Growatt SPF5000 ES is not a 5000w Inverter
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Data on charging current/amperage and the battery voltage too.
Cause : Power = Voltage x Amperage
This is graph has battery current, so whatever you see as positive it means charge - last two days. Now is a bright day, I'll shutdown all possible load (except the computer LoL) and send you a detail of the last hour - should give great positive values
Let me know if this works - i included battery voltage. Note that its hard to see but these are for two inverters, two battery banks(parallel) and two PV arrays.
I can give you a view at the Grafana graphs, let me know and i can send you the credentials in PM.
timselectric
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Are we dealing with a different issue from the OP's , now?
The low voltage DC bus doesn't have any affect on the PV to AC load.
When the inverter pulls a large current from solar panel (something about solar panel being a current source), its voltage will drop with increasing load until the voltage reach 0V and current is Isc short circuit current.
Now, we don't want that to happen because when lsc is max, the voltage is 0, meaning no power production.
So, the inverter will have to compensate via the battery to balance it out.
Hence I am asking the thread starter for data on the solar panel voltage and current, together with the total charging current with the load consumption.
The data would probably show the solar panel current will be slightly higher during heavy load while the pv voltage drops.
timselectric
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I didn't understand where you were going.
Because their issue, according to them. Is that the PV can produce full wattage, as long at its not going to AC loads. And according to them, it's not from a surge (short term issue). It's an ongoing continuous issue.
They aren't having any issues from, or to the battery. (According to them)
It is possible that they are misinterpreting the information that they are seeing.
More data would definitely help.
Hi Tim and all the others, its an issue with the software, and most times it seems as the AC output gets to 18.5 amps, it says, I'm out of here,
I think most will not even notice the issue, under load I'm sitting at around 290-310v and it will do 5kw @around 18amp PV, that is, load under 4kw and the rest battery charging, All I have to do is change a few timers and spread the load not to go over 4kw at any one time, I am sure there will be a firmware update to adjust the MPPT tracking algorithm, we will see
timselectric
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I guess that it could be a problem in your firmware. But it's really odd that you have had the same issue with two different units.Hi Tim and all the others, its an issue with the software, and most times it seems as the AC output gets to 18.5 amps, it says, I'm out of here,
I think most will not even notice the issue, under load I'm sitting at around 290-310v and it will do 5kw @around 18amp PV, that is, load under 4kw and the rest battery charging, All I have to do is change a few timers and spread the load not to go over 4kw at any one time, I am sure there will be a firmware update to adjust the MPPT tracking algorithm, we will see
The factory has said they managed to simulate the issue now
, they will send a test firmware to me sometime, and we can see For now I just adjusted my Sonoff switches times, to keep the load below 4000w, but would be nice for the unit to do the ac loads, we will see I guesstimselectric
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Fingers crossed.The factory has said they managed to simulate the issue now
I hope that they get your issue resolved.
It's definitely a strange one.
timselectric
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I completely agree.I hate new firmware
I never update anything, unless I absolutely have to.
robbob2112
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Once everything is working correctly for me - Never update firmware
When I am doing a fresh install of equipment I always update to current - then I am troubleshooting whatever the current issues are verse finding out my problems are fixed in the next code rev.
What I wish they would do is make it a law that all firmware MUST be opensource - and if there is some secret squirrel company proprietary driver they can provide a binary to include in the opensource..... Asus does this with all their routers --- opensource Ddwrt runs on it, and Asus provides binary drivers for the radios
And Asus will give you the change log
timselectric
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I'm not a programmer, and don't want to be.
If it doesn't work out of the box, it wasn't ready to go into the box.
I'm not interested in things that aren't ready yet.
robbob2112
Doing more research, mosty harmless
You funny like clown there Tim... I agree, but I also know companies never wait on programmers to be finished or unit test all the possibilities... all they want to do is ship it.... which is why when I get an update on my phone, there are usually 2 more in days...
And these inverters probably have a few hundred thousand lines of code in them with a good part written in C by a retired programmer years ago and the new kids don't understand the reason things were done years ago ....
timselectric
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I'm old fashioned. I'm not interested in beta testing someone else's work. I buy products that have already been proven to do what I need.
At least when it's something that I will depend on.
Been working with IT the past 30+ years, I think is very rare that companies are being truth when declaring something is ready. I do update firmware the best opportunity i have, sometimes i regret ( then i downgrade) but most of the times is the right thing to do. Just because mission critical appliances are not free of bugs even if the company, at some point, declare them ready for production. Just mentioning bugs, not security issues (total different world).
I understand your opinion, but perhaps a good compromise would be "if ain't broken, don't fix it"
cheers, Tabascoz
timselectric
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Exactly
I don't update anything. Because I don't buy broke stuff.
Updates should be for upgrading or adding features. Not because it wasn't ready, or from the lack of QC.
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