Comparing Solar Power In Summer And Winter ..........

Exwindsurfer

Full Member

Messages
1,145
Very interesting thread. Thanks for posting Colin.
Out of interest when angling the solar panel could you use mirror deflection on to the solar panel to enhance performance? Has anyone tried this?
Cheers. David.
David i think it would be much easier to tilt the panels lolol
 

Wully

Full Member

Messages
1,781
There are some Really clever people on here I’ve just read this all the way through wow ma heeds pickled. But not as much as Colin’s when I ask him to work this one out what if there are two suns.🤔..1..2 🌞🌞 should keep you Busy for a while. More pencils please.😀 Joking aside I’m impressed with the work you’ve put into this subject.

 

CriftinsCampers

Full Member

Messages
59
Tilting as said makes a significant difference to what can be produced assuming soc of battery actually needs it.
This is mine in Winter mode and the current on that particular day increased by about 500%.

In a Finland the sun is so low they mount their panels on the sides of their houses rather than on the roof
 

Attachments

  • D687C2FF-E318-4481-B6CC-B6B32283A0F0.jpeg
    D687C2FF-E318-4481-B6CC-B6B32283A0F0.jpeg
    334.7 KB · Views: 10

xsilvergs

Full Member

Messages
150
Due to the low elevation of the sun for most of the year, here in the UK, I have consider mounting panels to the sides of the trailer.
 

Exwindsurfer

Full Member

Messages
1,145
Tilting as said makes a significant difference to what can be produced assuming soc of battery actually needs it.
This is mine in Winter mode and the current on that particular day increased by about 500%.

In a Finland the sun is so low they mount their panels on the sides of their houses rather than on the roof
Do you have to climb up to adjust your panel ?
 

Full Member

Full Member

Messages
4,161
Very interesting thread. Thanks for posting Colin.
Out of interest when angling the solar panel could you use mirror deflection on to the solar panel to enhance performance? Has anyone tried this?
Cheers. David.

The idea works and you'll occasionally see this kind of set up, David.
The main problem is that the mirrors need to be moveable in order that, when reflecting sunlight onto the solar panel at one time of the day, they are not shading the solar panel at another time of the day.
In the UK, for instance, in order to reflect sunlight onto the panel in the morning the mirror needs to be sloping up from the horizontal on the west side of the panel and facing east. That means that later in the day as the sun is in the west, the mirror is shading the solar panel.
Now that the cost of solar panels is falling rapidly, it's generally considered more cost effective to install more panels than mirrors - unless the installation is highly specialised and there is no other technical solution.
There's a huge system using mirrors in Spain where an enormous array of steerable mirrors focus sunlight onto a 'furnace' on a tower. It can be seen from kilometres away and as I cycled past it some years ago I was astounded by it:


It should always be remembered that adding any technological complexity (e.g. moving parts, actuators, electronics) to a system adds cost, extends pay-back time, reduces reliability, increases weight etc, etc.
This applies to the system in Spain as much as it does to tilting solar panels on Mohos. It may be worth doing on a Moho if there's no other solution (for instance the power requirement cannot be reduced and/or there isn't sufficient space for static solar panels).

Colin 🙂🙂🙂
 
Last edited:

xsilvergs

Full Member

Messages
150
I think the sun here in Dorset only gets to about 62* elevation. So if the sun rises from ~0* and climbs to 62*, why would you mount a solar panel horizontally? Is 31* from vertical better?
 

Full Member

Full Member

Messages
4,161
I started this thread because I thought it would be interesting to compare a theoretical consideration of winter/summer solar panel output with the anecdotal advice often given for the UK. I then extended this for winter/summer solar panel output at various latitudes.
The thread has now expanded somewhat and my feeling is that I have little else to contribute to the current discussion.
I'll therefore drop out now and leave you guys to enjoy the thread in your own way.
On balance I'm pleased with the feedback on post #1 so when I get time I'll have a go at extending the work I initially posted.

Colin :):):)
 

xsilvergs

Full Member

Messages
150
I started this thread because I thought it would be interesting to compare a theoretical consideration of winter/summer solar panel output with the anecdotal advice often given for the UK. I then extended this for winter/summer solar panel output at various latitudes.
The thread has now expanded somewhat and my feeling is that I have little else to contribute to the current discussion.
I'll therefore drop out now and leave you guys to enjoy the thread in your own way.
On balance I'm pleased with the feedback on post #1 so when I get time I'll have a go at extending the work I initially posted.

Colin :):):)

Colin,
It was a great idea of yours and from what has been said in the replies hopefully it makes others think.
 
Top