After April's wobble, May 2026 looks like a partial recovery on paper — but it's a shallow one, propped up by a still-broken Koeberg and the lowest May demand on record.

May 2026 saw:

• EAF recover to 65.8% (from 60.1% in April), but still below January–March
• Nuclear output get worse — averaging just 645 MW, with Koeberg running a unit at reduced capacity for a whole month
• A one-day OCGT peak of 2.9 GW, the highest in months — though average use stayed minimal
• Demand fall to 21,249 MW — the lowest May on record, below even Covid-2020

There have been many media statements around the end of the financial year about how well things are going at Eskom. In reality, things have not been going this badly in a while.

April 2026 saw:

• Worst EAF since May 2025
• Highest unplanned outages since July 2025
• Highest total outages since June 2025

Eskom Data - February 2026

Small reversal in the headline metrics - unplanned losses up a bit, EAF down a bit to below 70% again, but nothing too concerning here

Eskom data - January 2026

We skipped December as Eskom stopped publishing data in November and didn't fix it for several weeks.

Starting with a highlight: best EAF in January since June 2020!

Eskom data - November 2025

End of Diesel? According to the data, we never generated more than 350MW with the OCGT backup generators, which is the lowest I have on record except for nov 2020 which might also be a glitch.

Eskom data - October 2025

Not anything too interesting this month - EAF down again due to an increase in unplanned outages, but still 'ok' overall.

Eskom data - September 2025

Another dip in unplanned outages takes us close to 2020 levels!

Eskom data - August 2025 (finally)

I finally got a reply to my data request for August data (usually takes a few hours / days, this time several weeks)

Metrics looking good compared to the last few months, but not that far off where we were a year ago.

Very nice dip in unplanned outages.

Eskom data - July 2025

Sorry I missed June, I was travelling.

July is looking positive! Big decrease in total loss, and this time it's in the good way (decrease in unplanned, increase in planned)

Eskom data - May 2025

• Unplanned outages still looking bad
• Small bump from new wind installations
• Diesel use trending down again

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