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From the linked paper. They mention some other options for storage like batteries (plenty of environmental issues there though) but based on the quoted text I have a hard time taking this seriously if they actually expect people to change their behavior.
Plug in car. Press the "I would like to only pay $100/yr to fuel this please" button.
Later when you leave for work press the "I would like the house to be cool when I get home and also want to pay half as much for AC" button.
Buy the 1.5m wide water heater that stores 10kWh of hot water and lasts a week between heatings rather than the 70cm one that lasts a day.
Such an unconscionable burden.
I think innovation at the consumption end is going to help a lot. On Technology Connections I saw an electric induction stove that could be powered from a regular socket. It had a battery that would trickle charge throughout the day and then use the batteries to power the induction cooktops, as well as a couple of plugs. If widely deployed and in other appliances, with a little smarts that could provide power leveling at the home level.
Another solution would be adding some intelligence to water heaters. Have a temperature control valve on the output where you set the temperature, and program the water heater get to 160-180°F when electricity is cheap. This would be a thermal battery that would easily level out demand for electricity for heating water.
Or you could do thermal storage by heating a house very warm/cold prior to a large cold snap/heat wave, and letting it coast down/up to a temperature instead of heating/cooling a lot during the cold/hot weather. He's got a video on this technique here
This has been done for close to a century in wind or run of river hydro heavy countries (as well as some coal ones).
The water heater has a buffer tank and is attached to a meter that only runs when a signal is sent across the power line. This stores about 20kWh for a 300L tank.
Modern insulation would allow going up to a few m^3 for a couple weeks' worth.
Combine that with some radiant floor heating on a nice thick concrete slab and you could use the battery for home heating. (Though it would need a lot of water.)
Here is an alternative Piped link(s): https://piped.video/watch?v=0f9GpMWdvWI
Piped is a privacy-respecting open-source alternative frontend to YouTube.
I'm open-source, check me out at GitHub.
"Not enough power from renewables? Just turn off your fridge for a few days and you'll be fine!"
Honestly that sentiment has strong "blame the consumer" vibes that seems to pervade climate arguments.
Sure, people can reduce consumption, but at best its a stopgap, not a solution.
There's stuff like heaters and to a degree things like washing machines that can shape the time they're active to whenever there's a lull.
Consider Britain: Each time the BBC runs a popular show you get an energy usage spike once it's over because people are getting up and make themselves a cuppa. Doesn't really make sense to run the heater in the tank for your shower at the same time, or charge your car, that can wait a bit.