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0 pointsazernik4y ago0 comments

100 hours = (kWh/kg) / (kW/kg) - ie capacity divided by the most cost-effective discharge rate.

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I agree but that’s a highly misleading number because there’s a conflation of scenarios. Capacity is one thing, useable capacity at the requested discharge rate is another. You can’t pick and choose which numbers to use.

azernikOP4y ago

The combination of duration class and capacity is useful, though. 1MWh of 10-hour storage gives you a very clear idea of usable energy.

amelius4y ago

What if the discharge rate versus cost plot is mostly flat?

azernikOP4y ago

Then typically you'll run it at a higher discharge rate, and has something cheaper with a higher capacity/discharge ratio.

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ComputerGuru4y ago

azernikOP4y ago

The combination of duration class and capacity is useful, though. 1MWh of 10-hour storage gives you a very clear idea of usable energy.

amelius4y ago

What if the discharge rate versus cost plot is mostly flat?

azernikOP4y ago

Then typically you'll run it at a higher discharge rate, and has something cheaper with a higher capacity/discharge ratio.

j / k navigate · click thread line to collapse