In a world shifting toward renewable power generation, the way we connect our power grids may matter more than ever. Using data from 155 regions on five continents, this study authored by EPIcenter affiliate Constance Crozier shows that linking neighboring grids via high‐voltage direct current (HVDC) lines can replace—or drastically reduce—the need for expensive batteries. When each region relies heavily on wind and solar, hundreds more cross‐border links become cost‐effective, sometimes saving up to 100 times more than in today’s fossil‐dominated systems. However, not every interconnection benefits both sides equally: larger markets and areas nearer the equator often reap the lion’s share of savings. As battery prices change and solar or wind gets cheaper, the “best” grid links evolve. In short: if we plan for the renewables era today, interconnecting power systems may be one of the smartest ways to keep lights on affordably tomorrow.
This summary was written with the assistance of Microsoft Copilot on July 8th, 2025. Its content was edited and verified by EPIcenter staff and affiliates.
Read the full paper: https://www.sciencedirect.com/science/article/abs/pii/S030626192201008X