The World's First Passively-Cooled Grid Scale Energy Storage System
Zero Moving Parts. No Limits.
Our Product
Reliability from Cell to System.
Purpose‑Built for the Grid. Designed to Run for Decades.
Purpose‑Built for the Grid. Designed to Run for Decades.
GS-1.1 is the first commercially available sodium‑ion battery energy storage system built for grid‑scale deployment. Powered by NFPP chemistry, it operates without active cooling– a global first at scale. Infrastructure‑ready, drop‑in compatible, and built for harsh environments from day one. Eliminating traditional Balance-of-System components removes over 85% of fire risks and addresses the rest with a safer sodium‑ion cell. This is not a tech demo.
It’s a commercial system ready to scale.
Specifications
Sodium-Ion (NFPP)
Sodium-Ion (NFPP)
Chemistry
Chemistry
3.5MWh
3.5MWh
Capacity
Capacity
Capacity
4+ hr
4+ hr
Duration
Duration
Duration
-40 to +55°C
-40 to +55°C
Operating Temperature
Operating Temperature
>95%
>95%
DC Round-trip efficiency
DC Round-trip efficiency
1. Purpose-built for utility-scale reliability.
From cell to system, GS-1.1 is built for longevity. No moving parts. No Fan. No chiller. No fluid systems. Passively cooled and real‑world tested, it runs without needing constant attention.
2. Performs Like an Asset. Deploys Like Product.
No scheduled maintenance. No thermal systems that fail. GS-1.1 operates for 20 years with minimal intervention, reducing on‑site complexity and maximizing uptime.
3. Ready for Today’s Grid. Not Just Tomorrow’s Vision.
GS-1.1 meets the utility needs of today: four‑hour dispatch, competitive energy density, and no thermal constraints. It’s ready for deployment now, not a decade from now.
4. Globally scaled. Commercially deployed.
Peak’s NFPP sodium‑ion cells are UL9540A‑tested, use abundant materials, and are manufactured with conventional electrode processes - scaled to gigawatt hours of yearly capacity.
5. Designed to eliminate risk, not manage it.
By removing active cooling, fans, pumps, and other moving parts, GS-1.1 eliminates over 85% of the root causes behind historical BESS failures. At its core is a chemistry suited for stationary storage, providing a fundamentally safer starting point. Together they deliver safer operation.
1. Purpose-built for utility-scale reliability.
From cell to system, GS-1.1 is built for longevity. No moving parts. No Fan. No chiller. No fluid systems. Passively cooled and real‑world tested, it runs without needing constant attention.
2. Performs Like an Asset. Deploys Like Product.
No scheduled maintenance. No thermal systems that fail. GS-1.1 operates for 20 years with minimal intervention, reducing on‑site complexity and maximizing uptime.
3. Ready for Today’s Grid. Not Just Tomorrow’s Vision.
GS-1.1 meets the utility needs of today: four‑hour dispatch, competitive energy density, and no thermal constraints. It’s ready for deployment now, not a decade from now.
4. Globally scaled. Commercially deployed.
Peak’s NFPP sodium‑ion cells are UL9540A‑tested, use abundant materials, and are manufactured with conventional electrode processes - scaled to gigawatt hours of yearly capacity.
5. Designed to eliminate risk, not manage it.
By removing active cooling, fans, pumps, and other moving parts, GS-1.1 eliminates over 85% of the root causes behind historical BESS failures. At its core is a chemistry suited for stationary storage, providing a fundamentally safer starting point. Together they deliver safer operation.
Lower OpEx. Higher uptime. Better LCOS.
GS-1.1 avoids auxiliary power consumption costs that eat into system revenue. No Chiller or HVAC load massively reduces operating costs. With fewer failure-prone systems, truck rolls are rare. Better degradation means lower overbuild. This is how you deliver grid-scale storage without adding grid-scale complexity.
*All values shown as 20-year Net Present Value (NPV) of operational costs.
*All values shown as 20-year Net Present Value (NPV) of operational costs.
GS-1.1 has the Lowest Operating Costs
No Auxiliary Power
No Auxiliary Power
Incumbent systems consume power to maintain operating conditions, our system doesn't.
No Preventative Maintenance
No Preventative Maintenance
Our product is designed around simplicity with durable and reliable components.
Superior Roundtrip-Efficiency
Superior Roundtrip-Efficiency
Best-in-class cell performance combined with our distributed control architecture brings industry leading RTE.
Longer lifetime
Longer lifetime
Our stable, proven cell chemistry enables augmentation-free projects.
