a 9 panel in-series single string Array?
- Thread starter PoPoShoo
- Start date
FilterGuy
Solar Engineering Consultant - EG4 and Consumers
Yes. Have you calculated the string voltage? Is it low enough for the inverter after adjusting for cold?
mrzed001
Voice of reason
And high enough for the Vmpp to be "near" the inverter's MPPT's ideal V point 
Yes, all calculations completed. Our entire panel system is 33 modules, 3 arrays are 8 panel strings, the 4th array (see attached) is 9 panel string (so, this is why I'm inquiring on if my wiring config is correct)
FilterGuy
Solar Engineering Consultant - EG4 and Consumers
Is the 9-panel string going to be on a different controller?
OzSolar
Whatever you did, that's what you planned.
OzSolar
Whatever you did, that's what you planned.
If I understand your question.... Here's 9 modules in series. Others will quickly start a dogpile on me if I'm wrong. LOL
So series is as simple as negative to positive or vice versa. You have some some series/parallel stuff going on in your diagram. You might should check your 8 module wiring diagram at this point.
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OZ solar, I was going off a 9 panel wired in series diagram on the web...problem is, it just showed each panel connected to the other.
So..yea, I was wondering about the pos to pos and neg to neg connections. THNX for catching it and veryifying my doubts
So..yea, I was wondering about the pos to pos and neg to neg connections. THNX for catching it and veryifying my doubts
OzSolar
Whatever you did, that's what you planned.
So the next question is what are you doing? Grid ties, no batteries?
FilterGuy
Solar Engineering Consultant - EG4 and Consumers
Wow, How did I miss that? Sorry.
Here is another layout that may avoid having to put extensions on the PV wires.
ToBeSolar
New Member
Does an odd number of panels create an inbalance or does it matter?
Geees---- There are a bunch of potential problems at least if the OP's planned system changes from 24 panels to 33.
1) is the system grid tied? If so, does his power provider allow him to make the changes?
2) Don't know the NMOT panel wattages and the inverter maximum continuous output power
3) How is the connection to the grid (if grid connected) made complying with the 120% bus rule.
4) Does his local government allow him to make these changes OR if a new system?--ie both building and electrical code compliance verification by inspectors.
Those are basic questions that need consideration before doing anything.
1) is the system grid tied? If so, does his power provider allow him to make the changes?
2) Don't know the NMOT panel wattages and the inverter maximum continuous output power
3) How is the connection to the grid (if grid connected) made complying with the 120% bus rule.
4) Does his local government allow him to make these changes OR if a new system?--ie both building and electrical code compliance verification by inspectors.
Those are basic questions that need consideration before doing anything.
73powerstroke
Solar Enthusiast
Normally I wouldn't say anything but being as this is a grid tie you need to have somebody elsedo it. A certified electrician.
Obviously if you're looking at stuff on the Internet to try and figure out how something needs to be wired in series you lack the practical experience to do this without blowing up yourself or someone else or catching your house on fire.
Please get some help , don't do this yourself.
There are so many things here that are wrong.
Seriously, we don't want to see you get hurt or anything
Ps this is why they now require permits and ul listed equipment. You cannot just see a picture on the internet and not understand the concept and think it'll work for you.
Powerstroke is RIGHT ON and I made part of his post bold because it needed emphases
73powerstroke
Solar Enthusiast
Well hopefully he will get someone to help him. It's ok to learn but not on a grid tie situation.
