I
ianhager
Hi,
I'm no expert so your help will be greatly appreciated.
I've been asked to look at somebodies PV system comprising of 12 of Jetion 250w black fram, black back solar panels installed as a single string using as SMA sb2500 inverter on a west facing roof.
I've been told the inverter sometimes flashes saying input DC voltage too high. The maximum input from what I can see for this inverter is 600v DC and after visiting when this has happened, i took a reading of 657v DC, obviously too high.
What I'm asking is that if you agree with me that the problem is these panels all wired as a single string, and with the maximum dc voltage of these panels @ 61.7v DC (in series a possiblility of , not probability of 740v DC) could the wiring be re-arranged to split the array into 2 seperate strings of 6 panels each? Could this inverter take this voltage spread over the two strings or is this inverter not capable of doing this? I know that it takes 2 strings but am unsure of the combined voltages.
The customer want's to know if he should go back to the installer if a different inverter is needed or to just get them back to alter the configuration?
Thanks in advance for any help you can offer.
Ian:29:
I'm no expert so your help will be greatly appreciated.
I've been asked to look at somebodies PV system comprising of 12 of Jetion 250w black fram, black back solar panels installed as a single string using as SMA sb2500 inverter on a west facing roof.
I've been told the inverter sometimes flashes saying input DC voltage too high. The maximum input from what I can see for this inverter is 600v DC and after visiting when this has happened, i took a reading of 657v DC, obviously too high.
What I'm asking is that if you agree with me that the problem is these panels all wired as a single string, and with the maximum dc voltage of these panels @ 61.7v DC (in series a possiblility of , not probability of 740v DC) could the wiring be re-arranged to split the array into 2 seperate strings of 6 panels each? Could this inverter take this voltage spread over the two strings or is this inverter not capable of doing this? I know that it takes 2 strings but am unsure of the combined voltages.
The customer want's to know if he should go back to the installer if a different inverter is needed or to just get them back to alter the configuration?
Thanks in advance for any help you can offer.
Ian:29: