Take a look at California. Their grid is routinely, daily, generating ~84% of its power from renewables [1] (with ~25GW of existing solar PV capacity, ~6GW of wind, and ~6GW of hydro). They are adding batteries rapidly [2] (with a goal of 52GW by 2045; they are 33% of the way there). They still have ~32GW of fossil gas generation capacity, but it is rarely used constantly at full capacity. They have plans for another ~21GW of solar PV on land that can no longer be farmed due to water shortages [3] [4] (enabling families to keep their land with long term lease payments).

Not everywhere is California, but solar and batteries are the cheapest form of generation in 90%+ of the world [5]. You simply keep building more solar collection, storage, transmission, etc. to orchestrate collecting this "fusion at a distance" and distributing it to loads. The sun rises every day, and will for our lifetimes. We continue to deploy batteries and solar at manufacturing capacity, while continuing to increase manufacturing capacity year over year. You fill any gaps with fossil generation until there are no longer any gaps to fill [6].

Tangentially, Australia is currently testing a battery with a 8 hour discharge capability [7] ("Long-Duration Energy Storage (LDES)"), as they are rapidly preparing for a network/team of battery storage facilities to assume grid health responsibility from their retiring thermal coal generators [8]. Certainly there is much work ahead in understanding and developing longer duration energy storage systems.

[1] https://app.electricitymaps.com/map/zone/US-CAL-CISO/live/fi...

[2] https://www.energy.ca.gov/data-reports/energy-almanac/califo...

[3] 21GW of Solar for California Land That Can No Longer Be Used for Agriculture - https://news.ycombinator.com/item?id=46488648 - January 2026

[4] https://valleycleaninfrastructureplan.com/

[5] Solar electricity every hour of every day is here and it changes everything - https://ember-energy.org/latest-insights/solar-electricity-e... - June 21st, 2025

[6] Renewables reached nearly 50% of global electricity capacity last year - https://news.ycombinator.com/item?id=47615756 - April 2026 (149 comments)

[7] https://www.yahoo.com/news/science/articles/australias-first...

[8] https://www.aemo.com.au/-/media/files/initiatives/engineerin...

(think in systems)