Hour 18 · 2026-05-29
Illustrative clearing — production MMS would use a SCED-class optimiser.
In hour 18, the SMP cleared at R2191.65 / MWh. The marginal offer was Eskom Holdings — OCGT peaker (Generator)'s — the last unit of generation needed to meet demand. By uniform-price rule, every accepted seller was paid R2191.65 / MWh for their share of the 32812 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-18-solar | IPP — solar BW5 (Generator) | 407.0 | R2191.65 |
| o-18-renew-agg | Aggregator — renewables pool | 300.0 | R2191.65 |
| o-18-wind | IPP — wind plant (Generator) | 1505.0 | R2191.65 |
| o-18-coal | Eskom Holdings — coal fleet (Generator) | 30000.0 | R2191.65 |
| o-18-zesa | Cross-border — ZESA interconnect | 200.0 | R2191.65 |
| o-18-ocgt | Eskom Holdings — OCGT peaker (Generator) | 400.0 | R2191.65 |
Show full computation transcript
[clearHour] day=2026-05-29 hour=18 seed=42 [clearHour] tieBreak=price_asc → ts_asc → party_id_asc [clearHour] demand_mw_min=2160000 [clearHour] accept offer=o-18-solar party=gen_ipp_solar_bw5_01 price=36189c volume=24420 cumulative=24420 [clearHour] accept offer=o-18-renew-agg party=agg_renewables_01 price=40822c volume=18000 cumulative=42420 [clearHour] accept offer=o-18-wind party=gen_ipp_wind_01 price=43736c volume=90300 cumulative=132720 [clearHour] accept offer=o-18-coal party=gen_eskom_coal_01 price=84956c volume=1800000 cumulative=1932720 [clearHour] accept offer=o-18-zesa party=cb_zesa_synthetic price=110833c volume=12000 cumulative=1944720 [clearHour] accept offer=o-18-ocgt party=gen_eskom_ocgt_01 price=219165c volume=24000 cumulative=1968720 [clearHour] SMP=219165c marginal=gen_eskom_ocgt_01
Verify from your laptop (terminal):
curl -s /api/clearing/18/replay > receipt.json && npm run verify -- receipt.json
Or in your browser (no install): /clearing/18/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.