M
MrTrance
Working in Wales yesterday, 9 255w panels and 1 SMA 2000HF Inverter.
So we have 1 string of 9 panels in series.
The roof was like this with each letter corresponding to a panel.
[A]--[C]
[DORMA WINDOW]
[D]-[E]-[F]-[G]-[H]-
ABC panels in landscape, the rest portrait.
All panels at same degree, maybe some shading on the D-I panels due to trees, maybe this is why I got this problem.
Right so my inverter was in the loft, I took one cable to panel C, the other leg to panel I, and then a man made link from D-A... back in the loft I had my meter on my legs testing for voltage and I only seen 105V DC max. Could not work it out at all, done over 100 solar installs and never seen this.
To get round this after a few hours of frustration, I made ABC into a circuit and D-I in a circuit and then made that into a series circuit in the loft (connecting + from top with - from bottom), thus giving me 300V roughly, what I was looking for in the first place!
I need an answer to this, has anyone had anything similar.
Solarworld 255w Poly panels.
Many thanks.
So we have 1 string of 9 panels in series.
The roof was like this with each letter corresponding to a panel.
[A]--[C]
[DORMA WINDOW]
[D]-[E]-[F]-[G]-[H]-
ABC panels in landscape, the rest portrait.
All panels at same degree, maybe some shading on the D-I panels due to trees, maybe this is why I got this problem.
Right so my inverter was in the loft, I took one cable to panel C, the other leg to panel I, and then a man made link from D-A... back in the loft I had my meter on my legs testing for voltage and I only seen 105V DC max. Could not work it out at all, done over 100 solar installs and never seen this.
To get round this after a few hours of frustration, I made ABC into a circuit and D-I in a circuit and then made that into a series circuit in the loft (connecting + from top with - from bottom), thus giving me 300V roughly, what I was looking for in the first place!
I need an answer to this, has anyone had anything similar.
Solarworld 255w Poly panels.
Many thanks.