Do we have batteries today that can smooth out the fluctuations of sustainable energy sources?

A set of Australian RedFlow batteries. Photo: RF
A set of Australian RedFlow batteries. Photo: RF
Flywheel energy storage sounds incredibly archaic, but advanced FES systems have rotors made of high-strength carbon fibre composites suspended on magnetic bearings. The rotors are housed in a vacuum enclosure where they spin at speeds ranging from 20,000 to more than 50,000 rpm. The flywheels can provide energy in milliseconds, and the use of superconducting materials is also relatively economical (but for this we need high-temperature superconductor HTSC bearings). Faster energy storage is not
Flywheel energy storage sounds incredibly archaic, but advanced FES systems have rotors made of high-strength carbon fibre composites suspended on magnetic bearings. The rotors are housed in a vacuum enclosure where they spin at speeds ranging from 20,000 to more than 50,000 rpm. The flywheels can provide energy in milliseconds, and the use of superconducting materials is also relatively economical (but for this we need high-temperature superconductor HTSC bearings). Faster energy storage is not currently available. Photo of NASA G2 flywheel. Photo: NASA
Usually, an RFB installation occupies the same size as several shipping containers. Photo: RedFlow
Usually, an RFB installation occupies the same size as several shipping containers. Photo: RedFlow
The RedFlow ZBM3 domestic battery is the world’s smallest commercially sold zinc-bromide battery. Weight 240 kg including 100l electrolyte, a size comparable to an air conditioner, 28 Volts DC, high energy density at 10 kWh. Power: 3 kW (5 kW at peak). And above all: the energy capacity is not reduced over time. Photo: RF
The RedFlow ZBM3 domestic battery is the world’s smallest commercially sold zinc-bromide battery. Weight 240 kg including 100l electrolyte, a size comparable to an air conditioner, 28 Volts DC, high energy density at 10 kWh. Power: 3 kW (5 kW at peak). And above all: the energy capacity is not reduced over time. Photo: RF
We have not been able to find exact prices for these household batteries, and you can’t buy them in Europe (could it be a business opportunity?). Yet, RedFlow says the projected payback for their technology combined with solar panels at the Knox Children’s Centre project in Melbourne is around five years. Photo: RF
We have not been able to find exact prices for these household batteries, and you can’t buy them in Europe (could it be a business opportunity?). Yet, RedFlow says the projected payback for their technology combined with solar panels at the Knox Children’s Centre project in Melbourne is around five years. Photo: RF

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