3 phase solar

[snowmaneu1]

I have 360 v being produced line to line 3 phase .. line to neutral is 208. This is being produced by three Growatt 5000US solar spf inverters set up for three phase. Problem is the well pump is 3 phase 240v line to line.
Any help would be appreciated

 

[wyliesdiesels]

First off where are you located? 360v is not a US 3 phase or single phase voltage.

 

[mike93lx]

Sounds like your inverters may not be configured properly?

 

[LopezBart]

A manual (https://signaturesolar.com/content/...PF_3500-5000_US_User_Manual_EN_202203 (1).pdf) is handy....

 

[snowmaneu1]

First off where are you located? 360v is not a US 3 phase or single phase voltage.

This power is created via growatt 3 inverters 5000US in 3 phase (1 in each phase) config. Did you see the multimeter pics? I'm in Southern California sdge utility. My 3 phase well pump runs off utility 240 (120,120,209 line to neutral, 240 line to line).

 

[mm08822]

Do not close any cb's in that panel with the inverter output connected.

Post a pic of the inverter nameplate.

 

[snowmaneu1]

Sounds like your inverters may not be configured properly?

Why do you say that?

 

[mike93lx]

Why do you say that?

Because it's not working right

 

[snowmaneu1]

Do not close any cb's in that panel with the inverter output connected.

Post a pic of the inverter nameplate.

Everything is disconnected via disconnect switch. Growatt spf 5000US I have three of them 1 in each phase each connected with communication cabling

 

[snowmaneu1]

Because it's not working right

That implies you know what it should produce.. ???

 

[mike93lx]

That implies you know what it should produce.. ???

It shouldn't produce 360v. That seems clear.

I would run through the config and check everything against the manual

 

[snowmaneu1]

A manual (https://signaturesolar.com/content/documents/GROWATT/5kw US Inverter/SPF_3500-5000_US_User_Manual_EN_202203 (1).pdf) is handy....

I have that and talked with signature solar from whom I purchased three 5000US models specifically for this procedure. They said it can do three phase just didn't say NOT 240v output

 

[PCustoms]

No offense, but I don't think you should be messing around in that panel. Seeing tools propped up that close to exposed terminals that should have 480v seems careless.

 

[snowmaneu1]

Do not close any cb's in that panel with the inverter output connected.

Post a pic of the inverter nameplate.

 

[snowmaneu1]

No offense, but I don't think you should be messing around in that panel. Seeing tools propped up that close to exposed terminals that should have 480v seems careless.

I created that panel .. understood

 

[PCustoms]

I created that panel .. understood

Do you understand the risks with 480v 3 phase?


Also I just scanned the inverter specs. I missed where it says 3 phase output or output above 240v

 

[mike93lx]

Do you understand the risks with 480v 3 phase?


Also I just scanned the inverter specs. I missed where it says 3 phase output or output above 240v

Its in the manual, you can config sets of 3 for 3 phase. The output over 240v is why I believe it's a config issue

Why do you think that is a 480v panel?

 

[mm08822]

Are these 3 inveters hooked up L-L or L-N?

 

[dcg9381]

Shut down all inverters. I'd "prefer" to have the 2nd and 3rd inverters to have disconnected outputs.
Check LCD settings #8 and #9 when the remaining inverter is in STANDBY mode.

#8 controls output voltage. 240/230/208v.
#9 controls frequency. 50/60 hz.

 

[mm08822]

That is the cover page of the manual not the nameplate from an inverter.

 

[snowmaneu1]

I created that panel .. understood

Do you understand the risks with 480v 3 phase?


Also I just scanned the inverter specs. I missed where it says 3 phase output or output above 240v

Do you understand the risks with 480v 3 phase?


Also I just scanned the inverter specs. I missed where it says 3 phase output or output above 240v

Pg 16 setting 08, Pg 18 setting 23

 

[dcg9381]

Two other things to check:


This is configuration for 3-phase:

 

[snowmaneu1]

Are these 3 inveters hooked up L-L or L-N?

Each inverter in single phase (before being hooked up 3phase) has 3 output G,N,L .. essentially two hots and a ground. Growatt specify I hooked up a common wire between the three neutral lines and ground it. .. so my multimeter read 208 to neutral but 360 line to line

 

[snowmaneu1]

Two other things to check:


This is configuration for 3-phase:

I see that. The pictures I included show I've set that feature to 209 not 230. If I go back and reset the features to 230 .. I'm going to end up with over 400 v line to line

 

[snowmaneu1]

Its in the manual, you can config sets of 3 for 3 phase. The output over 240v is why I believe it's a config issue

Why do you think that is a 480v panel?

if I reset the features on Pg 16 to 230 then I'll have an output over 400 v..

 

[mm08822]

So you are connected exactly as per diagram in 5.5 ?

Diagram does not show a neutral to be grounded. This is a safety issue where the grounded surfaces will carry current.

