Growatt SPF 3000TL not detecting PV

[taniman]

I recently purchased a Growatt SPF 3000TL LVM-48P from signature solar.
I have a total of 3. But 1 got damaged so I had to replace it.

My other 2 inverters can see my PV and charge my battery just fine. but the new one does not detect the PV.
I have checked and the PV is sending Voltage just fine to the inverter.

I have made sure all inverters have the same firmware version.

So I am not sure what else I could check or how to make sure it is not the MPPT that is damaged.

Anyone got any thing else I could try?

 

[sunshine_eggo]

How is the PV arranged?

Are you trying the inverters one at a time, or simultaneously?

 

[taniman]

It is a 3 phase system.

1 phase per inverter.
15 solar panels.
3 arrays of 5. If I am saying that correctly.



this is the spec of the solar panels.


when I do a DCV check I see the PV is sending around 60-70 volt for each array.

 

[sunshine_eggo]

Have you confirmed the unit won't work with multiple arrays?

 

[taniman]

Have you confirmed the unit won't work with multiple arrays?

Hi, I am not really sure I understand what you mean by this.

I have 3 inverters each inverter connects to 1 PV array.

 

[sunshine_eggo]

Hi, I am not really sure I understand what you mean by this.

I have 3 inverters each inverter connects to 1 PV array.

So you have a single array that you're feeding to all three MPPT? If so, that won't work. Each MPPT must be attached to its own array. You must fix this.

OR

Each 5S string is an array - one for each MPPT, i.e., you have three arrays. Have you tried the errant MPPT with more than one array?

 

[taniman]

Each 5S string is an array - one for each MPPT, i.e., you have three arrays. Have you tried the errant MPPT with more than one array?

I have this.

I have not tried to switch arrays. That's a good one. Not sure the cables are long enough though to reach the thirds inverter. Might have to loosen it.
but I should try.

It's at least something to rule out yeah thanks

 

[taniman]

just an update. woke up a few days ago, it was smelling like burning and I could hear like sparks.
So I turned PV off for that 1 inverter. turns out whole mppt board was fried.

I have no idea how that could have happened cause the voltage is within range.
So I got a new inverter and that one is working fine.

Will see about doing a claim

 

[sunshine_eggo]

just an update. woke up a few days ago, it was smelling like burning and I could hear like sparks.
So I turned PV off for that 1 inverter. turns out whole mppt board was fried.

I have no idea how that could have happened cause the voltage is within range.
So I got a new inverter and that one is working fine.

Will see about doing a claim

Damn. Sometimes MPPT just fail... spectacularly!

Hopefully, they take care of you.

 

[Travis_signaturesolar]

just an update. woke up a few days ago, it was smelling like burning and I could hear like sparks.
So I turned PV off for that 1 inverter. turns out whole mppt board was fried.

I have no idea how that could have happened cause the voltage is within range.
So I got a new inverter and that one is working fine.

Will see about doing a claim

Hello, if you’ll send me over your email I’ll have one of our techs reach out to you tomorrow to assist you.

 

[schmism]

I have this.

Perhaps I miss understood something.

5S config on a 40v pannel = 200v which is well above the max of 150 that the inverter you listed supports. So burning up the MPPT is not surprising.

 

[sunshine_eggo]

Perhaps I miss understood something.

5S config on a 40v pannel = 200v which is well above the max of 150 that the inverter you listed supports. So burning up the MPPT is not surprising.

Whoa. I missed that big time. I can't keep the models straight, and so many of them now have 450V+ higher PV input, I didn't check.

145Voc max

3S is the max on those panels.

 

[taniman]

Perhaps I miss understood something.

5S config on a 40v pannel = 200v which is well above the max of 150 that the inverter you listed supports. So burning up the MPPT is not surprising.

No. they are not in series. That's on me for not knowing the correct setup.
The panels are setup like so.

2 series. 3 parallel. Either way I get about 75V from the array. and about 30 amps

 

[taniman]

Whoa. I missed that big time. I can't keep the models straight, and so many of them now have 450V+ higher PV input, I didn't check.

145Voc max

3S is the max on those panels.

yes, I did not provide correct setup as I was given incorrect information on the panels on the roof.

It's 2S 3P setup. I get about 75V from the array. and about 30 amps

6 panels for each array. a total of 18 panels is what I have.

Also I know the setup was correct cause I have 3 inverters. Only 1 was faulty. So if it was an overvoltage all 3 would be fried. :D

Sorry for confusion

 

[sunshine_eggo]

yes, I did not provide correct setup as I was given incorrect information on the panels on the roof.

It's 2S 3P setup. I get about 75V from the array. and about 30 amps

whew.

Sounds about right.

6 panels for each array. a total of 18 panels is what I have.

Okay. You gave very different info in post #3

Also I know the setup was correct cause I have 3 inverters. Only 1 was faulty. So if it was an overvoltage all 3 would be fried. :D