P
pjcomp
Theory's great but it's only when a problem comes up you really start to learn things..... My relatively low number of installs to date have gone to plan so I'm hoping a few of you out there have hit more problems than me.
Just put up a 14-module rooftop, two strings of 7x245W panels. Al lthe panels checked OK on the ground. When it came time to connect up, one string gives me 242V, the other one 172V. The arithmetic says I've got two duff panels in the second array.
Questions: Am I missing a bit or does it indeed indicate two duff panels? If they tested OK on the ground, what should I be looking for in retest (I'd prefer to have a few ideas before I start pulling the array apart)? All suggestions gratefully received.
PJ
Just put up a 14-module rooftop, two strings of 7x245W panels. Al lthe panels checked OK on the ground. When it came time to connect up, one string gives me 242V, the other one 172V. The arithmetic says I've got two duff panels in the second array.
Questions: Am I missing a bit or does it indeed indicate two duff panels? If they tested OK on the ground, what should I be looking for in retest (I'd prefer to have a few ideas before I start pulling the array apart)? All suggestions gratefully received.
PJ