Deploying renewable energy in mountainous regions presents distinct challenges: remote locations, limited grid capacity, and sparse population density complicate traditional centralized electricity systems. A new study examining 719 Swiss Alpine municipalities reveals that empowering local energy communities (LECs) to co-own both renewable generation assets and grid infrastructure can unlock substantially higher renewable deployment while improving economic and environmental outcomes.
The research modeled eight policy scenarios at high spatial and temporal resolution, varying grid ownership models, export penalties, and transformer capacity constraints. Results show that when LECs invest in renewable generation alongside grid reinforcement—forming true community microgrids—optimal renewable capacity increases by 50% relative to baseline policies. This expanded generation mix includes alpine solar, agrivoltaic systems, building-mounted PV, wind, and biomass, distributed across the region's most productive sites.
A critical finding concerns grid investment priorities: community ownership redirects grid reinforcement spending from urban centers toward remote Alpine valleys where solar resources are most abundant. This spatial reallocation ensures that renewable potential is neither constrained by inadequate local infrastructure nor lost to curtailment.
Storage deployment proves cost-effective primarily under higher imbalance penalties, yet grid co-investment consistently outperforms battery-centric approaches economically. Communities that own grid assets accumulate higher cumulative revenues and deliver greater consumer benefits, meaning public support for such frameworks generates net welfare gains rather than costs.
Emissions reductions are maximized under local grid ownership due to increased self-consumption of locally generated renewable electricity—customers use onsite and nearby renewables rather than exporting and reimporting power through inefficient central grids.
These findings have implications beyond Switzerland. As nations pursue net-zero targets, decarbonizing mountainous and rural regions often lags because centralized planning underinvests in remote areas. Enabling local communities to co-own and operate microgrids—supported by appropriate regulatory frameworks—offers a pathway to simultaneously accelerate decarbonization, improve local economics, and strengthen energy security in peripheral regions.
