Buyer settlement

Large customer — EIUG mine

lc_mine_eiug_01

Period: 2026-05-29 (single demo day, 24 hours). Net cost shown is for THIS day only — the iterate-1 ×30 monthly projection has been removed; full month aggregation requires 28–31 distinct fixture days.

Sign convention — energy, NBC, imbalance: negative (charge). CfD: signed (positive = collected from seller, negative = paid to seller).

demand side · Phase 1 Buyer bids are price-taking (illustrative) in Phase 1: the day-ahead clear runs against an exogenous system-load forecast, so a buyer's awarded volume is its scheduled take, not the output of a buyer bid-stack vs supply-stack intersection. The volume the cap is measured against is genuine; the price is set by the supply stack and the load forecast, not by this party's bid. Bid-driven demand clearing is on the roadmap.

illustrative synthetic outturn The Metered and Dev columns are an illustrative synthetic outturn (a flat 2% under-take before 06:00), modelled here independently of the IDM / balancing forecast-slip residual shown on the shadow-day stages. The two imbalance models are not yet reconciled, so this deviation and the do-nothing IDM bill are not guaranteed to be the same number. Single-source-of-truth fix is on the roadmap.

CfD-vs-SMP for active bilateral PPAs · non-bypassable charges shown as separate prominent lines (Trading Rules R2 §06.2 / §06.3 / §06.4) · imbalance priced via the §07 placeholder formula (illustrative until R2 confirms). Turn the illustrative just-transition line off .

← Back to single demo day

Third-party volume ramp · Trading Rules R2 §08 WITHIN CAP

55% of the year-4 cap used cap = 50% of baseline

Declared baseline 35 000 MWh/day · third-party (contestable) take 9 600 MWh/day (27% of baseline) · year-4 cap 17 500 MWh/day. Bids beyond this cap are rejected server-side at /api/offers (year_n_volume_cap_exceeded). illustrative baseline

Ramp year: Y0 Y1 Y2 Y3 Y4 (20 → 20 → 30 → 40 → 50% glide path)

Hr	SMP	Sched MWh	Metered illustrative synthetic outturn	Dev illustrative	Energy	CfD	NBC	Imbalance	Just-trans	Net cost
00	R847.93	400.0	392.0	-8.00	−R339 172,00	−R1 562,10	−R62 000,00	−R16 000,00	−R10 000,00 illustrative	−R428 734,10
01	R839.99	400.0	392.0	-8.00	−R335 996,00	−R1 800,30	−R62 000,00	−R16 000,00	−R10 000,00 illustrative	−R425 796,30
02	R848.83	400.0	392.0	-8.00	−R339 532,00	−R1 535,10	−R62 000,00	−R16 000,00	−R10 000,00 illustrative	−R429 067,10
03	R851.21	400.0	392.0	-8.00	−R340 484,00	−R1 463,70	−R62 000,00	−R16 000,00	−R10 000,00 illustrative	−R429 947,70
04	R832.05	400.0	392.0	-8.00	−R332 820,00	−R2 038,50	−R62 000,00	−R16 000,00	−R10 000,00 illustrative	−R422 858,50
05	R850.31	400.0	392.0	-8.00	−R340 124,00	−R1 490,70	−R62 000,00	−R16 000,00	−R10 000,00 illustrative	−R429 614,70
06	R833.51	400.0	400.0	0.00	−R333 404,00	−R1 994,70	−R62 000,00	R0,00	−R10 000,00 illustrative	−R407 398,70
07	R854.47	400.0	400.0	0.00	−R341 788,00	−R1 365,90	−R62 000,00	R0,00	−R10 000,00 illustrative	−R415 153,90
08	R862.87	400.0	400.0	0.00	−R345 148,00	−R1 113,90	−R62 000,00	R0,00	−R10 000,00 illustrative	−R418 261,90
09	R842.91	400.0	400.0	0.00	−R337 164,00	−R1 712,70	−R62 000,00	R0,00	−R10 000,00 illustrative	−R410 876,70
10	R851.80	400.0	400.0	0.00	−R340 720,00	−R1 446,00	−R62 000,00	R0,00	−R10 000,00 illustrative	−R414 166,00
11	R862.87	400.0	400.0	0.00	−R345 148,00	−R1 113,90	−R62 000,00	R0,00	−R10 000,00 illustrative	−R418 261,90
12	R856.18	400.0	400.0	0.00	−R342 472,00	−R1 314,60	−R62 000,00	R0,00	−R10 000,00 illustrative	−R415 786,60
13	R864.54	400.0	400.0	0.00	−R345 816,00	−R1 063,80	−R62 000,00	R0,00	−R10 000,00 illustrative	−R418 879,80
14	R849.56	400.0	400.0	0.00	−R339 824,00	−R1 513,20	−R62 000,00	R0,00	−R10 000,00 illustrative	−R413 337,20
15	R838.83	400.0	400.0	0.00	−R335 532,00	−R1 835,10	−R62 000,00	R0,00	−R10 000,00 illustrative	−R409 367,10
16	R847.37	400.0	400.0	0.00	−R338 948,00	−R1 578,90	−R62 000,00	R0,00	−R10 000,00 illustrative	−R412 526,90
17	R1091.95	400.0	400.0	0.00	−R436 780,00	R5 758,50	−R62 000,00	R0,00	−R10 000,00 illustrative	−R503 021,50
18	R1081.69	400.0	400.0	0.00	−R432 676,00	R5 450,70	−R62 000,00	R0,00	−R10 000,00 illustrative	−R499 225,30
19	R1086.16	400.0	400.0	0.00	−R434 464,00	R5 584,80	−R62 000,00	R0,00	−R10 000,00 illustrative	−R500 879,20
20	R1088.33	400.0	400.0	0.00	−R435 332,00	R5 649,90	−R62 000,00	R0,00	−R10 000,00 illustrative	−R501 682,10
21	R864.37	400.0	400.0	0.00	−R345 748,00	−R1 068,90	−R62 000,00	R0,00	−R10 000,00 illustrative	−R418 816,90
22	R869.65	400.0	400.0	0.00	−R347 860,00	−R910,50	−R62 000,00	R0,00	−R10 000,00 illustrative	−R420 770,50
23	R857.23	400.0	400.0	0.00	−R342 892,00	−R1 283,10	−R62 000,00	R0,00	−R10 000,00 illustrative	−R416 175,10
Net cost · 24-hour demo day									−R10 380 605,70

