The Consequences of Variable Renewable Energy: Storage and Integration

By Arvind Ananthanarayanan • Aniket Dharamshi • Vishrut Bubna

Cheap Electrons Come With Expensive Wires

Solar and wind are winning on cost. What gets less attention is what happens next: getting that power where it is needed, and keeping it available when the sun sets or the wind drops.

Our latest VQ Deep Dive, The Consequences of Variable Renewable Energy: Storage and Integration, argues that grids and storage, not generation, are where the next phase of the energy transition will be won or lost.

Renewables do not offer the frequency stability, voltage support and inertia that conventional plants provided for free. Grids must now actively manage this, and it is expensive: global grid investment is set to rise from USD 400bn a year today to over USD 600bn by 2050. Rising grid costs are expected to offset nearly half the savings from falling renewable prices.

Storage is the other half of the equation. Battery storage capacity is set to grow 25-fold by 2060, with lithium-ion overtaking pumped hydro as the dominant technology by the mid-2030s. Two to four hour battery systems are already commercially competitive.

For investors, the capital goods enabling grids and storage face sustained, policy-backed demand, with large but predictable capex cycles. In India, the transition cannot be assessed at the generation level alone; the health of state DISCOMs and transmission adequacy will decide whether renewable targets translate into viable returns. More on this in the final article of the series.

This is the second article in a three-part VQ Deep Dive series.

Read the full report here.