Technology
The Building Blocks of Stable and Reliable Energy Storage
Technology
The Building Blocks of Stable and Reliable Energy Storage
Technology
The Building Blocks of Stable and Reliable Energy Storage
Our Technology
The Building Blocks
Our systems are built for the grid, not adapted to it.
Our systems are built for the grid, not adapted to it.
Most battery energy storage systems (BESS) today use EV batteries repackaged for grid use. These designs bring baggage: active cooling systems, fire suppression systems, and complex monitoring software. We started with what the grid operators, utilities, and developers actually need: long life, uptime, and simplicity. Our systems prioritize serviceability, uptime, and predictable long-term performance. By eliminating active thermal systems, GS1.1 removes cost, complexity, and risk from grid storage,
Stable Chemistry
Stable Chemistry
Sodium-Ion
LFP
NMC
Our chemistry is made for stationary storage, not borrowed from mobility.
Incumbent battery chemistries were built for vehicles — where energy density and weight dominate. Stationary storage has different priorities: stability, cost, and long-term safety. Our NFPP-based sodium-ion chemistry uses abundant materials like sodium, iron, and carbon, and avoids critical minerals entirely. It aligns with proven cell manufacturing methods and performs reliably across temperature ranges. It’s the right chemistry for infrastructure.
Built for stability. Proven to stay that way.
Our cells operate safely across a wide temperature range and maintain performance without conditioning or containment. It's stable — by design, not by mitigation.
Sodium-Ion
LFP
NMC
Our chemistry is made for stationary storage, not borrowed from mobility.
Incumbent battery chemistries were built for vehicles — where energy density and weight dominate. Stationary storage has different priorities: stability, cost, and long-term safety. Our NFPP-based sodium-ion chemistry uses abundant materials like sodium, iron, and carbon, and avoids critical minerals entirely. It aligns with proven cell manufacturing methods and performs reliably across temperature ranges. It’s the right chemistry for infrastructure.
Built for stability. Proven to stay that way.
Our cells operate safely across a wide temperature range and maintain performance without conditioning or containment. It's stable — by design, not by mitigation.
Sodium-Ion
LFP
NMC
Our chemistry is made for stationary storage, not borrowed from mobility.
Incumbent battery chemistries were built for vehicles — where energy density and weight dominate. Stationary storage has different priorities: stability, cost, and long-term safety. Our NFPP-based sodium-ion chemistry uses abundant materials like sodium, iron, and carbon, and avoids critical minerals entirely. It aligns with proven cell manufacturing methods and performs reliably across temperature ranges. It’s the right chemistry for infrastructure.
Built for stability. Proven to stay that way.
Our cells operate safely across a wide temperature range and maintain performance without conditioning or containment. It's stable — by design, not by mitigation.
Engineered Simplicity
Engineered Simplicity
Complexity is the real cost driver. We removed it.
In grid storage, cost doesn’t just come from the cell — it comes from components that make the system work, installation & construction, auxiliary loads, and long-term operations. Our architecture is modular, passive, and designed for field deployment without layers of custom integration. Peak’s system removes active cooling, reduces cabling, and simplifies installation. It is open-air, modular, and passive by design. Simplifying the system simplifies the economics.
Fewer parts. Fewer failures.
Most storage failures come from thermal, electrical, or other auxiliary subsystems — not the cells. We eliminate them wherever possible. No pumps, fans, chillers, or compressors. The system is simple because the chemistry allows it.
Complexity is the real cost driver. We removed it.
In grid storage, cost doesn’t just come from the cell — it comes from components that make the system work, installation & construction, auxiliary loads, and long-term operations. Our architecture is modular, passive, and designed for field deployment without layers of custom integration. Peak’s system removes active cooling, reduces cabling, and simplifies installation. It is open-air, modular, and passive by design. Simplifying the system simplifies the economics.
Fewer parts. Fewer failures.
Most storage failures come from thermal, electrical, or other auxiliary subsystems — not the cells. We eliminate them wherever possible. No pumps, fans, chillers, or compressors. The system is simple because the chemistry allows it.
Complexity is the real cost driver. We removed it.
In grid storage, cost doesn’t just come from the cell — it comes from components that make the system work, installation & construction, auxiliary loads, and long-term operations. Our architecture is modular, passive, and designed for field deployment without layers of custom integration. Peak’s system removes active cooling, reduces cabling, and simplifies installation. It is open-air, modular, and passive by design. Simplifying the system simplifies the economics.
Fewer parts. Fewer failures.
Most storage failures come from thermal, electrical, or other auxiliary subsystems — not the cells. We eliminate them wherever possible. No pumps, fans, chillers, or compressors. The system is simple because the chemistry allows it.
