A SERI report suggests coordinated deployment of solar and battery energy storage could cut Europe’s electricity costs by up to 40% by the 2030s, if DERs are harmonized with electrification and demand growth. The study highlights the importance of battery duration alignment and electrified demand to maximize savings, while warning against mismatches that could raise costs. Critics warn that electrification pledges must ensure clean power sourcing to avoid undermining climate goals.