Unigrid Launches Na+Casa Sodium-Ion Home Storage System, Initial European Deployment Underway

July 12, 2026

pv magazine Global USA

Overview

California-based Unigrid has unveiled its first residential sodium-ion energy storage system, “Na+Casa,” with initial installations completed in Europe and a U.S. rollout planned by year-end 2026. Leveraging a proprietary sodium chromium oxide (NaCrO₂) cathode, the 9.25 kWh wall-mounted system offers a 10,000-cycle lifespan, wide temperature tolerance, and enhanced safety compared to lithium-ion batteries. This move positions Unigrid to achieve 1 GWh of annual battery cell production capacity in 2026, marking a significant step towards scalable, safer home energy storage.

In Depth

Key Findings

Unigrid, a California-based sodium-ion battery developer, has announced the launch of its first residential energy storage system, “Na+Casa,” with initial deployments already completed in Europe. This marks a pivotal moment for sodium-ion technology, bringing a safer and more sustainable alternative to lithium-ion batteries into the home energy market.

Technical Details

The Na+Casa system is built around Unigrid’s proprietary sodium chromium oxide (NaCrO₂) cathode technology, which is central to its enhanced performance and safety profile. The system is a 9.25 kWh wall-mounted unit, designed to operate reliably across a wide range of temperatures. It boasts an impressive lifespan of 10,000 cycles, significantly outperforming many conventional residential lithium-ion storage solutions. Sodium-ion batteries are inherently safer than their lithium-ion counterparts, with a lower risk of thermal runaway and fire, making them particularly attractive for household applications. This inherent safety, combined with robust performance metrics, positions Na+Casa as a compelling option for homeowners seeking reliable energy independence.

Background & Context

The energy storage market is experiencing rapid growth, driven by the increasing adoption of renewable energy sources and a growing demand for residential self-consumption. However, this expansion is tempered by concerns over lithium supply constraints, price volatility, and safety issues associated with current lithium-ion technologies. Sodium-ion batteries offer a promising solution to these challenges, utilizing abundant and inexpensive sodium as their primary material. Unigrid’s introduction of Na+Casa represents a pioneering effort to commercialize sodium-ion technology for practical residential use, aiming to reduce supply chain dependencies and pave the way for a more resilient and sustainable energy infrastructure.

Strategic Significance & Outlook

Following its European debut, Unigrid plans to launch Na+Casa in the U.S. market by the end of 2026. The company aims to achieve an annual battery cell production capacity of 1 GWh in 2026, which will be crucial for scaling the availability of its Na+Casa systems. This ambitious production target is expected to accelerate the adoption of sodium-ion battery technology and reshape the competitive landscape of the residential energy storage market. The widespread availability of more affordable and safer storage solutions will enable households globally to further integrate renewable energy, contributing significantly to energy independence and a carbon-free future.

Source: https://www.pv-magazine.com/2026/07/08/unigrid-unveils-sodium-ion-residential-energy-storage-systems/

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