Convert congestion into cash

When the transmission network is congested, generators and batteries leave money on the table. TxChange facilitates energy contracts that convert that lost value into shared profit.

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The NEM's regional pricing regime is costing you

When there is congestion, high-cost generators bid as low as possible so that they are dispatched and receive the regional price. Variable renewable generators are curtailed while expensive plant keeps running.

Batteries make matters worse. Facing the same regional price as everyone else, they have no incentive to charge from cheap constrained generation — and often discharge instead, exacerbating the problem.

Result: Curtailed variable renewable generators and unnecessary fossil fuel use, with avoidable costs borne by generators, batteries, and their offtakers. The Energy Security Board estimates the costs will be over $4 billion to 2050.
Problem diagram

Regulatory solutions have stalled. TxChange is a practical, commercial alternative that facilitates voluntary bilateral energy contracts between market participants exposed to congestion.

The thermal or hydro generator buys additional cheap variable renewable output via TxChange instead of generating itself, avoiding fuel costs. The counterparties capture value that the market currently destroys.

Result: The variable renewable generator monetises output it would have lost, the thermal or hydro plant reduces its generation costs, and emissions are reduced.
Scenario A diagram

Instead of discharging to receive the regional price, the battery buys additional renewable generation that would have been curtailed, at an effective price well below the regional price.

Result: The battery charges at low price, the variable renewable generator sells output it would otherwise have lost, and emissions are reduced.
Scenario B diagram

Who TxChange works for

Thermal and hydro generators that currently block cheaper plant behind the same transmission limit

Battery owners behind constraints who are missing out on low-cost charging opportunities

Variable renewable generators whose output is curtailed by network constraints

PPA offtakers of constrained variable renewable generation

Battery developers seeking innovative revenue streams to improve project economics

Government agencies supporting generation and storage assets exposed to curtailment

Why TxChange exists

Before founding TxChange in 2025, Tom Walker spent more than a decade working on regulatory approaches to address the inefficiencies created by the NEM’s regional pricing regime.

TxChange converts that experience into a practical commercial solution that works within the existing market design. Using innovative energy derivative contracts and bespoke software, TxChange determines payments between counterparties — allowing participants to capture value currently lost to congestion while reducing emissions.

Get in touch

We'll come back with a short set of follow-up questions and a time to talk.

Email us at info@txchange.com.au or use the form.