호주 에너지 시장 운영자(AEMO)에 제출된 Green Energy Markets(GEM)의 새로운 보고서에 따르면 호주에서는 옥상 태양광 및 배터리 저장 장치가 앞으로 주도적인 역할을 할 것으로 확인되었으며, 66년까지 누적 PV 용량 잠재력이 98.5GW에서 2054GW에 이를 것으로 예상됩니다.
GEM’s December 2023 report shows that rooftop PV installation forecasts surpass current 41 GW levels of installed capacity in Australia’s National Electricity Market (NEM) for coal, gas and hydro combined, but varies depending on the government’s three decarbonization scenarios.
The scenarios are “Progressive Change,” “Step Change,” and “Green Energy Exports.” Progressive Change would see 43% emissions reduction by 2030 and net zero by 2050. The Step Change scenario is based on consumer-driven investment to maintain temperature below 2 C. Green Energy Exports foresees a limiting of temperature increase to 1.5 C, requiring rapid electrification, green hydrogen production, and bio-methane solutions.
The “Projections for distributed resources – solar PV and stationary energy battery systems” report, found under the Progressive Change model, points to a capacity by 2053/54 of 66 GW, which is higher than the Commonwealth Scientific and Industrial Research Organisation’s (CSIRO) projection used by AEMO for the same period of 48 GW.
Forecasts for the globally favored models, Step Change and Green Energy Exports, landed on a 98 GW capacity from Green Energy Markets projections, and 92 GW from CSIRO.
“No matter which way we cut this, these forecasts indicate we are headed for an amount of rooftop solar capacity (taking into account panel degradation) that is close to, or greater than typical average electricity demand,” Tristan Edis, director of analysis and advisory at Green Energy Markets and the co-author of the report. “Then on top of this we also have solar capacity in solar farms and large commercial installation above 100 kW per system. For many, such a large amount of rooftop solar capacity seems to stretch the boundaries of credibility.”
Edis says there are four reasons to install more rooftop solar capacity than typical total electricity demand across residential customers, but every sector of the economy as well.
“Over time, given that solar panels can last 20 years, we end up with a steady accumulation of more and more capacity, even though overall the number of new sites installing solar each year is expected to decline substantially from what we’ve experience in the last few years,” Edis said.
As capacity grows and curtailment ensues, and the value of solar generation in the wholesale electricity market, along with feed-in tariffs declines, Edis said the caveat is heavily contingent on the price of home battery storage systems also declining.
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