Just Energy Storage
Storage, Simplified.
Every component earns its keep.
In most battery systems, a large share of the hardware doesn’t actually store energy. It supports cooling, controls, or custom integration. We designed Peak’s system so that the majority of its cost and footprint go directly to energy-storing components. By minimizing ancillary hardware and maximizing cell content, we deliver higher usable capacity per dollar and per square foot. More of the system does the job you bought it for: storing energy.
No Chiller. No fire suppression. No aux power. No Noise.
Our chemistry is thermally stable under all operating conditions. This eliminates the need for active cooling, pressurized fluid loops, and fire suppression systems — reducing system complexity, installation cost, and operating load and eliminating noise generation.
Every component earns its keep.
In most battery systems, a large share of the hardware doesn’t actually store energy. It supports cooling, controls, or custom integration. We designed Peak’s system so that the majority of its cost and footprint go directly to energy-storing components. By minimizing ancillary hardware and maximizing cell content, we deliver higher usable capacity per dollar and per square foot. More of the system does the job you bought it for: storing energy.
No Chiller. No fire suppression. No aux power. No Noise.
Our chemistry is thermally stable under all operating conditions. This eliminates the need for active cooling, pressurized fluid loops, and fire suppression systems — reducing system complexity, installation cost, and operating load and eliminating noise generation.
Every component earns its keep.
In most battery systems, a large share of the hardware doesn’t actually store energy. It supports cooling, controls, or custom integration. We designed Peak’s system so that the majority of its cost and footprint go directly to energy-storing components. By minimizing ancillary hardware and maximizing cell content, we deliver higher usable capacity per dollar and per square foot. More of the system does the job you bought it for: storing energy.
No Chiller. No fire suppression. No aux power. No Noise.
Our chemistry is thermally stable under all operating conditions. This eliminates the need for active cooling, pressurized fluid loops, and fire suppression systems — reducing system complexity, installation cost, and operating load and eliminating noise generation.
Reliable Operation
Reliable Operation
Reliable Operation
Engineered for decades, not just cycles.
Our solution is designed with the focus on reliability. Minimal degradation, no augmentation, or preventative maintenance for 20+ years. By removing components that fail and using a chemistry that degrades slowly, we’ve built a system that operates quietly and reliably in the background. It’s infrastructure, not a science experiment.
Runs for 20 years. No surprises.
This streamlined design doesn’t just lower cost, it removes the primary sources of operational risk. Fewer moving parts means fewer points of failure, quieter operation, and a system that delivers consistent performance without constant intervention.
Engineered for decades, not just cycles.
Our solution is designed with the focus on reliability. Minimal degradation, no augmentation, or preventative maintenance for 20+ years. By removing components that fail and using a chemistry that degrades slowly, we’ve built a system that operates quietly and reliably in the background. It’s infrastructure, not a science experiment.
Runs for 20 years. No surprises.
This streamlined design doesn’t just lower cost, it removes the primary sources of operational risk. Fewer moving parts means fewer points of failure, quieter operation, and a system that delivers consistent performance without constant intervention.
Engineered for decades, not just cycles.
Our solution is designed with the focus on reliability. Minimal degradation, no augmentation, or preventative maintenance for 20+ years. By removing components that fail and using a chemistry that degrades slowly, we’ve built a system that operates quietly and reliably in the background. It’s infrastructure, not a science experiment.
Runs for 20 years. No surprises.
This streamlined design doesn’t just lower cost, it removes the primary sources of operational risk. Fewer moving parts means fewer points of failure, quieter operation, and a system that delivers consistent performance without constant intervention.
End-to-end Control
End-to-end Control
Full-stack control means faster, cheaper, safer.
By owning the entire stack — from cell chemistry to system design and manufacturing — we iterate faster, have aligned reliability targets, and lower risk during procurement. We're not integrating around external constraints — we’re solving the whole problem at once.
No critical materials. Fully domestic capable supply chain.
NFPP cells contain no lithium, cobalt, nickel, or graphite. All raw materials have high global availability and U.S. production potential. This allows for low-cost scale-up domestically.
Full-stack control means faster, cheaper, safer.
By owning the entire stack — from cell chemistry to system design and manufacturing — we iterate faster, have aligned reliability targets, and lower risk during procurement. We're not integrating around external constraints — we’re solving the whole problem at once.
No critical materials. Fully domestic capable supply chain.
NFPP cells contain no lithium, cobalt, nickel, or graphite. All raw materials have high global availability and U.S. production potential. This allows for low-cost scale-up domestically.