Hour 17 · 2026-05-29
Illustrative clearing — production MMS would use a SCED-class optimiser.
demand side · Phase 1 This hour clears against an exogenous system-load forecast (the dashed green demand line below), not a buyer bid-stack vs supply-stack intersection. Buyer bids are price-taking (illustrative) in Phase 1: they fix each buyer's scheduled volume but do not set the SMP. Bid-driven demand clearing is on the roadmap.
In hour 17, the SMP cleared at R1091.95 / MWh. The marginal offer was IPP — battery storage (BESS) (Generator)'s — the last unit of generation needed to meet demand. By uniform-price rule, every accepted seller was paid R1091.95 / MWh for their share of the 36000 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-17-solar | IPP — solar BW5 (Generator) | 790.0 | R1091.95 |
| o-17-renew-agg | Aggregator — renewables pool | 3000.0 | R1091.95 |
| o-17-wind | IPP — wind plant (Generator) | 1514.0 | R1091.95 |
| o-17-coal | Eskom Holdings — coal fleet (Generator) | 30000.0 | R1091.95 |
| o-17-bess | IPP — battery storage (BESS) (Generator) | 696.0 | R1091.95 |
Show full computation transcript
[clearHour] day=2026-05-29 hour=17 seed=42 [clearHour] tieBreak=price_asc → ts_asc → party_id_asc [clearHour] demand_mw_min=2160000 [clearHour] accept offer=o-17-solar party=gen_ipp_solar_bw5_01 price=36941c volume=47400 cumulative=47400 [clearHour] accept offer=o-17-renew-agg party=agg_renewables_01 price=39301c volume=180000 cumulative=227400 [clearHour] accept offer=o-17-wind party=gen_ipp_wind_01 price=45357c volume=90840 cumulative=318240 [clearHour] accept offer=o-17-coal party=gen_eskom_coal_01 price=85185c volume=1800000 cumulative=2118240 [clearHour] accept offer=o-17-bess party=gen_bess_ipp_01 price=109195c volume=41760 cumulative=2160000 [clearHour] SMP=109195c marginal=gen_bess_ipp_01
Verify from your laptop (terminal):
curl -s /api/clearing/17/replay > receipt.json && npm run verify -- receipt.json
Or in your browser (no install): /clearing/17/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.