On this page...

Agrivoltaics
Related pages

Integration of solar PV with other uses

The relevant definition of integration for this page is "The action or process of combining two or more things in an effective way".

At the time of writing this page solar photovoltaic power installations have, with a few significant exceptions, been aimed solely at generating electricity.

There is enormous potential to integrate solar PV power with other purposes. The current failure to do this is a huge lost opportunity.


This page was started 2022/01/04
Contact: David K. Clarke – ©
 


This is a work
in progress


 
Solar car park
Solar car park shade at Flinders University, Adelaide, South Australia
 
An early pilot floating solar power installation
floating solar
On common effluent ponds at Jamestown in Mid-North South Australia. Photo 2016/12/12
At the time of writing probably 90% or more of solar PV installations have been aimed solely at generating electricity, either on roofs or in solar 'farms'. The roof-top installations have mostly been added to a house as an afterthought, very few have been added as an integrated part of the roof.

Currently the most common example of a secondary use of solar panels is in the provision of shade, mainly for car parks.

Another secondary use of solar panels is to float them on water in order to reduce evaporation from water bodies. This can have another value in reducing the temperature of the panels, increasing their efficiency.

Another potential use of solar PV panels is for Heating: collecting the heat from solar panels and putting it to use; again increasing the efficiency of the panels by reducing their temperature.

Some progress has been made toward integrating solar power with roofing; for example see Solar roof tiles - solar panel alternatives, Choice article. Some of these also pre-heat water.

Amy Feldman wrote an article for Forbes on 2022/01/03 about integrated solar roofing produced by GAF, a big roofing provider in the USA.

Agrivoltaics (or agrisolar), combining solar panels with agriculture

At the time of writing the term Agrivoltaics seems to be used in the USA while Agrisolar is used in Australia.

My country, Australia, has more potential for agrisolar than most because we have abundant space; unlike places like Japan we don't have to get every possible megawatt of power per hectare, we can easily spread out our rows of solar panels and make room for crops or grazing either under or between the rows. Also, we have abundant sunlight and, in many areas, more than enough heat for many crops.

 

Research in Australia?

The Clean Energy Council has collected summaries of agrisolar trials and projects around Australia.
Some shade can be advantageous for many crops in Australia. Partial shade lowers temperatures and conserves soil moisture.

And shade is greatly appreciated by sheep on hot days. (Shade is often not provided for livestock in some farming areas in Australia's hot climate; this is unethical.) Shade for stock could be provided by solar panels.

I would go so far as suggesting that all large solar farms should have provision for grazing (or some other form of farming) in combination with the solar panels. Not only would it increase productivity, it would be better for the soil than having the earth beneath the panels bare.

Grapes under solar panels

Growing wine or table grapes beneath solar panels has the advantage of limiting frost damage, reducing heat stress and conserving soil moisture. However, it also reduces access to machinery for spraying and harvesting.

Are protective solar panels the future for French vineyards?


External pages on agrivoltaics

Related pages on general solar integration is below

Australian Guide to Agrisolar for Large-scale Solar, for proponents and farmers; Clean Energy Council, March 2021, pdf, 48 pages.

Includes sections on:

  • Guidance for Solar Grazing and
  • Other Emerging forms of Agrisolar, including:
    • Horticulture;
    • Biodiversity and Bees;
    • Floriculture;
    • Aquaculture;
    • Viticulture;
  • Resources.
This is the most extensive guide I've found to the combined use of agriculture and solar PV at the time of writing (January 2022).


French company Neoen have a page about agrisolar at their Numurkah Solar Farm in Victoria. It includes an informative video that discusses how merino wethers are grazed beneath and around the panels. The land owner claims that the land has been made more productive by the presence of the panels. Neoen is one of the biggest wind and solar energy developers in Australia.


Combining Solar Panels With Agriculture Makes Land More Productive, Clean Technica, written by Steve Hanley, 2017/11/24.


Growing Crops Under Solar Panels? Now There’s a Bright Idea"
"In the new scientific (and literal) field of agrivoltaics, researchers are showing how panels can increase yields and reduce water use on a warming planet.

In Jack's Solar Garden in Boulder County, Colorado, owner Byron Kominek has covered 4 of his 24 acres with solar panels. The farm is growing a huge array of crops underneath them—carrots, kale, tomatoes, garlic, beets, radishes, lettuce, and more. It’s also been generating enough electricity to power 300 homes. “We decided to go about this in terms of needing to figure out how to make more money for land that we thought should be doing more,” Kominek says."
A related page: Why combining farms and solar panels could transform how we produce both food and energy.

Australian solar park to host crops as part of agrisolar program; PM Magazine article, written by David Carroll, 2021/06/11. "Italy’s Enel will launch an experimental agrivoltaics program at its 34 MW Cohuna Solar Farm in the Australian state of Victoria to help formulate a “best practices” template for utility-scale solar PV sites in other countries."






Related pages

Related pages on external sites...

Future of Solar Photovoltaics, IRENA, November 2019. Of especial interest in the context of this page is the section on 'Applications: beyond fields and rooftops'.

Solar roof tiles - solar panel alternatives, Choice article.



Also see External pages on agrivoltaics


Related pages on this site...

Solar shaded car parks