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Connecting more solar panels that the inverter is rated for

Greck1982

Greck1982

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May 23, 2022
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The garage's roof has two sides and one of the sides is sunnier, so if my inverter is rated for 8kW and I have 8kW of panels distributed on both sides of the garage's roof, that way I never can come to the point of producing 8kW, can I have like 10kW of solar panels connected to the inverter so it can produce more?

probably the answer is very depends, but need to hear all your ideas, Thank you.
 
The way I read the datasheet:

11800W max input power
480Voc
400V nominal
20A max (2)

(2) stated values the to current input its limit will inverter the; used be may source current higher

Conclusion: Voc < 480V + temperature margin, up to 11800W
 
I have a 12kw inverter using 16kw of panels. I set it up with 5 charge controllers that only read battery voltage. It works perfect. When I start the system I turn everything on and let the controllers read the batteries voltage for a while then turn on the panels so they charge. I'm thinking of trying this using the built in charge controllers in the inverter also. It seems to me that it should work the same way. The charge controllers only read the battery voltage so they shouldn't know how many of them there are or where they're located.
Has anyone ever tried connecting multiple all in one inverters to the same large battery pack. All the inverters would be powering different electrical systems and not communicating with each other, just charging this same way as I am now and all connected to the same batteries. Here we have frequent power outages and since all of my inverters need batteries, I was thinking of this so when there's no power I could shut off everything non essential and have lots of battery power left over for the critical loads.
 
the_uglydog said:
I have a 12kw inverter using 16kw of panels. I set it up with 5 charge controllers that only read battery voltage. It works perfect. When I start the system I turn everything on and let the controllers read the batteries voltage for a while then turn on the panels so they charge. I'm thinking of trying this using the built in charge controllers in the inverter also. It seems to me that it should work the same way. The charge controllers only read the battery voltage so they shouldn't know how many of them there are or where they're located.
Has anyone ever tried connecting multiple all in one inverters to the same large battery pack. All the inverters would be powering different electrical systems and not communicating with each other, just charging this same way as I am now and all connected to the same batteries. Here we have frequent power outages and since all of my inverters need batteries, I was thinking of this so when there's no power I could shut off everything non essential and have lots of battery power left over for the critical loads.
Click to expand...

This thread is for a grid tie inverter, but I don't see anything particularly wrong with your proposed solution. It's not typical, but I think it's workable. I don't know for certain, but you might run into an issue with bonding/grounding and/or split phase operation if your "different" electrical systems share anything in common
 
I didn't notice it was a grid tie. My grid tie inverter has 3 separate inputs for 3 separate strings. All show varying voltage and amps but don't affect the others, I've used it with one string not even working. If his has 3 inputs like the Growatt units, just connect each string to each different connection would work fine.
The only thing any of my systems share is the grounding. They are all grounded together both near the inverters and feeding from there to the drop. Only one of the systems uses split phase, another is split phase but only uses 220, and the others are 230v single phase for a/c units that run on that system.
 
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