Quantum energy teleportation recast as a resource theory. The free operations are Alice's energy-non-signalling instruments, one-way classical communication, and any channel on Bob's side, and the QET potential (the most energy Bob can receive) is a ledger monotone. Commuting-Kraus instruments are the whole free class exactly when the bond operators' joint eigenvalues are in convex position; there the potential is linear in the state, and two-way communication gives Bob nothing that one-way communication does not. Claims about finite spin and Gaussian models, not quantum fields.