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Renewables and reactive power

A transition to higher penetration renewables is going to require much more attention to electricity networks. Most of the generator ancillary services have been essentially built into systems by virtue of using large synchronous generators. An earlier post explored...

Electricity generation will be modular

The delivery of Elon Musk’s battery is a triumph of modularity. Musk promised the South Australian Government that he would deliver the battery in 100 days and completed ahead of the deadline. Furthermore, wind and solar projects are regularly being delivered in 2...

Ferroni and Hopkirk revisited

Ferroni and Hopkirk published a paper last year titled ‘Energy Return on Energy Invested (ERoEI) for photovoltaic solar systems in regions of moderate insolation’. They concluded that the EROI of solar PV in Switzerland was below 1:1, or a net energy loss. Not...

The dual identity of rooftop solar

We usually purchase energy, not because we value energy per-se, but because we value the energy services they provide – natural gas because we want warm homes or petrol because we want to get somewhere. The curious thing about solar is that many consumers are...