Sample-month roll-up sample month · ×30

Honest projection: the single 24-hour demo day is replayed ×30 with a small deterministic per-day demand/price perturbation (seeded — reproducible, no randomness). This is a sample-month model, NOT a genuine 28–31-day metered fixture; treat the totals as indicative scale, not a billed invoice.

Month net cost

−R316 598 452,30

Avg day net

−R10 553 281,74

Month energy

−R260 761 987,89

Month NBC

−R45 382 563,47

Per-day breakdown (30 days)

Day	Demand/price factor	Net cost
1	×1.057	−R10 972 107,21
2	×1.082	−R11 228 015,66
3	×1.066	−R11 064 005,93
4	×1.032	−R10 713 278,09
5	×1.116	−R11 588 824,53
6	×1.078	−R11 194 749,03
7	×1.016	−R10 543 145,18
8	×0.936	−R9 714 784,75
9	×0.931	−R9 666 123,00
10	×1.029	−R10 684 706,08
11	×0.930	−R9 650 837,18
12	×1.018	−R10 567 009,64
13	×0.935	−R9 702 957,91
14	×1.008	−R10 459 429,57
15	×0.948	−R9 841 446,14
16	×1.100	−R11 423 735,62
17	×0.976	−R10 134 283,75
18	×0.974	−R10 105 963,30
19	×1.093	−R11 348 305,42
20	×1.069	−R11 094 702,46
21	×0.938	−R9 734 126,87
22	×1.043	−R10 823 809,16
23	×0.920	−R9 555 122,38
24	×1.092	−R11 340 760,73
25	×1.075	−R11 162 636,38
26	×1.067	−R11 080 053,83
27	×1.017	−R10 554 692,92
28	×1.009	−R10 478 158,60
29	×1.028	−R10 668 844,49
30	×0.915	−R9 501 836,49
Sample-month net cost		−R316 598 452,30

Forecast-slip downside Indicative under-take exposure for this party at ±1%, 2%, 5% deviation is computed from the §07 placeholder formula (max(SMP × 1.15, R2 000/MWh)). Final imbalance formation will be market-based when SAWEM liquidity supports it.

Implied under-delivery penalty: SMP × 1.15 or an R2 000/MWh floor, whichever is higher. The floor binds when the SMP is below R1 739,13/MWh. Illustrative, basis pending NERSA (Trading Rules R2 §07 placeholder).

illustrative The just-transition line above references JET-IP as the actual policy vehicle. NERSA settlement has no statutory hook for this line; it is shown to make the design space visible. No Treasury / NERSA commitment exists.