24hrs a day 365 ...
Hence i say set a low charge voltage because you will get Charge CREEP !
so use a conservative figure and hope growatt will release a correct firmware update soon. 

A side note Sunsynk and Deye are brilliant they work of canbus and do exactly what they should be doing on these batteries !

P.S. Growatt are denying any problems and or issues with a firmware Monumental botch up !
Dont expect resolution soon, Their technical team apparently does not speak a word of english and i cant seem to get their engineers or management contact details to explain the issue !. If any one has links do tell.

Short of taking  a flight there this new firmware is a big error on their part . And there is no way of rolling back !

Hi Guys, reading the thread. I am so confused. I have a Growatt + Pylontech US3000 batteries. The firmware the Growatt is 500.07/002.03/null. I get the battery and inverters link. However as soon as I choose Li option 2 I get error 4 and 20. Would I need to update the firmware to a newer to get the BMS working between the devices? 

According to Growatt support the US3000 is not supported. 

  • Author

Growatt can't get their firmware right so now they're blaming the batteries. It's not the batteries, other better inverters work fine with the same batteries based on anecdotal evidence. 

The firmware version numbers from Growatt are all over the place. I gave up trying to figure out which is version is the "most recent" or "correct". 

I have a firmware update pack that I've been giving to anybody who asks, that sorts out the original 4/20 BMS comms failures, as detailed by me in the very first post in this forum thread. 

That update will get BMS comms working properly over an RS485 cable but there are still issues related to Solar and input being turned on and off inappropriately which the SA Growatt community have been fighting for months. 

For a straight forward battery backup solution using the grid to charge the batteries and with NO solar connected, the firmware I offer is perfect. 

If you have Solar it doesn't look like there is any hope. Growatt can't get it right and it looks their inverters actually just aren't all that good. They work with solar, but the implementation is basic and non optimal. 

For Solar I would suggest getting rid of the Growatt and buying a Sunsynk or maybe Deye instead. The Sunsynk are very good. 

If you want the firmware I have, PM me. 

  • 2 weeks later...

Hi SiliconKid,

 

I hope you are well.

 

I am having the same problem with my Growatt SPF 5000T with 2x Pylontech US2000 and I am having the exact problems you had. I have read a few of your conversations about the problems. I managed to get only an error 4 (Low battery). The LI sign is on and they are charging.

 

Is it possible that you can send me the Inverters firmware update and tell me how to update it as well please? [email protected] / 084 548 4264.

Thanks for the help this far.

 

Kind regards,

 

Millard

Well I'm on AGM batteries, and since I installed the unit in May, the Battery voltages dropping way too quickly now and has been getting progressively worse. Running 500.08/002.03

9.6KWh AGM dropping to 48v standing (46v safety trigger under load) in less than 2 hours at around 200w-500w draw, should be getting at least 6 hours till it gets to 48v :( 
Charging also seems go climb way too quick, going from 48v - 49v then to 52+v in less than 5 mins while solar charging at 400w still early in the morning...

I have only ever dropped the batteries past 50% twice, once during load shedding the last time we had, and the other night during a power out. But the issue existed before that, and I noticed when the voltages dropped to v46, it slowed down the drain considerably, holding 45.5v for over an hour at the same 200w-500w draw. 

The tech from the company I purchased the unit says there is nothing wrong with the batteries, all tested at within .1 voltage of each other during load and standing. But I question if he knows what he is talking about, because when he finally came out to check, he set my bulk charge down to 53.8v instead of the 56v area that is normal for AGM and was adamant that it was right. I'm no expert, but I think that is LI battery settings. Doubt that is good, and didn't make any difference anyway.

Was wondering if I should downgrade firmware and BMS back to the version @SiliconKid sent. Other than that, I am just going to send them in for RMA so they can test. But that could take months.

Hi Silicon Kid,

 

Thanks for the update. i have managed to upgrade to firmware 500.09/002.03. I DM'd the link to you. I ran both the firmware installs. the BMS management is now working. i rebooted as guided with each firmware.  What I noticed was that the ISP goes to the last firmware. bin file when running you need to change the directory to the correct one. I have however lost the WiFI data logger function. Any recommendations on how to get it working again?

My 2x spf5000hvm lithium 9.6 bms

Hl run fine Sl looks like this are this normal my settings are rs485 to hub then batery cable to powerbox dip switch 0110

Screenshot_20201111-132824.png

On 2020/11/14 at 7:39 AM, Strauss said:

My 2x spf5000hvm lithium 9.6 bms

Hl run fine Sl looks like this are this normal my settings are rs485 to hub then batery cable to powerbox dip switch 0110

 

Hi Strauss,

I run two SPF5000TL with 24 PV and 2 x 9.6KW Pylontech stacks.  I use the firmware originally provided by Siliconkid.  It works fine accept the charging form PV doesn't seem to work very well and charge current is limited to 25A (too low for 20KW batteries), the use2 setup works fine for me.   Can you perhaps post your typical charging graph logs, I would like to compare with the BMS controlled results you have.

Image: This is what my charge curve looks like, charges up to 53V until sunset:

Second image: my daily chart on one of the inverters.

Screenshot_ShinePhone.jpg

Daily chart.JPG

 

Edited by j5_immortal

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