Powering Vessels Safely
Designed for the Future
Marine Energy Storage System
- Extreme Safety: Cell-level thermal runaway isolation.
- 10,000+ Cycles: Industry-leading lifespan.
- Plug-and-Play: cable connections only.
- Powerful and robust: up to 2.5C discharge
- Zero Liquid Cooling: Natural air-cooling simplicity.
Prevent
Mitigates file / explosion risks even in harsh conditions.
Long life cycle
Optimized for >10,000 cycles at 80% depth of discharge (DoD).
Ease of Integration
Modular design, cable connection only.
Eco-Conscious
Non-toxic LFP chemistry for sustainable lifecycle management.
Where to use
Passenger ships, cargo ships, offshores,and yachts
Engineered for
Marine Excellence
Safety-Centric Design
Cell-level thermal runaway containment.
IP67 protection (validated by saltwater
immersion tests).
Cylindrical cells structure
Chained cylindrical cells structure in module. Metal-covered cells: Even heat dissipation, low overheat risk
Light ventilation
Passive natural cooling. No pumps, No gas ducts or liquid cooling needed.
High C-rate sustain
Discharge: up to 3C, Charge: up to 1C
Cylindrical Cell Workforce
- Chemistry: Cylindrical LFP (LiFePO₄), 4.6Ah, 3.2V nominal.
- Safety: Individual CID fuse per cell.
- Robustness: Operates at -20°C to 68°C; minimal gas release during thermal events (2.29–6.9L/cell).
- Energy Density: 14.7Wh/cell—5% of prismatic cells, reducing propagation risk.
- Heat dissipation: 400% more surface area comparing with prismatic cell.
- Even heat dissipation: center of cell is only 13mm away from the casing
- True cell-level thermal runaway isolation Energy of a cell is not enough to open the CID of neighboring cells
- 300% discharge rate compared with prismatic cell as multi tap out cell structure
Modules
- Config: 16S24P (51.2V, 110.4Ah, 5.65kWh).
- Design: IP67-rated steel enclosure; natural cooling via cell spacing (400% more surface area vs. prismatic).
- Physical: 345 × 486 × 221 mm (W×D×H); 54.4kg.
- Performance: Max 110A charge (1C), Up to 330A discharge (3.0C).
BMS
- 3-Tier Architecture:
- BAU (Battery Array Unit): Central control.
- BMU (Battery Management Unit): Per-string monitoring.
- BSU (Battery Sub-Unit): Cell-level SoC/SoH tracking.
- Features: Multi-string support, fault isolation, remote diagnostics via Starlink/G60.
Certifications
- Safety Tests:
- Thermal Runaway: UL9540A-compliant (gas release <0.5L/Ah).
- Saltwater Immersion: IP67 validated (CNAS L5998).
- Flame Resistance: 1-hour external fire test (CNAS L6957).
- Features: Multi-string support, fault isolation, remote diagnostics via Starlink/G60.
Warranty
- 10+ Years:
- Covers defects and performance degradation (80% SoH at 10,000 cycles).
