Jump to content

Shading..do I worry.


Thunderdolt

Recommended Posts

I am having a structure erected for my 10 x 600W Canadian solar panels connecting to a Sunsynk 8Kw.

Facing NNW approx.

Panels specs VoC 41.3 , IsC 18.47

MPPT specs 125V - 425V

Unfortunately at this time of the year the panels 1,2,3 in my diagram will be shaded for about 45 minutes at midday.

Would it be better to put panels 1 to 4 on one string to MPPT 2 and 6 on MPPT 1 or just put all 10 on one string? Or maybe 5 on each MPPT?

What would be the better solution?

 

panelshadeing.jpg

Link to comment
Share on other sites

7 hours ago, Thunderdolt said:

Panels specs VoC 41.3 , IsC 18.47

I also don’t think 10 on one string would be advisable as you’re going to exceed the MPPT max voltage and margin. 10 panels give a Voc of around 500V (I think the spec you quote is the Vmp, not the Voc…). That would effectively limit you to 9 panels on a string unless you split them into the two MPPTs. 

Link to comment
Share on other sites

These larger Wattage panels do have a lower Voc, and a high  Isc, so 10 on a string will be OK, and the 8.8 kW SunSynk can handle the current.

As @mzezman suggests try 5 per MPPT, and see how that works for a bit. If you are a DIY, after a week try all 10 on 1 MPPT. Compare the difference and then decide.

Another option is to cut down the offending shade. 😂

Link to comment
Share on other sites

10 hours ago, TimCam said:

Another option is to cut down the offending shade. 😂

I wish I could, it has taken me an age to determine the best position to build a structure due to ideal roofs (3 of) being shaded extensively by huge trees on the surrounding properties which will cost an arm and a leg to fell and neighbours are not co-operative, wanting to retain the trees for which I am actually in sympathy with as the trees are mainly indigenous and magnificent.

Property buying tip No.1 ...Look at the shading before wasting time looking at the house.....LOL

Link to comment
Share on other sites

3 hours ago, Thunderdolt said:

I wish I could, it has taken me an age to determine the best position to build a structure due to ideal roofs (3 of) being shaded extensively by huge trees on the surrounding properties which will cost an arm and a leg to fell and neighbours are not co-operative, wanting to retain the trees for which I am actually in sympathy with as the trees are mainly indigenous and magnificent.

Property buying tip No.1 ...Look at the shading before wasting time looking at the house.....LOL

I have always taken the point of view that if anything overgrows my property, I can cut it back for any reason I like. Neatness of appearance, making a mess on my lawn, shade, whatever. But the law says that I have any sort of plant on my property, it is incumbent on me to address any reasonable complaints from neighbours about a nuisance that results.

There are papers you will find via a google that record court cases between neighbours. As a bare minimum the court will require that the request be on reasonable grounds, that the plaintiff approached the other party and tried to have a civil discussion, and that the plaintiff can prove on balance of probability (as it will be a civil case) that the trees/shrubs are the cause of the problem.

Link to comment
Share on other sites

30 minutes ago, Bobster. said:

I have always taken the point of view that if anything overgrows my property, I can cut it back for any reason I like. Neatness of appearance, making a mess on my lawn, shade, whatever. But the law says that I have any sort of plant on my property, it is incumbent on me to address any reasonable complaints from neighbours about a nuisance that results.

There are papers you will find via a google that record court cases between neighbours. As a bare minimum the court will require that the request be on reasonable grounds, that the plaintiff approached the other party and tried to have a civil discussion, and that the plaintiff can prove on balance of probability (as it will be a civil case) that the trees/shrubs are the cause of the problem.

I doubt that spoiling one's view is a valid reason but having a financial loss due to shade would that be a valid reason obvious within reason without cutting the tree down but just trimming? 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...