Try increasing it to 2Amp to fully "counter-act" the inverter power consumption of 70watts. This is what I set at my SPF6000ES.Here
Ok I’ll give that a shot. Thank youTry increasing it to 2Amp to fully "counter-act" the inverter power consumption of 70watts. This is what I set at my SPF6000ES.
1Amp x 51.2v = 51.2watts
2Amp x 51.2v = 102.4watts
Report back later.
Good to hear that 2Amp works.Good morning Hashley. Great trick. I set it to 2 amps and this morning my batteries are at 30% waiting for the sun Thank you for that. Is it a bug on my unit I cannot set the miminum percent lower than 30? I read that it is totally fine to dischage a lithium battery at 20 or 10 %. Curious about your 6000 SPF, does it allow you to go lower than 30% ? Thanks again..
I think I do. I will try those settings,.Thank you.Good to hear that 2Amp works.
Next answer to your query:
There is 5% spread for these 3 settings:
Setting 21 < Setting 12 < Setting 13
Example:
21 Cutoff 10% < 12 Back to AC 15% < 13 AC back to solar/battery 20%
Notice the pattern?
Then again, I suggest you just keep the Setting 11 to 0Amp and maintain Setting 11 at 30% if you plan to discharge to 10%.
No other remaining option other than firmware upgrading. Hmm.......Good morning. Just so you know my problem still the same. Only one morning I saw 30% but yesterday 18% and today 23%. I'll contact Growatt and see what they say. Maybe they upgrade the firmware as you suggested.
I think it is more likely that your batteries are the issue.Good morning. Just so you know my problem still the same. Only one morning I saw 30% but yesterday 18% and today 23%. I'll contact Growatt and see what they say. Maybe they upgrade the firmware as you suggested.
Indeed, in fact, even Growatt battery pack may require firmware update too.I think it is more likely that your batteries are the issue.
If you have a BMS that averages, and your batteries are 18%, 23% and 25%, the master BMS should be reporting 22% to the Growatt
If you have a BMS that sends the highest under charge, and the lowest under discharge, you will get either 18% or 25%, and when the solar input is close to the load output, the system will jump between these numbers and be very confusing
If your batteries are not well cabled, or not matching, your individual SOC could drift quite far apart (percentages in the 20's or 30's)
If you have a usb to serial with the appropriate RJ11 plug wired to enable you to use software to interrogate the RS232 port, you can see what is going on in the battery.
If you have a screen on each battery, you might be able to use that to see what is going on.
If you have a lot of hacking skills, you can intercept the messages between batteries and log a lot of data.
Either way, you are going to have to prove to yourself that the batteries are behaving correctly, because other than what @AshleyL said about the inverter using battery even in bypass mode, your settings seem correct, and the behaviour of your Growatt seems consistent and correct.
Thank you for your help. This morning the 3 batteries are at 30%. Go figure. I am a network guy and make my own cables and some electronics. I would love to be able to see BMS data. Where can I find documentation and software? Thanks again.I think it is more likely that your batteries are the issue.
If you have a BMS that averages, and your batteries are 18%, 23% and 25%, the master BMS should be reporting 22% to the Growatt
If you have a BMS that sends the highest under charge, and the lowest under discharge, you will get either 18% or 25%, and when the solar input is close to the load output, the system will jump between these numbers and be very confusing
If your batteries are not well cabled, or not matching, your individual SOC could drift quite far apart (percentages in the 20's or 30's)
If you have a usb to serial with the appropriate RJ11 plug wired to enable you to use software to interrogate the RS232 port, you can see what is going on in the battery.
If you have a screen on each battery, you might be able to use that to see what is going on.
If you have a lot of hacking skills, you can intercept the messages between batteries and log a lot of data.
Either way, you are going to have to prove to yourself that the batteries are behaving correctly, because other than what @AshleyL said about the inverter using battery even in bypass mode, your settings seem correct, and the behaviour of your Growatt seems consistent and correct.
Here you go. Documentation for RS485 for the inverter and the battery BMS.Thank you for your help. This morning the 3 batteries are at 30%. Go figure. I am a network guy and make my own cables and some electronics. I would love to be able to see BMS data. Where can I find documentation and software? Thanks again.
Thank you.Indeed, in fact, even Growatt battery pack may require firmware update too.
Previously, I encountered few users in this forum where their battery BMSs are reporting state of charge based on voltage level linearly to the inverter. One user was able to get a firmware update for his battery pack BMS and the problem was "solved".
Then there is case where user encounters one weak cell in the battery pack that ruined the overall SOC......
Thank you for the information. yes. around 5 am we reached 30%. it switched to bypass mode and at 6 30 am when I look the batteries never went below 30%. So the big question is why one day work and another not? I will start invesatigating my BMS data thank you!Here you go. Documentation for RS485 for the inverter and the battery BMS.
Question, are you still able to maintain 30% in bypass mode?
OMG. Did you just brick it by doing it yourself?thank you for the documentation. I was hoping more for a windows GUI interface that could display status of each invidual cells. By the way you guys suggestion that it might be battery related was good. I disconnected them and upgraded firmware via USB stick one battery at a time
. 2 out of 3 did the flashing thing and came right back up. The middle battery refuse to start. Any suggestions? Thank you.
Congratulation on fixing the issue, your post on J-Link emulator and special connector will be helpful for others in future.Hello everybody almost 2 months no news from me because that what it took me to solve the issue failed upgrade. So I share my findings here maybe it helps one of you. To this day, Growatt in 4 different countries don`t know why some batteries upgrade just fine, other won`t reboot, some wont accept the update. From testing voltage to testing MOFSET on BMS card etc I did a lot of Growatt recommended solution but only one worked. Get a J-LINK emulator, get or build a special connector to connect to the BMS data port. Get the latest firmware 0007. When flashing the software to the BMS board chip, it will erase the corrupted boot loader. After the upgrade is done re-assemble the battery per Growatt instruction. Be very careful. I now have 6 batteries running on 0007. Zero issue. My overdischargning issue is gone too.