Phase 1 shadow · synthetic · independent  ·  SAWEM Phase 1 Trading Simulator — explainer-grade, not an MMS.  ·  Trading Rules Round 2 (12 April 2026 v01 draft)
Trading day 2026-05-29 virtual hour 00 Auction state: ACCEPTING gate close in 18h:00m DAM clear → IDM re-clear → Balancing → Settlement
SAWEM
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).

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
75% of the year-4 cap used cap = 50% of baseline

Declared baseline 25 600 MWh/day · third-party (contestable) take 9 600 MWh/day (38% of baseline) · year-4 cap 12 800 MWh/day. Bids beyond this cap are rejected server-side at /api/offers (year_n_volume_cap_exceeded). illustrative baseline

Ramp year: Y0Y1Y2Y3Y4 (20 → 20 → 30 → 40 → 50% glide path)

Hr SMP Sched MWh Metered Dev 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 R864.61 400.0 392.0 -8.00 −R345 844,00 −R1 061,70 −R62 000,00 −R16 000,00 −R10 000,00 illustrative −R434 905,70
02 R850.02 400.0 392.0 -8.00 −R340 008,00 −R1 499,40 −R62 000,00 −R16 000,00 −R10 000,00 illustrative −R429 507,40
03 R853.69 400.0 392.0 -8.00 −R341 476,00 −R1 389,30 −R62 000,00 −R16 000,00 −R10 000,00 illustrative −R430 865,30
04 R831.08 400.0 392.0 -8.00 −R332 432,00 −R2 067,60 −R62 000,00 −R16 000,00 −R10 000,00 illustrative −R422 499,60
05 R831.49 400.0 392.0 -8.00 −R332 596,00 −R2 055,30 −R62 000,00 −R16 000,00 −R10 000,00 illustrative −R422 651,30
06 R842.14 400.0 400.0 0.00 −R336 856,00 −R1 735,80 −R62 000,00 R0,00 −R10 000,00 illustrative −R410 591,80
07 R832.98 400.0 400.0 0.00 −R333 192,00 −R2 010,60 −R62 000,00 R0,00 −R10 000,00 illustrative −R407 202,60
08 R847.24 400.0 400.0 0.00 −R338 896,00 −R1 582,80 −R62 000,00 R0,00 −R10 000,00 illustrative −R412 478,80
09 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
10 R837.18 400.0 400.0 0.00 −R334 872,00 −R1 884,60 −R62 000,00 R0,00 −R10 000,00 illustrative −R408 756,60
11 R847.35 400.0 400.0 0.00 −R338 940,00 −R1 579,50 −R62 000,00 R0,00 −R10 000,00 illustrative −R412 519,50
12 R847.99 400.0 400.0 0.00 −R339 196,00 −R1 560,30 −R62 000,00 R0,00 −R10 000,00 illustrative −R412 756,30
13 R841.83 400.0 400.0 0.00 −R336 732,00 −R1 745,10 −R62 000,00 R0,00 −R10 000,00 illustrative −R410 477,10
14 R849.01 400.0 400.0 0.00 −R339 604,00 −R1 529,70 −R62 000,00 R0,00 −R10 000,00 illustrative −R413 133,70
15 R838.92 400.0 400.0 0.00 −R335 568,00 −R1 832,40 −R62 000,00 R0,00 −R10 000,00 illustrative −R409 400,40
16 R865.47 400.0 400.0 0.00 −R346 188,00 −R1 035,90 −R62 000,00 R0,00 −R10 000,00 illustrative −R419 223,90
17 R2188.35 400.0 400.0 0.00 −R875 340,00 R38 650,50 −R62 000,00 R0,00 −R10 000,00 illustrative −R908 689,50
18 R2191.65 400.0 400.0 0.00 −R876 660,00 R38 749,50 −R62 000,00 R0,00 −R10 000,00 illustrative −R909 910,50
19 R2219.54 400.0 400.0 0.00 −R887 816,00 R39 586,20 −R62 000,00 R0,00 −R10 000,00 illustrative −R920 229,80
20 R2196.73 400.0 400.0 0.00 −R878 692,00 R38 901,90 −R62 000,00 R0,00 −R10 000,00 illustrative −R911 790,10
21 R845.94 400.0 400.0 0.00 −R338 376,00 −R1 621,80 −R62 000,00 R0,00 −R10 000,00 illustrative −R411 997,80
22 R853.57 400.0 400.0 0.00 −R341 428,00 −R1 392,90 −R62 000,00 R0,00 −R10 000,00 illustrative −R414 820,90
23 R836.77 400.0 400.0 0.00 −R334 708,00 −R1 896,90 −R62 000,00 R0,00 −R10 000,00 illustrative −R408 604,90
Net cost · 24-hour demo day −R11 986 901,50

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
−R365 588 923,48
Avg day net
−R12 186 297,45
Month energy
−R313 724 659,42
Month NBC
−R45 382 563,47
Per-day breakdown (30 days)
Day Demand/price factor Net cost
1 ×1.057 −R12 669 932,01
2 ×1.082 −R12 965 439,75
3 ×1.066 −R12 776 051,14
4 ×1.032 −R12 371 051,65
5 ×1.116 −R13 382 080,21
6 ×1.078 −R12 927 025,43
7 ×1.016 −R12 174 592,36
8 ×0.936 −R11 218 051,36
9 ×0.931 −R11 161 859,68
10 ×1.029 −R12 338 058,40
11 ×0.930 −R11 144 208,54
12 ×1.018 −R12 202 149,60
13 ×0.935 −R11 204 394,43
14 ×1.008 −R12 077 922,59
15 ×0.948 −R11 364 312,34
16 ×1.100 −R13 191 445,44
17 ×0.976 −R11 702 463,68
18 ×0.974 −R11 669 760,91
19 ×1.093 −R13 104 343,15
20 ×1.069 −R12 811 497,66
21 ×0.938 −R11 240 386,48
22 ×1.043 −R12 498 686,30
23 ×0.920 −R11 033 682,82
24 ×1.092 −R13 095 631,00
25 ×1.075 −R12 889 943,68
26 ×1.067 −R12 794 582,30
27 ×1.017 −R12 187 926,99
28 ×1.009 −R12 099 549,74
29 ×1.028 −R12 319 742,38
30 ×0.915 −R10 972 151,46
Sample-month net cost −R365 588 923,48
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.

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.