Hour 23 · 2026-05-29
Illustrative clearing — production MMS would use a SCED-class optimiser.
In hour 23, the SMP cleared at R836.77 / MWh. The marginal offer was Eskom Holdings — coal fleet (Generator)'s — the last unit of generation needed to meet demand. By uniform-price rule, every accepted seller was paid R836.77 / MWh for their share of the 26000 MWh cleared this hour.
See the in-browser verifier to confirm the SMP from the receipt's canonical inputs.
Supply curve · demand intersection
The supply curve (terracotta) is cumulative MWh on the x-axis, offer price on the y-axis. The dashed green line is hourly demand. Where they cross is the SMP.
Accepted awards
| Offer | Party | MWh awarded | Price (R/MWh) |
|---|---|---|---|
| o-23-renew-agg | Aggregator — renewables pool | 300.0 | R836.77 |
| o-23-wind | IPP — wind plant (Generator) | 1026.0 | R836.77 |
| o-23-coal | Eskom Holdings — coal fleet (Generator) | 24674.0 | R836.77 |
Show full computation transcript
[clearHour] day=2026-05-29 hour=23 seed=42 [clearHour] tieBreak=price_asc → ts_asc → party_id_asc [clearHour] demand_mw_min=1560000 [clearHour] accept offer=o-23-renew-agg party=agg_renewables_01 price=38499c volume=18000 cumulative=18000 [clearHour] accept offer=o-23-wind party=gen_ipp_wind_01 price=45779c volume=61560 cumulative=79560 [clearHour] accept offer=o-23-coal party=gen_eskom_coal_01 price=83677c volume=1480440 cumulative=1560000 [clearHour] SMP=83677c marginal=gen_eskom_coal_01
Verify from your laptop (terminal):
curl -s /api/clearing/23/replay > receipt.json && npm run verify -- receipt.json
Or in your browser (no install): /clearing/23/verify
Commit this DAM clear to the append-only SHA-256 chain
(dam_cleared event). Best-effort: with no D1 binding bound
locally this degrades to a "not recorded" marker rather than failing.