320 Ah Sodium-Ion Battery with 30-Year Lifespan — A Game Changer for Energy Storage

320 Ah Sodium-Ion Battery with 30-Year Lifespan

Chinese manufacturer Rept Battero has unveiled a new 320 Ah prismatic sodium-ion (Na-ion) cell designed for grid-scale long-duration energy storage (4+ hours), at SNEC 2026 in Shanghai.

This battery represents a major leap in energy storage technology, combining high capacity with exceptional cycle life, safety, and wide temperature tolerance.

Technical Specifications

• Capacity: 320 Ah — Wending prismatic cell
• Cycle Life: 20,000+ charge/discharge cycles
• Service Life: 25-30 years
• Round-Trip Efficiency: ≥97%
• Operating Temperature: -50°C to 60°C
• Low-Temp Performance: Retains over 87% capacity at -50°C
• Safety: Passed overcharge and nail penetration tests

Why Sodium-Ion?

Sodium-ion batteries offer several advantages over traditional lithium-ion:

1. Abundant raw materials: Sodium is widely available (common salt), unlike geographically limited lithium
2. Lower cost: Significantly cheaper raw materials reduce overall system cost
3. Safety: Lower risk of thermal runaway and fire compared to lithium-ion
4. Excellent cold performance: Maintains efficiency even in extreme conditions
5. Environmentally friendly: Materials are less harmful than lithium and cobalt

Target Applications

• Grid-Scale Storage: Storing surplus solar and wind energy
• Long-Duration Storage (4+ hours): Grid stability during peak hours
• Cold Climate Projects: Superior low-temperature performance
• Industrial Applications: Long operational life and high reliability

Commercial production and shipments are expected to begin in 2027, with initial deployment in renewable energy projects across northwest China and cold-climate regions.

Frequently Asked Questions

What is the difference between sodium-ion and lithium-ion batteries?

Sodium-ion batteries use sodium instead of lithium, making them cheaper, safer, and better performing in low temperatures, though energy density is slightly lower.

When will they be commercially available?

Commercial production is expected in 2027, with initial shipments for large-scale projects.

Are sodium-ion batteries suitable for Oman’s climate?

Yes — with an operating range of -50°C to 60°C, they are perfectly suited for Oman’s hot climate. Their 25-30 year lifespan makes them ideal for solar energy projects in Oman.

Conclusion

The new 320 Ah sodium-ion cell from Rept Battero marks a significant step toward affordable, reliable energy storage for renewable energy projects. As battery costs continue to decline and performance improves, the world moves closer to a fully renewable-powered grid.

AL-DHAW Sustainability Energy — Tracking the latest energy storage technologies worldwide