“They are an unbelievable sight:” Fortescue’s first self-lifting wind towers emerge as el... - Renew Economy

Fortescue has deployed self-lifting wind towers at an unspecified location. The towers use a hydraulic system to raise themselves during installation, eliminating the need for heavy mobile cranes on site. The company describes the innovation as reducing logistics complexity and cost at the construction phase.

Where this fits

This is a marginal cost reduction in tower erection, not a solution to the deeper cost problem of a renewables-heavy grid. Wind farms are cheap per megawatt-hour of generation, but that measure masks the whole-system burden: intermittency demands either gas plants standing by to fill the gaps or vast overbuild of transmission to import power from distant wind zones when local output drops. Self-lifting towers shave construction spend on individual projects. They do not address the firming cost, the transmission overbuild, or the materials intensity of a weather-dependent system. The innovation is real. The framing of cost, however, remains narrow.

What it means

Fortescue's engineering effort shows commercial pressure to drive down project costs in a competitive renewables market. That pressure is welcome. But cost-per-megawatt-hour is not cost-per-megawatt-hour-of-firm-power. A grid built chiefly on wind and solar needs either continuous gas backup or a massive and costly transmission network to move power across long distances when the sun sets and the wind stills. Neither is visible in headlines about tower cranes or hydraulic systems. Australia is building an energy system that is weather-dependent, firmed by gas, reliant on Chinese-manufactured panels and batteries, and forgoing the one firm, low-emission, long-lived, low-material alternative that law excludes: nuclear. Incremental engineering wins like self-lifting towers do not alter that structural fact.