Energy Storage Protection Solution

Application

Description

Comprehensive protection solution for utility-scale and commercial battery energy storage systems featuring Sinofuse 1500VDC fuses with time-delay characteristics for inverter coordination. Provides protection for battery racks, inverters, and DC distribution with breaking capacity up to 100kA.

Core Advantages

1500VDC Capability Supports modern utility-scale solar and storage systems operating at 1500VDC, reducing DC cabling costs and improving efficiency.

Inverter Coordination Time-delay characteristic allows inverter capacitor pre-charge while providing fast protection during actual fault conditions.

Massive Breaking Capacity 100kA breaking capacity handles severe faults from large lithium-ion battery arrays safely and reliably.

Breaker Backup Designed to coordinate with DC breakers, acting as ultimate protection for faults beyond breaker interrupting capability.

Recommended Bill of Materials (BOM)

Item	Part Number	Description	Quantity	Datasheet
1	ESS-1500-315A	Main Inverter Protection Fuse, 1500V, 315A	1	📄 Download
2	ESS-1500-250A	Battery Rack Protection Fuses, 1500V, 250A	8	📄 Download
3	Fuse Holder ESS-2	Fuse Holders for ESS Fuses	9	📄 Download

Applications

Utility-scale BESS installations

Commercial and industrial storage

Solar-plus-storage systems

Grid stabilization projects

Microgrids and islanding systems

Technical Specifications

Voltage Rating

1500V DC

Current Range

100A to 800A

Breaking Capacity

100kA @ 1500V DC

Operating Temperature

-40°C to +85°C

Time- Current

Time-delay (gR)

Mounting

Bolt-on M10

Standards

UL 248-13, IEC 60269-7

Customer Success Stories

Utility-Scale BESS Developer

Energy Storage | 100MWh Grid-Scale Battery Storage

Challenge

The developer needed 1500VDC protection for a large BESS project with multiple inverters and battery racks, requiring coordination with DC breakers and 100kA breaking capacity.

Solution

BeiLuo provided ESS-1500 series fuses with comprehensive coordination study. Our FAE team worked with their engineers to optimize protection settings and verify coordination.

Results

The protection system has operated reliably for 2+ years. The coordination study prevented several potential nuisance operations during inverter startup. The project achieved significant cost savings compared to international fuse suppliers.

FAE Expert Insights

Steven Wang

Senior FAE - Energy Storage Systems

10 years

Professional Insights

[Data Pending] FAE insights to be added based on actual application experience with this solution.

Key Takeaways

Use time-delay fuses for BESS to handle inverter inrush currents
1500V systems reduce DC cabling costs for utility-scale projects
Coordinate fuse with DC breaker - fuse as ultimate backup protection
Consider altitude derating for high-elevation installations
Size for 100% continuous duty - BESS operates continuously unlike EVs

Decision Framework

Steps:

Evaluate requirements
Compare solutions
Consult FAE

Ready to Implement This Solution?

Contact our FAE team for design support and quotes

Frequently Asked Questions

How do I size fuses for BESS inverter protection?

BESS inverter fuse sizing: 1) Determine inverter maximum DC input current at full power

2) Apply 1.25x to 1.5x safety factor for continuous operation

3) Consider inverter overload capability (typically 110% for 10 minutes)

4) Verify fuse time-current curve allows inverter startup inrush (typically 2-3x for 1-5 seconds)

5) Coordinate with DC breaker rating. Example: 250kW inverter at 1500V = 167A, select 250A fuse (1.5x). The time-delay characteristic should allow 300-400A for 5 seconds without opening.

Size at 1.25x to 1.5x inverter max current. Verify time-delay allows startup inrush.