C
carlos16196
Hi all,
This is the first on-grid system I design and install. I live in Amman-Jordan but here we follow same UK standards so basically we have the same G83 applied (with of course different orientation and inclination for panels).
The configuration I designed is one string of 8 x 250W panels (Philadelphia Solar PS-M60H), and a Power One inverter: Aurora UNO-2.0-I-OUTD-S.
The system has been working like a charm for 14 days, using around 70% of production and exporting the rest to the grid during the day, and then consuming from the grid at night.
Today I went to check on the production of this amazing inverter, and to my surprise the inverter wasn’t displaying anything (blank screen, just like it does when I check it at night). So I pressed the “enter” button, screen started, inverter did the grid check, and then a message displayed “Waiting for Sun”. (just to eliminate a lot, panels are clean with not even a spot of shadow on them)
So as anyone else would do, I turned off inverter’s DC switch, and external grid’s AC switch. I got my multimeter and tested the string’s Voc, which was around 270V (maybe less or more but certainly in that range). So I reconnected them back and still same result “Waiting for Sun”.
Later on, I checked each panel individually for Voc, and they all gave me the expected average value of 35V. I didn’t do Current Isc check as I’m afraid of short circuiting the panels and don’t want to damage cables with arc. Also, I checked the Vstart value, which has always been 200V. I don’t want to change that value as it has been working before and Im pretty sure I am getting more than 200V.
The tricky thing that is getting me more confused, is that on the display of the inverter, it shows instant values of current and voltage for both PV (on the left) and grid (on the right), what is strange is that for the PV side it shows current but no voltage, but as I said earlier, when I disconnect string’s cables and use my multimeter I got around 270V.
Also, if there was something wrong or damaged in the inverter, shouldn’t it display an error message?
Can anyone around here please help me troubleshoot this issue?
Any kind of help will be much appreciated.
This is the first on-grid system I design and install. I live in Amman-Jordan but here we follow same UK standards so basically we have the same G83 applied (with of course different orientation and inclination for panels).
The configuration I designed is one string of 8 x 250W panels (Philadelphia Solar PS-M60H), and a Power One inverter: Aurora UNO-2.0-I-OUTD-S.
The system has been working like a charm for 14 days, using around 70% of production and exporting the rest to the grid during the day, and then consuming from the grid at night.
Today I went to check on the production of this amazing inverter, and to my surprise the inverter wasn’t displaying anything (blank screen, just like it does when I check it at night). So I pressed the “enter” button, screen started, inverter did the grid check, and then a message displayed “Waiting for Sun”. (just to eliminate a lot, panels are clean with not even a spot of shadow on them)
So as anyone else would do, I turned off inverter’s DC switch, and external grid’s AC switch. I got my multimeter and tested the string’s Voc, which was around 270V (maybe less or more but certainly in that range). So I reconnected them back and still same result “Waiting for Sun”.
Later on, I checked each panel individually for Voc, and they all gave me the expected average value of 35V. I didn’t do Current Isc check as I’m afraid of short circuiting the panels and don’t want to damage cables with arc. Also, I checked the Vstart value, which has always been 200V. I don’t want to change that value as it has been working before and Im pretty sure I am getting more than 200V.
The tricky thing that is getting me more confused, is that on the display of the inverter, it shows instant values of current and voltage for both PV (on the left) and grid (on the right), what is strange is that for the PV side it shows current but no voltage, but as I said earlier, when I disconnect string’s cables and use my multimeter I got around 270V.
Also, if there was something wrong or damaged in the inverter, shouldn’t it display an error message?
Can anyone around here please help me troubleshoot this issue?
Any kind of help will be much appreciated.