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cowlinator t1_ive8pvd wrote

Reply to comment by RestlessAmbivert in Rooftop solar trumps all fossil fuels as renewables smash more records on main grid [Australia] by EnergyTransitionNews

Pumped hydroelectricity storage is 87% efficient, but requires huge reservoirs. A brand new lithium ion battery is 88% efficient, but this goes down significantly over the battery lifespan. The efficiency of mechanical gravity storage systems varies widely but is usually under 80%

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