Do you have hot water storage? Time it to run down and recharge when you have excess. There are commercial products that do this semi-automatically. You can also get hot water taps that replace tea kettles that work on a similar principle.
If you have air-con or electric heating then run it to store heat and/or cool in a thermal mass.
Organise your day to run washing machines etc. at those times.
Phase change of water to ice can shift cooling loads if you have warm nights.
Plus electrify anything you have that currently burns fuel.
1) Get an EV if you don't already have one: 20 kWh is about the perfect excess capacity to convert.
2) Upgrade fossil-fueled appliances in your home to electric appliances, like to induction cooktops and heat pumps. (Do you have a gas range? They're so poor at heating efficiency and pollute your living space.)
There is likely no harm in keeping extra water around for the rule of 3's. [1]
[1] - https://www.trailhiking.com.au/safety/survival-rule-of-three...
May not be "exciting", but storing for future/dark use would be good :)
I have installed 3 servers (a "normal" tower PC + graphic card) running Boinc. A small timer powers on the PCs at 10, and powers them off at ~17h. Once up, they start folding and calculating for Folding@Home or WorldCommunityGrid.
I don't earn any money from it, but I like the fact that I'm contributing to science
If we insist on answering the question as-is: if you have a big area with large potential to generate electricity, just build the power resource and connect it to the grid, and bid on the local real-time & futures power market in your interconnection region. If the numbers don't look good for you, maybe you can mine crypto, but in reality you'll actually get a better return on your investment by investing in energy storage and playing the market with your generated energy to shift its use to peak times on the grid.
This isn't the answer that people are suggesting, because it's not glamorous.
Or, on a small scale, you could charge an electric car. :)
I don't think this will make long term sense as a result.
You really want places with sun, and wind, and good grid connections to industry with power needs to make the most of the opportunity and then you can make green hydrogen to export as well, but that also requires good transport connections.
That export opportunity currently depends on legislation though as current alternatives beat it on price if they're allowed to ignore their externalities.
Renting out remote controlled streaming geofenced battery charging model cars.
Autonomous radio telescope.
