Every Last Joule · Region record

South Africa Solar

Provenance, tier, and validation record for south-africa-solar. No live curtailment figures on this page — those are on the globe.

Region id: south-africa-solar
Country: ZAF
Waste modality: Solar
Coordinates: 29.00° S, 22.00° E

Measured Data quality

Tier

live · T1a-live-tso

The transmission system operator publishes an hourly series, and the calibration rate comes from the same jurisdiction.

Live TSO feed, own-jurisdiction rate (±2σ from 5-yr backfill, fallback ±15%)

Uncertainty

±15% of peak GW

Regions with a five-year backfill archive use ±2σ of observed annual variance instead of this default fraction.

Published envelope for this tier. See the uncertainty model.

Source provenance

verified · Verified upstream link

The snapshot value comes from a verified upstream feed or anchor.

Source

Eskom Data Portal total hourly renewable generation (PV+CSP columns × 12% curtailment)

https://www.eskom.co.za/dataportal/renewables-performance/total-hourly-renewable-generation/

Tier, provenance, and source are read at build time from src/lib/regions.ts — the same table the globe draws from. The validation record below is generated separately and gated against it by npm run ci:docs-drift.

Validation record

Last updated: 2026-08-20 · Sprint: S1 + HB integration · Paper section: Technical Validation §4.2

Source

Region id: south-africa-solar
Country: ZAF
Tier: live
Kind: solar
Source: Eskom Data Portal total hourly renewable generation (PV+CSP columns × 12% curtailment)
Source URL: https://www.eskom.co.za/dataportal/renewables-performance/total-hourly-renewable-generation/
Loader: (no single-file loader — see multi-region source)
Structural gap: no

Calibration

Rate source documented in: docs/methodology/ (see links below)
Uniform across backfill years: n/a — no backfill

Multi-year backfill annual totals

Year	Backfill rows	Backfill annual TWh	Published TSO annual TWh	Δ %	Source
(no backfill or TSO anchors yet — will be populated after HB fan-out completes)

Published anchors

TSO annual curtailment (latest published): —
Ember annual: —
IRENA annual: —
Other: —

Discrepancy analysis

No backfill and no solar-only TSO anchor. Region relies on Eskom hourly PV+CSP generation and the aggregate 12% renewable-curtailment calibration.

Known limitations

The Eskom CSV provides hourly renewable generation, not a direct curtailed-energy time series. The solar child isolates PV+CSP columns before applying the 12% aggregate curtailment rate, which improves fuel coherence but does not remove the annual-rate assumption.