Battery storage investment at stake as Australia’s AEMC consults on minimum system load market rules
energy-storage.news Jul 13, 2026

Battery storage investment at stake as Australia’s AEMC consults on minimum system load market rules

AI-summarised brief · reviewed before publication

Australia’s energy market regulator, the Australian Energy Market Commission (AEMC), has opened a consultation on two competing proposals to address minimum system load (MSL) events that occur when high rooftop solar output drives grid demand below safe operating levels. The Reliability Panel suggests automatically setting the NEM spot price to a –AU$1,000/MWh floor during MSL‑3 events to incentivise generators and flexible loads to consume excess power. The Clean Energy Council (CEC) proposes a paid ancillary service market where battery storage, pumped hydro and other flexible loads can bid for load‑reserve contracts, providing AEMO with a transparent, contractual demand‑response tool. The outcome will affect the economics of battery projects such as AGL’s 250 MW Torrens Island BESS, which has already lost arbitrage revenue under ad‑hoc AEMO directives, and could reshape investment risk for new storage capacity across the National Electricity Market.

💡 Why It Matters

  • · A clear, market‑based solution could unlock the capital needed for large‑scale batteries, directly supporting grid stability as solar penetration spikes.
  • · Without it, storage developers face uncertain revenue streams, threatening the NEM’s transition to a low‑carbon mix.