System Specifications
| Item | Specification |
|---|---|
| Rack Heights | 2219 mm (R18), 1760 mm (R14), 1311 mm (R10) |
| Rack Width & Depth | W840 mm, D500 mm |
| Cell Type | LFP 4.6Ah Cylindrical |
| Single module Energy / Nominal Voltage | 5.45 kWh / 51.2V |
| Single string Max. Voltage | 1000 V |
| Max. Gravimetric Density — String | 104 Wh/kg |
| Max. Volumetric Density — String | 102 Wh/litre |
| Max. Energy Density Footprint — String | 227 kWh/m² |
| Item | Specification |
|---|---|
| Discharge C‑rate (Peak 5 min / Continuous) | 3C / 2C |
| Charge C‑rate — Continuous | 1C |
| Cycle Life (80% DoD, 0.5C) | 10,500 |
ESS Module
Configuration
| ITEM | Specifications | Remarks |
|---|---|---|
| Configuration | 16S24P | |
| Nominal Voltage | 51.2V | |
| Nominal Capacity | 110.4 AH / 5,652 WH | |
| Min Capacity | 108 AH | |
| Max Charge Voltage | 56.8V | 3.55V for cell in case of unbalance |
| Discharge Cut-off Voltage | 48V | Leave some margin for long lifecycle |
| Max Continuous Charge Current | 110A (1C) | |
| Max Continuous Discharge Current | 220A (2C) | |
| Peak Discharge Current | Up to 330A (3C) | For 5 min# |
| Operating Temperature |
Charge: -10°C ~ 50°C Discharge: -20°C ~ 65°C |
Cell surface temperature |
| ESS module Size (W*D*H) | 345mm × 486mm × 221mm | |
| ESS module weight | 54.4kg | |
| IP level | IP67 |
ESS String
Configuration
| Model | Nominal Voltage | Nominal Capacity |
|---|---|---|
| MS001-04-01 | 204.8V | 110.4Ah / 22.67kWh |
| MS001-05-01 | 256.0V | 110.4Ah / 28.26kWh |
| MS001-06-01 | 307.2V | 110.4Ah / 33.91kWh |
| MS001-07-01 | 358.4V | 110.4Ah / 39.57kWh |
| MS001-08-01 | 409.6V | 110.4Ah / 45.22kWh |
| MS001-09-01 | 460.8V | 110.4Ah / 50.87kWh |
| MS001-10-01 | 512.0V | 110.4Ah / 56.52kWh |
| MS001-11-01 | 563.2V | 110.4Ah / 62.18kWh |
| MS001-12-01 | 614.4V | 110.4Ah / 67.83kWh |
| MS001-13-01 | 665.6V | 110.4Ah / 73.48kWh |
| MS001-14-01 | 716.8V | 110.4Ah / 79.13kWh |
| MS001-15-01 | 768.0V | 110.4Ah / 84.79kWh |
| MS001-16-01 | 819.2V | 110.4Ah / 90.44kWh |
| MS001-17-01 | 870.4V | 110.4Ah / 96.09kWh |
DNV Approved
Product Installation for Classified Vessels
This approval underscores our dedication to innovation, rigorous quality standards, and delivering reliable solutions for the maritime industry.
We are thrilled to announce that GNW Power Limited has received official DNV approval, confirming compliance with DNV rules for classification – Ships, offshore units, and high speed and light craft. This certification verifies that our products are accepted for installation on all vessels classed by DNV, in line with the relevant DNV guidelines and standards.
Engineered for Reliability:
Our Comprehensive Testing
Our batteries undergo stringent safety evaluations to deliver unmatched reliability and performance in every scenario.
Robust Saltwater Trial
- Survives 3-minute saltwater exposure.
- Safe discharge with heat/smoke.
- No damage after 7-day monitoring.
Intensive Flame Resistance Evaluation
- Damage limited to single cell.
- Neighboring cells continue functioning.
- Steel casing withstands over 1000°C
Heat Propagation Safety Test
- Overcharged cells activate CID successfully.
- No fire or explosion observed.
- Module maintains normal operating voltage.
Thermal Runaway Realiance Test
- CID triggers during controlled overheating.
- Produces only 6.9L gas volume. Less gas than competing brands.
Why Choose Greenwill?
- Proven Marine Expertise:
- Deemed in marine projects globally (UK, EUROPEAN, Asia,Autralia,).
- Global Suport:
- Remote monitoring and diagnostics via Starlink.
- Performance: Max 110A charge (1C), Up to 330A discharge (3.0C).
- 10.8GWh annual cell production with fully automated, eco-efficient lines.
Engineered for the Sea,Trusted by Innovators.
Contact Us:
Greenwill · Guangzhou, China
Email: info@greenwill.com Web: www.greenwill.com