Hour 12 · 2026-05-29
Illustrative clearing — production MMS would use a SCED-class optimiser.
In hour 12, the SMP cleared at R847.99 / 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 R847.99 / MWh for their share of the 31000 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-12-solar | IPP — solar BW5 (Generator) | 1688.0 | R847.99 |
| o-12-renew-agg | Aggregator — renewables pool | 300.0 | R847.99 |
| o-12-wind | IPP — wind plant (Generator) | 1119.0 | R847.99 |
| o-12-coal | Eskom Holdings — coal fleet (Generator) | 27893.0 | R847.99 |
Show full computation transcript
[clearHour] day=2026-05-29 hour=12 seed=42 [clearHour] tieBreak=price_asc → ts_asc → party_id_asc [clearHour] demand_mw_min=1860000 [clearHour] accept offer=o-12-solar party=gen_ipp_solar_bw5_01 price=38780c volume=101280 cumulative=101280 [clearHour] accept offer=o-12-renew-agg party=agg_renewables_01 price=41976c volume=18000 cumulative=119280 [clearHour] accept offer=o-12-wind party=gen_ipp_wind_01 price=46372c volume=67140 cumulative=186420 [clearHour] accept offer=o-12-coal party=gen_eskom_coal_01 price=84799c volume=1673580 cumulative=1860000 [clearHour] SMP=84799c marginal=gen_eskom_coal_01
Verify from your laptop (terminal):
curl -s /api/clearing/12/replay > receipt.json && npm run verify -- receipt.json
Or in your browser (no install): /clearing/12/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.