This is backwards. Fossil fuel consumption is increased when heat pumps are used, because fossil generation is typically the marginal source of electricity. Let's say you *don't* run to your heat pump. Solar/wind is still dispatched, but some unit of gas/coal gen isn't.https://twitter.com/bobwyman/status/1088317806360317953 …
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Replying to @RichardMeyerDC
Annual grid emissions depend on total, not marginal consumption. As the generation mix tends toward clean resources, average emissions are reduced since some heat pumps get non-marginal power. Marginal analysis is only relevant when assuming steady-state conditions. Not reality
9:55 AM - 24 Jan 2019
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