Ongoing ‘Decreasing International Solar PV Prices’.

Simon Batchelor from Gamos writes to continue the theme of global solar PV prices, and their continuing price reduction.

In his blog on Decentralised Solar PV Acceleration in South Africa, my colleague, Mark Borchers, noted that “Where national grid power prices are rising fast, as is the case in many African countries, the decreasing international solar PV prices will sooner or later lead to a situation where it makes sense for businesses to install their own grid-connected rooftop systems.”  In a blog last year “Will Solar Photovoltaics Continue to Decrease their Cost?” we shared some insights into the ‘decreasing international solar PV prices’.

It is well worth keeping an eye on this price descent of solar, and this blog takes the opportunity to refer to a new report by IRENA – The International Renewable Energy Agency. The report “THE POWER TO CHANGE: SOLAR AND WIND COST REDUCTION POTENTIAL TO 2025” focuses on utility scaled activities, nevertheless they present an up to date analysis of solar photovoltaics and suggestions of costs through to 2025.

They confirm that solar PV modules have high learning rates (i.e. cost reductions as technology manufacturers accumulate experience) (18% to 22%) and rapid deployment – there was around 40% growth in cumulative installed capacity in each of 2012 and 2013 and around 30% in 2014 and 2015. These factors resulted in PV module prices declining by around 80% between the end of 2009 and the end of 2015. In 2011, price declines accelerated as oversupply created a buyer’s market. The price declines then slowed between 2013 and 2015 as manufacturer margins reached more sustainable levels and trade disputes set price floors in some markets. Current country average module prices range from USD 0.52 to USD 0.72/W. They believe that module costs are set to continue to fall, and they state that by their reckoning, module costs will have dropped by 42% by 2025.

However these module costs are only part of the system costs. IRENA shows that there are considerable gains to be made by reducing all the other system costs. In their figure 2 (see below) they show some of the balance of system costs for various countries of utility scale PV projects. It is interesting to note that the difference between China and Germany on the one hand and Australia and Japan on the other is a factor of 3. The report suggests that there is considerable room for reducing these balance of system costs further and it is improved efficiencies of installation that will continue to drive the system prices down.

The report also considers the levelised cost of electricity (LCOE), which takes into account the lifetime of the system, the ongoing operation and maintenance costs, as well as the capital investment. They note that the LCOE of solar PV fell 58% between 2010-15, making it increasingly competitive at utility scale. Of course looking ahead there are many unknowns, however their predictions are that utility scale PV could have project costs in the range of USD 0.03 to USD 0.12/kWh by 2025.

This general trend highlighted by the report in the context of utility scale PV nevertheless supports Mark Borchers’ observations on shopping malls and PV. He noted that “a combination of steadily reducing international solar PV prices and consistently higher-than-inflation electricity price hikes” was behind the decision to put solar PV on malls, and that “such installations are now a financial no-brainer – giving an 18% internal rate of return (IRR) with a 5 year payback”. While the IRENA report had a slightly different focus (scale of PV), it nevertheless confirms that PV is likely to continue its price descent, making the IRR for shopping malls in South Africa even better in the coming years.

Mark ends his blog by stating that since this is financially worthwhile, and will inevitably become even more so, he calls for urban areas to think about the “big implications for sustainable energy planning”. We echo that call.



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