SLB-125-400 SLB-Series DC Load Tester
Overview
The Eagle Eye Power Solutions SLB-125-400 SLB-Series DC Load Tester is purpose-built for demanding discharge testing of 125V stationary battery systems, delivering programmable constant-current loads up to 400 amps. Ideal for utility substations, telecom networks, industrial facilities, and data centers, it provides a reliable and defensible method for verifying true battery capacity—the definitive measure of system readiness.
Equipped with integrated safety protections, automatic shutdown safeguards, and optional per-cell voltage monitoring via DAC packages, the SLB-125-400 strengthens both technician protection and overall system reliability. Wireless communication capability and seamless integration with DataView software enable real-time test visibility, comprehensive data capture, and export-ready reporting.
When higher discharge capacity is required, the Eagle Eye Power Solutions SLB-125-400 can be paralleled with additional SLB-Series units to scale total current. It also supports assistant discharge mode, allowing it to operate alongside existing non-SLB load banks—providing a practical path to modernize testing programs without replacing legacy equipment.
Features
- 125V System Testing: Designed specifically for 125V DC battery strings.
- Up to 400A Programmable Discharge: Constant-current load testing for accurate capacity verification.
- Automatic Discharge Shutdown: Configurable protection based on time duration, total string voltage, capacity, or individual cell voltage.
- Wireless Remote Monitoring (466 MHz): Safely monitor live discharge tests remotely.
- DataView Software Included: Live monitoring, data logging, and exportable reports to Microsoft Excel.
- Parallel Capability: Connect additional SLB-Series units to increase total discharge current.
- Assistant Discharge Mode: Compatible with existing non-SLB load banks.
- Built-In Circuit Breakers: Overload protection and emergency shutdown capability.
- Optional DAC Package: Real-time per-cell voltage monitoring for 1.2V, 2V, 6V, and 12V cells (custom options available).
- Backlit LCD Display: Clear on-site visibility of test parameters and system status.
Specifications
| Nominal System Voltage: | 125 VDC |
| Discharge Current Range: | 12 – 400A (Single Unit) / Up to 1200A (Parallel with Additional SLB Units) |
| Discharge Voltage Range: | 10 – 576V (Max System Capable) |
| Voltage Steps: | 12V, 24V, 36V, 48V, 80V, 125V, 240V, 380V, 480V |
| Cell Voltage Monitoring (Optional DAC): | Standard: 1.2V, 2V, 6V, 12V / Optional: 3.6V, 4V, Custom Configurations Available |
| Accuracy: | Discharge Current: ±1% / Voltage: 0.5% – 0.8% |
| Resolution: | Current: 0.1A or 0.5% / Voltage: 0.001V |
| Sampling Interval: | 5 Seconds – 1 Minute |
| Data Transfer: | USB, Wireless (466 MHz) |
| Display: | Backlit LCD |
| Operating Environment: | 0 – 40 °C (32 – 104 °F) |
| Power Requirements: | 110/220 VAC 50/60 Hz or DC (From Connected Battery) |
| Dimensions: | Varies by Enclosure Size (Small through XX-Large) |
| Weight: | Varies by Enclosure Size (24 – 122 lbs) |
Resources & Support
Product Literature
Support Documents
Downloads
Video Resources
FAQs
Why is discharge testing necessary?
Discharge testing is the only verifiable method to confirm true battery capacity and ensure the system can support required loads during an outage.
Is the SLB-125-400 suitable for NERC compliance testing?
Yes. The programmable constant-current discharge and DataView reporting capabilities support documentation requirements for NERC-related maintenance programs.
Can I increase discharge current beyond 400A?
Yes. The SLB-125-400 can be paralleled with another SLB-Series unit to increase total discharge current capacity.
Does this unit support individual cell monitoring?
Yes. With the optional DAC package, real-time monitoring of individual cell voltages is available for multiple cell configurations.
Can the SLB-125-400 work with my existing load bank?
Yes. The Assistant Discharge feature allows it to operate alongside existing non-SLB load banks, adding monitoring capability and increasing current capacity.
What industries commonly use this model?
The SLB-125-400 is commonly used in utility substations, telecom facilities, data centers, and industrial DC power applications.