Proposal for High Fixed Network Charges Is Wrong on Home Batteries, Dynamic Pricing, and Impact on CER

Why It Matters

If fixed charges rise without accounting for passive CER benefits, household adoption of clean technologies may stall, raising overall system costs and slowing Australia’s emissions‑reduction goals.

Key Takeaways

• AEMC proposes higher fixed network charges despite CER passive benefits.
• Household batteries can lower peak demand even under flat tariffs.
• Existing VPPs already coordinate ~80,000 home batteries, contradicting AEMC assumptions.
• Raising fixed charges may deter solar, battery, and heat‑pump adoption.
• Rigorous modeling needed to capture both passive and dynamic CER impacts.

Pulse Analysis

The AEMC’s latest Pricing Review seeks to reshape distribution‑network tariffs for a consumer‑driven electricity market. By shifting a large share of network charges from variable to fixed components, the regulator aims to simplify billing and fund network upgrades. However, the proposal rests on a narrow view that the bulk of consumer‑energy resource (CER) value—such as rooftop solar, home batteries, and electric‑vehicle charging—only materialises under dynamic pricing schemes. This assumption overlooks the growing evidence that passive, tariff‑agnostic actions can still deliver substantial network benefits.

Household batteries, for instance, can autonomously charge from excess solar generation and discharge during evening peaks, flattening load curves without any price signal. Studies show that even under flat tariffs, such “passive” operation reduces peak demand and defers costly network reinforcement. Moreover, virtual power plants (VPPs) already orchestrate the batteries of roughly 80,000 homes, demonstrating that coordinated DER participation does not depend exclusively on the AEMC’s reforms. Ignoring these existing capabilities risks under‑estimating the real‑world contribution of DERs to network utilisation and emissions reductions.

Policymakers therefore need a more granular modelling approach that separates passive from dynamic effects and accounts for behavioural shifts when fixed charges rise. Higher fixed fees could erode the economic case for solar, storage, heat pumps and EVs, slowing the rollout needed to meet the federal 82% renewable‑by‑2030 target. A balanced tariff design—preserving cost‑reflective signals while recognising passive DER benefits—will better align network revenue with system‑wide efficiency gains, ensuring affordable, low‑carbon electricity for all consumers.