I have the following system
3 strings of 10 Hyundai HiS 290RG panels (Voc 38.8)
Sunny Boy Rapid Shutdown Device, 2 strings going to one output, 1 string to the other
Sunny Boy 7.7 1SP US-40 inverter
When I observe the DC values on my inverter, early in the day the watts from one DC input is half of the other, which I think is expected. However as the sun get higher, eventually one DC input gets to a point where the input with two strings stops increasing while the input with one string keeps increasing. The attached files show an example early in the day and at peak which I hope explains it better.
It appears as currently set up, I'll never get more than about 6200 W output from this system. Given the inverter can do 7700 W and I have oversized my array, I am disappointed in this. I've raised this issue with my installer and he has been slow to respond. So I thought I would run it by this group to better guage what my problem is.
Is this just an issue with inverter settings or am I going to need to change how my hardware is set up to get the potential of this system?
Or is the inverter working the way it should and this is all I will ever get? 70% of panel peak output seems low.
Thanks, Steve
3 strings of 10 Hyundai HiS 290RG panels (Voc 38.8)
Sunny Boy Rapid Shutdown Device, 2 strings going to one output, 1 string to the other
Sunny Boy 7.7 1SP US-40 inverter
When I observe the DC values on my inverter, early in the day the watts from one DC input is half of the other, which I think is expected. However as the sun get higher, eventually one DC input gets to a point where the input with two strings stops increasing while the input with one string keeps increasing. The attached files show an example early in the day and at peak which I hope explains it better.
It appears as currently set up, I'll never get more than about 6200 W output from this system. Given the inverter can do 7700 W and I have oversized my array, I am disappointed in this. I've raised this issue with my installer and he has been slow to respond. So I thought I would run it by this group to better guage what my problem is.
Is this just an issue with inverter settings or am I going to need to change how my hardware is set up to get the potential of this system?
Or is the inverter working the way it should and this is all I will ever get? 70% of panel peak output seems low.
Thanks, Steve
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