Each inverter in single phase (before being hooked up 3phase) has 3 output G,N,L .. essentially two hots and a ground. Growatt specify I hooked up a common wire between the three neutral lines and ground it. .. so my multimeter read 208 to neutral but 360 line to line

 

[snowmaneu1]

Two other things to check:


This is configuration for 3-phase:

I see that. So what should the actual output s

Shut down all inverters. I'd "prefer" to have the 2nd and 3rd inverters to have disconnected outputs.
Check LCD settings #8 and #9 when the remaining inverter is in STANDBY mode.

#8 controls output voltage. 240/230/208v.
#9 controls frequency. 50/60 hz.

the remaining inverter if disconnected from 3 phase will be 230-240 output with two hots .. but my motor is three phase 240.. are you saying single phase 240v can run 3 phase 240v motor

 

[dcg9381]

I see that. The pictures I included show I've set that feature to 209 not 230. If I go back and reset the features to 230 .. I'm going to end up with over 400 v line to line

I'm not that familiar with 3-phase, but it looks to me like more than 240V should not be possible across any L1/L2/L3.

the remaining inverter if disconnected from 3 phase will be 230-240 output with two hots .. but my motor is three phase 240.. are you saying single phase 240v can run 3 phase 240v motor

You should not run a 240V 3-phase motor on 2 phase power no.

​

I assume this is the "US spec" inverter bought from a semi-reliable importer (Signature Solar, etc) - not something you've bought "off the boat"?

Is this grid tie or straight inverter power from battery?

 

[snowmaneu1]

So you are connected exactly as per diagram in 5.5 ?

Diagram does not show a neutral to be grounded. This is a safety issue where the grounded surfaces will carry current.

Ac out inverter source Neutral grounded

 

[snowmaneu1]

I'm not that familiar with 3-phase, but it looks to me like more than 240V should not be possible across any L1/L2/L3.




You should not run a 240V 3-phase motor on 2 phase power no.

​

I assume this is the "US spec" inverter bought from a semi-reliable importer (Signature Solar, etc) - not something you've bought "off the boat"?

Is this grid tie or straight inverter power from battery?

Straight from solar panels and 600 amp hrs of 48 v LiFePO4 .. from signature solar

 

[snowmaneu1]

I'm not that familiar with 3-phase, but it looks to me like more than 240V should not be possible across any L1/L2/L3.




You should not run a 240V 3-phase motor on 2 phase power no.

​

I assume this is the "US spec" inverter bought from a semi-reliable importer (Signature Solar, etc) - not something you've bought "off the boat"?

Is this grid tie or straight inverter power from battery?

I have three hots no neutral

 

[mm08822]

Ac out inverter source Neutral grounded

Terminology is everything. You connected each inverter to a neutral. The neutral is bonded to ground elsewhere, you did not ground the neutral a second time b/c of the inverters, correct?

 

[mm08822]

Is that sole black wire on the left vertical bar in the panel your neutral for the inverters?

 

[yatg]

Each inverter in single phase (before being hooked up 3phase) has 3 output G,N,L .. essentially two hots and a ground. Growatt specify I hooked up a common wire between the three neutral lines and ground it. .. so my multimeter read 208 to neutral but 360 line to line

That actually makes sense, math wise. 208 * 1.73 = approx 360

Its just not a conventional 3p voltage configuration.



Will your pump run on 208V-3p? A lot of stuff is rated 208-230.

Problem is the well pump is 3 phase 240v line to line.

Where are you measuring that at? At the control box L1,L2,L3? Measure L1-L2, L1-L3, L2-L3.

 

[wyliesdiesels]

This power is created via growatt 3 inverters 5000US in 3 phase (1 in each phase) config. Did you see the multimeter pics? I'm in Southern California sdge utility. My 3 phase well pump runs off utility 240 (120,120,209 line to neutral, 240 line to line).

yeah so your inverters are not configured or connected properly.

FYI those breakers are not rated for more than 240v. you should shut off the inverters before doing any other work

 

[wyliesdiesels]

That implies you know what it should produce.. ???

ummm you cannot connect inverters that are outputing 360v to a system that is designed and rated for 240v. Did you notice your breakers are rated for 240v?

 

[wyliesdiesels]

No offense, but I don't think you should be messing around in that panel. Seeing tools propped up that close to exposed terminals that should have 480v seems careless.

that is NOT a 480v panel. notice the breakers are rated 240v?

 

[wyliesdiesels]

I'm not that familiar with 3-phase, but it looks to me like more than 240V should not be possible across any L1/L2/L3.




You should not run a 240V 3-phase motor on single phase power no.

​

I assume this is the "US spec" inverter bought from a semi-reliable importer (Signature Solar, etc) - not something you've bought "off the boat"?

Is this grid tie or straight inverter power from battery?

fixed it for you. 2 phase is something entirely different

 

[wyliesdiesels]

I have three hots no neutral

is this a grid tied system?

If so what is the voltage of the utility? 240v 3Ø? if so then you have delta service 3 wire.

how do you have your inverters connected to utility? 1 line from each inverter goes to utility connection along with neutral. 1 line from each inverter goes to house load.

 

[PCustoms]

that is NOT a 480v panel. notice the breakers are rated 240v?

No, I didn't.

Seems the OP shouldn't be getting 480v anyway, not sure how he's getting 360v

Either way seems he's in over his head with some potentially dangerous voltages.