With rapidly declining costs and seemingly unlimited sunshine,
the choice of solar in Australia seems obvious. Yet despite its
many advantages, homes with solar remain completely dependent on
the electricity grid for reliable supply, which in Australia
implies mostly coal-fired generation. Indeed, even countries that
have invested heavily in solar, such as Spain and Germany, have
been unable to deflect the trajectory of fossil fuel
dependence.
The reasons for this apparent paradox are varied, and this book
provides a deeper and more nuanced understanding of the practical
applications of photovoltaics (PV) in modern electricity systems.
While the conventional life-cycle assessment (LCA) boundaries as
prescribed by the IEA-PVPS provide a consistent methodology for
comparing evolving PV technologies, the narrow boundaries exclude
many critical downstream energy costs. Similarly, simple cost
comparisons of PV versus conventional power sources overlook the
significant economic and energy costs of intermittency and grid
integration. Yet distributed storage, which could provide
potentially valuable network support, is frequently given a low
priority by advocates of solar.
Treating PV as an extension of, rather than as a substitute for,
the fossil fuel enterprise enables a more productive discussion of
PV s potential role in electricity generation. The sunburnt country
of Australia, which has a modern electricity system, is an ideal
case study for exploring the potential of solar PV. With a focus on
rooftop solar, energy storage, grid integration, and electricity
system issues, "Energy in Australia" offers valuable insights into
the practical challenges of solar power. Although many national
economies are already confronting a downward trend in energy return
on investment (EROI) of oil and gas from both conventional and
unconventional sources, the large-scale deployment of low-emission
energy sources that lie below a critical minimum EROI threshold may
ultimately prove counter-productive."
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