VitiVolatics: Vineyards with Photovoltaics

Greetings from the University of Adelaide where I am attending the Sustainability spotlight series (seminar 1) on VitiVolatics, with Professors Cassandra Collins, Armando Corsi and their students. Professor Collins defined VitiVolatics as being about optimising solar power generation and wine quality. In retrospect, the idea seems obvious, and deceptively simple: use solar panels to shade grape vines, providing power while improving growing conditions.

AgrVolatics (Agriculture under PhotoVoltaics) have considerable potential in Australia. As well as the practical aspects, this could be politically useful, by allowing large solar farms which do not stop agricultural production and provide additional income for farmers. This approach is applicable to berries, fruit and leafy vegetables, as well as smaller livestock, but not grains.

An amusing aside in the seminar was that most of the carbon footprint of winemaking comes from packaging, so drink casks wine! ;-) More seriously, the temperature in winemaking regions is increasing, which PV could address. 

It would be interesting to see if the same pre-wired folded panels to be used on the large scale project to export power to Singapore could be used for agriculture. It would also be interesting to see if AgrVolatics are viable in Northern Australia, at a large scale. Interestingly the students have designed an approach to attaching lightweight flexible solar panels to a framework using common off the shelf hardware (steel from local hardware store and electronics from the local hobbyist store). This allows manual installation, compared to the machinery required for heavier rigid panels and the steel mountings used by the solar industry. 

One issue is the aesthetics of large expanses of solar panels across traditional wine growing regions. This seems a little odd, as shade cloth and plastic sheets are already used on a large scale for protecting grapes. However, renewable energy can be triggering for some, so requires research.

Interestingly University of Adelaide is not just researching the engineering and viticulture of PV panels over grape vines, but how to market this to wine drinkers. The idea is to sell the resulting wine using a positive environmental message about carbon emissions. 

At question time I asked if green coloured solar panels would be more acceptable. This is possible using coloured film over conventional blue cells, without a large loss in efficiency. It would make the panels much less visible.