BrightGridShading is one of the most important factors to consider when designing solar panels. Even partial shading can affect the energy produced by an array depending on the electrical configuration.
Common sources of solar shading
- Trees
- Chimneys
- Dormers
- Neighbouring buildings
- Roof structures
- Satellite equipment
Trees can change after installation
A roof that receives excellent sunlight today may experience more shading as nearby trees grow. This is why long-term site assessment is valuable.
Can optimisers help?
Module-level power electronics can sometimes improve the management of arrays with uneven shading, depending on the system design.
What about microinverters?
Microinverter systems convert electricity at individual panel level and can be useful in certain complex roof designs. The best approach depends on the site.
Do not hide shading in the proposal
A good solar design should clearly explain significant shading assumptions and how they have been incorporated into the generation estimate.
Assess a shaded roof
Find out how shading could affect your solar generation and which design options may help.
Assess My RoofFrequently asked questions
Can solar panels work with shading?
They can still generate electricity, but shading can reduce output. The effect depends on the amount and location of shade and the electrical design.
Do solar optimisers help with shading?
They can improve energy management in some shaded installations, but the benefit depends on the specific roof and system.
Should I remove a tree for solar panels?
Tree removal should not be assumed. The installer should first assess shading and alternative system designs.
Does chimney shade affect solar?
Yes. Chimneys can create partial shading and should be considered during panel layout and generation modelling.
Peter Aldridge
Solar Design Consultant at BrightGrid Energy
