Renewables driving ag production down, prices up – study
A recent study shows that the shift to renewable energy sources, such as solar and wind power, has led to increased food prices and a decrease in agricultural output.
Landowner Tom Kidner says the opportunity to diversify farm income, as well as making a positive contribution to helping the country reach its emissions-reductions targets, are his key motivations.
Kidner told Rural News his farm is known to the locals as being among the driest in North Canterbury and has no possibility of irrigation. But he says a recent Massey University study found the areas between the rows of solar panels produced nearly 40% more grass than areas that received no periodic shading at all.
Kidner says the photovoltaic solar panels will be installed in such a way as to allow him to continue to run 80% of his sheep and lamb business under and between the rows.
“With climate change predicted to make droughts more frequent and intense, having the benefits of shading from the panels could make a really positive difference to the productivity of the whole site,” he says.
The installation will sit close to the Waipara township, stretching about 4km along the north side of State Highway 7 – towards Hanmer Springs and Lewis Pass.
Kidner concedes there may be opposition from people who consider it an eyesore alongside a major tourism route. However, he claims it is just a continuation of changing land use, in a district already transformed by the establishment of many vineyards.
The plan includes extensive tree planting to screen the solar panels from view.
It is being developed by Auckland-based Far North Solar Farm Ltd (FNSF) in partnership with its overseas investors, Aquila Clean Energy Asia Pacific.
Chief executive John Telfer says stakeholder and community consultation is underway and technical studies to assess the viability of the agri-voltaic solar farm model will also be completed.
FNSF says it has “a pipeline” of 1.4 GWp of solar assets planned throughout the country. These include four at more advanced stages – one at Pukenui in the Far North, two in the Bay of Plenty at Edgecumbe and Waiotahe, and another at Foxton in the Horowhenua.
Kidner’s site was specifically chosen because it is flat and close to the Waipara substation for easy connection to the Transpower network. FNSF calls the farm “a pioneering example of modern sustainable land use in the age of renewable energy generation.”
At 135MWp (peak output in MegaWatts) the 200ha solar farm will generate enough clean electricity to power about 28,000 average homes.
Quoting figures from MBIE, Massey University and others, the company says the Waipara installation will produce around 213 GWh (GigaWatthours) per year.
If this is used to power electric vehicles, it would be the same as removing the annual emissions from nearly 14,000 petrol cars.
Telfer says Agri-voltaics is common overseas and is a great way to provide sustainable dual land use development in agricultural areas, especially those prone to drought as North Canterbury can be.
“While our share of renewables is high by world standards, the fact is New Zealand still burns fossil fuels to account for almost 20% of our electricity needs.”
