Global Energy Storage Estimator

Global energy storage estimator

100% clean grid — nuclear baseload + solar + wind + battery storage

Global demand assumptions
Total electrified demand (TWh/yr) 50,000
Nuclear baseload share (%) 40%
Solar share of renewables (%) 40%
Annual load growth rate (%/yr) 2.5%
Projection horizon (years) 25 yrs
Storage duration assumptions
Daily cycling buffer (hours) 8 h
Weather/multi-day buffer (days) 3 days
Seasonal long-duration buffer (weeks) 2 wks
Variability factor (% of renewable gen) 50%
Storage breakdown (today)

Daily cycling

—

TWh

Weather buffer

—

TWh

Seasonal

—

TWh

Total storage needed

—

TWh capacity

Breakdown by storage type
Regional variability multipliers
Storage requirement over time

Demand at horizon

—

TWh/yr

Storage at horizon

—

TWh

Growth multiplier

—

× today

Storage (TWh) Demand (TWh/yr)
Projection horizon (applies to all countries)
Projection horizon (years) 25 yrs

Storage duration buffers (daily/weather/seasonal) are shared from the Global tab. Each country uses its own demand, nuclear share, climate profile, and growth rate.

Storage breakdown by country
Country comparison — today (solid) vs horizon (faded)
Daily cycling Weather buffer Seasonal Faded bars = projected at horizon
Total storage needed today

— Anurag Kamal
San Jose, California · April 2026
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