Month: June 2021
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The costs of storing energy in batteries
The cost of storing energy in batteries is getting less as this report shows, quoting a figure of about $135/kWh for the cost of storage in 2020. That’s about £100/kWh. Nissan Leaf replacement batteryIn the US, a 30 kWh replacement battery costs about $4000, about £3000. That’s £100/kWh – about the same as the Bloomberg…
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There’s nothing we can do about the spread of Covid. 1: the argument from mechanism.
The null hypothesisOnce Covid has spread significantly among a population, normal lockdown actions have no significant effect on the spread of the disease. Definitions of significant and normalBy ‘spread significantly’ I mean the sort of spread that was observable in most countries, the UK in particular, well before there was a general awareness of the…
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UK Covid mortality update April 2021
We are so used to seeing Covid daily death figures in the following format: In fact such figures mean nothing at all unless the figures are a) seen in the context of general death figures and b) corrected for those who would have died at similar times had Covid not been around. The only way…