Jules_Theone
Member
Hi,
I have convinced my father to get solar panels fitted to his house roof, I have already had a 4kWp grid-tied system fitted to mine nearly a year back and it seems to be going well for me. He has had a couple of quotes from different companies but only one has given an actual written quote with datasheets etc.
His roof is quite complicated as it doesn't have much space facing south, some east and some west so I believe there will be solar panels facing all three directions. This complicates MPP I guess.
The quote will the most detail is:
2kWp:
8 x 250W Yingli YL250 panels
2000HF SMA Sunnyboy Inverter
Cable / connectors etc.
I was looking closely at if the inverter will work with the solar panels - comparing the specs, voltages / current etc and it doesn't look to me that it will work all that well.
250W Yingli Panels:
https://www.solardesigntool.com/components/module-panel-solar/Yingli-Solar/1170/YL250C-30b/specification-data-sheet.html
Pmax = 250W (8 x 250 = 2000W)
Vmpp = 30.5V (8 x 30.5 = 244V)
Impp = 8.2A (series connected so 8 panels = 8.2A)
Voc = 38.1V (8 x 38.1 = 304.8V)
2000HF SMA Inverter:
https://www.rexelrenewableenergy.co.uk/FileDepository/TechDocs/Inverters/SMA%20Sunnyboy%20Installation%20Guide%202000HF%202500HF%203000HF.pdf
Vmpp = 175V - 560V
Vstart = 220V
Number of independent MPP = 1
Number of strings per MPP = 2
I think it will not work very well if some panels are facing west, some east and some south if they are all in series. And even then the MPP voltage of 8 panels in series is not much more than the startup voltage for the inverter.
Ideally the system should have separate MPP tracking (separate inverters?) for each set of panels facing different directions. Due to roof space, I think I can fit 4 facing west, 2 facing south and 2 facing east.
Does anyone have any recommendations to the setup because I might just end up doing it myself.
Thanks for any help,
Jules
I have convinced my father to get solar panels fitted to his house roof, I have already had a 4kWp grid-tied system fitted to mine nearly a year back and it seems to be going well for me. He has had a couple of quotes from different companies but only one has given an actual written quote with datasheets etc.
His roof is quite complicated as it doesn't have much space facing south, some east and some west so I believe there will be solar panels facing all three directions. This complicates MPP I guess.
The quote will the most detail is:
2kWp:
8 x 250W Yingli YL250 panels
2000HF SMA Sunnyboy Inverter
Cable / connectors etc.
I was looking closely at if the inverter will work with the solar panels - comparing the specs, voltages / current etc and it doesn't look to me that it will work all that well.
250W Yingli Panels:
https://www.solardesigntool.com/components/module-panel-solar/Yingli-Solar/1170/YL250C-30b/specification-data-sheet.html
Pmax = 250W (8 x 250 = 2000W)
Vmpp = 30.5V (8 x 30.5 = 244V)
Impp = 8.2A (series connected so 8 panels = 8.2A)
Voc = 38.1V (8 x 38.1 = 304.8V)
2000HF SMA Inverter:
https://www.rexelrenewableenergy.co.uk/FileDepository/TechDocs/Inverters/SMA%20Sunnyboy%20Installation%20Guide%202000HF%202500HF%203000HF.pdf
Vmpp = 175V - 560V
Vstart = 220V
Number of independent MPP = 1
Number of strings per MPP = 2
I think it will not work very well if some panels are facing west, some east and some south if they are all in series. And even then the MPP voltage of 8 panels in series is not much more than the startup voltage for the inverter.
Ideally the system should have separate MPP tracking (separate inverters?) for each set of panels facing different directions. Due to roof space, I think I can fit 4 facing west, 2 facing south and 2 facing east.
Does anyone have any recommendations to the setup because I might just end up doing it myself.
Thanks for any help,
Jules