ulrich minnaar @uminnaar
Elec Eng, PhD- Power quality, Power System Reliability, ElectricityRegulation & Policy, Renewables. Views are my own Cape Town, South Africa Joined October 2011-
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Ethiopia's all in on #EVs is going to be interesting to watch. Especially how long distance and heavy trucking develops. They have very cheap electricity because of hydro...
China isn't just exporting EVs anymore, it's exporting electrification. On 29 April 2026, Ethiopia deployed its first fleet of 50 electric heavy-duty trucks at the Bishoftu International Airport megaproject, with another 42 trucks arriving soon. This isn't just about replacing
Opponents of data centres in South Africa can't use electricity as an objection.... SA has excess supply....data centres help dailymaverick.co.za/article/2026-0…
An important step by National Treasury. Looks like the beginning of consolidation in South Africa's electricity Distribution sector Treasury 'advises' 15 municipalities to let Eskom take over -%20%40%20-%20by%20%40AntoinetteSlabb moneyweb.co.za/in-depth/budge…
California is often the US state held up as an example of how to do Renewables..... In reality Texas is a much better example,since they adding RE+BESS without the high electricity prices you find in California....
Other states talk a big game, but Texas builds. Texas is scaling battery storage so fast that it's almost keeping up with the other 49 states… by itself!
@xiaowang1984 I didn't know that anyone needed to say that demand response is not equal to generation🤷🏾♂️. Really.... Demand response is useful and all.... But....
National Treasury's debt relief program had no chance of success because it never addressed the fundamentals of electricity distribution in SA munics. Municipal arrears to Eskom rocketed by 71 percent in one year moneyweb.co.za/in-depth/budge…
Economies of scale on SMRs vs conventional nuclear is always an open question for me. 🤷🏾♂️
“According to data from Wood Mackenzie, by 2030 SMRs should generate power at $182 per megawatt hour compared with $133 per megawatt hour for conventional nuclear. Natural gas is expected to sit at $126 per megawatt hour, while onshore wind and solar, backed up by battery, are
An important chart from @washingtonpost on energy costs – generation has become cheaper, but the cost of delivering energy to consumers across the grid has more than doubled.
@sancrimonious @xiaowang1984 That sounds very low.... Would surprise me. That number might be grid scale BESS. Might be a lot of Behind-the-meter BESS not accounted for.
@xiaowang1984 There is probably an engineer somewhere who wrote that document and recommendations months ago... And it's been parking somewhere getting approval... Never underestimate bureaucracy 🤷🏾♂️🤷🏾♂️. And that setup sounds super bureaucratic
@xiaowang1984 Yup. You have to adapt your operating practice in real time...which AEMO can. That's not happening when you need to ask permission from politicians who have a storyline to sell and don't understand technical or operational realities.
@xiaowang1984 Trying to change settings on 100s/ 1000s of RE plants in a week...Not happening+ plus 100 control centres for a country of Spain's size is interesting. The Spanish system operator does not have license to do what it takes to keep the lights on
If the payback period on a household battery is 14 years in Australia at their electricity prices... What is it in places with much lower electricity prices??🤔🤔. And how do u reduce the payback time?
The Australian Energy Market Commission @the_AEMC just released a puff-piece for household batteries. Which prove that without subsidies, they definitely don't make any economic sense. They couldn't be paid back within warranty period. 1/
@lungile_mashele The discussion around electricity prices in SA needs a lot more nuance. I am not convinced the powers that be or many commentators have a good handle on the causes of price increases or whether electricity prices are high (in some cases yes they are).
@lungile_mashele “Over the next few years, we do expect variable costs to come down, but the proportion of costs that are fixed will rise, which, if unchecked, could exacerbate inequalities that we see today,” Brearley said at the time.
A reminder that customer electricity bills can go up even if generation costs stay the same... Transmission + Capacity costs can outstrip energy cost savings.
@ShanuMathew93 👋It's worth digging into which parts of energy bills are driving cost increases. Our recent analysis with @nrgytariffxpert over a similar timeframe shows that policy choices and utility investments in transmission and distribution have continued to drive overall bill costs
@xiaowang1984 I don't think the immediate use case for most utilities is to be on an equal footing with traditional synchronous generators.... TSO/ DSO will pick up some of the functions as they can create products.... that's a great representation though
@duncancampbell And the more grid u need to add the more expensive the delivery gets.....
THIS is why you need inertia on the grid. Synchronous generators are the flywheel....
Adding a reaction wheel to an RC aircraft carrier to keep it stable.
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