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Adding 5 More Panels to My Growatt Inverter – Second String Questions on Specs, Cabling & Configuration

 
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Solar Photovoltaic (PV)
Last Post by Transparent 3 hours ago
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 David999
(@david999)
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Topic starter 24/04/2026 5:37 pm  
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 David999
(@david999)
Reputable Member Member
Joined: 2 years ago
Posts: 324
Topic starter 24/04/2026 5:39 pm  

Might get the other boxes up tomorrow, any advice on distance from the ones you see here, I’m trying to stay away from that hedge although I might chop it down a bit if it’s an issue 



   
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 David999
(@david999)
Reputable Member Member
Joined: 2 years ago
Posts: 324
Topic starter 24/04/2026 5:49 pm  

One other point.  Can the panels sit on the tubs without the cables attached or will they get toasted. 



   
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Transparent
 Transparent
(@transparent)
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Posts: 3157
24/04/2026 6:37 pm  

There are just too many unknowns for me to comment on panel positioning.

You refer to the roof having a low point, which suggests it's sloping.
We also don't know the angle at which the panel is held by each box.

Those measurements need taking into account when you decide where the remaining two panels are placed.

If you're wanting to have sunlight on the panels during bright winter days, then the sun's azimuth above the horizon at midday will be about 15°.
It depends on your latitude of course.

I'd be drawing this out on paper in order to decide where the panels sit in order to avoid the front ones casting shadows on the others.

 

1.9m width is huge for a solar panel.
Is that within the advertised specification for your mounting boxes?

Most solar panels are 1.0 x 1.6m and weigh just over 20kg.
That's to ensure they come within Health and Safety guidelines for a one-man lift.

 

Yes, it's ok to position the panels without any of the electrical connections being made.

Just remember that they are 'live' when you eventually come to connect them!


This post was modified 3 hours ago by Transparent

Save energy... recycle electrons!


   
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