EA-ELR 10750-06 2U Programmable Electronic DC Load (1500W, 0-750V, 0-6A)

The EA-ELR 10750-06 2U, developed by EA Elektro-Automatik and part of the ELR 10000 2U series, is a programmable electronic DC load with energy recovery. It’s designed for testing DC power supplies, batteries, and solar modules, featuring a 1500W rated power (derated to 1200W at 110-127V AC input), 0-750V adjustable DC voltage, 0-6A variable current, and 4Ω-6000Ω resistance range.

Its energy recovery function achieves up to 95% efficiency (at 100% power/input voltage), inverting consumed DC energy to feed back into the local grid, reducing energy waste. For cooling, it uses temperature-controlled forced air flow (front inlet, rear outlet) with auto-adjusted fan speed to balance heat dissipation and noise.

The load supports remote sensing (max. ≤5% nominal voltage compensation) for accurate voltage regulation, and operates in four modes: Constant Voltage (CV), Constant Current (CC), Constant Power (CP), and Constant Resistance (CR)—all with high precision (e.g., CV load regulation ≤0.05% FS, CC load regulation ≤0.1% FS).

It includes a built-in function generator for dynamic load testing (sine/triangular/rectangular waves, DIN 40839, battery test, MPP tracking, etc.). For remote control, it has galvanically isolated USB/Ethernet/analog interfaces, and supports SCPI/ModBus RTU protocols (automatic detection). Optional IF-AB modules (CANopen, ProfiNet, etc.) expand connectivity.

Scalability is enabled via parallel master-slave operation (up to 64 units, max. 192kW total power) using Master-Slave (RS485, RJ45) and Share (BNC) buses. Safety protections include OVP (0-110% nominal voltage), OCP (0-110% nominal current), OPP (0-110% nominal power), OT, and PF. It’s 2U 19" rack-mountable, operating at 0°C-50°C ambient temperature.

Key Features

• Core Specs: 1500W (1200W derated), 0-750V DC, 0-6A, 4Ω-6000Ω—for DC power supply/battery/solar testing.
• Energy Efficiency: Up to 95% energy recovery to grid, cutting operational costs.
• Wide AC Input: 110-127V/208-240V AC ±10% (1-phase), 45-65Hz, PF≈0.99.
• Temp-Controlled Cooling: Auto-adjust fan speed, front-to-rear air flow.
• Remote Sensing: Compensates cable voltage drops for precision.
• Parallel Operation: Up to 64 units via Master-Slave/Share buses (max. 192kW).
• Dynamic Testing: Built-in function generator (waves, battery test, MPP tracking).
• Isolated Interfaces: USB/Ethernet/analog; optional IF-AB modules for industrial buses.
• Dual Protocols: SCPI/ModBus RTU (auto-detect) for remote control.
• Safety Protections: OVP, OCP, OPP, OT, PF to safeguard equipment.