0-500V input voltage, 0-90A current, and 3600W autoranging power in a compact 3U 19" rack chassis. Built-in function generator with sine/triangle/arbitrary modes, battery test, MPPT tracking, internal resistance simulation, touchscreen HMI, analog & digital remote control, master-slave parallel up to 16 units, and full protections (OVP/OCP/OPP/OT). Ideal for battery discharging, solar panel MPPT characterization, power supply testing, and automotive electronics.

Output Current

0-90A

Output Power

3600W

Output Voltage

0-500V

Type

Characteristic Curve

U/I/P autoranging

External Control

Analogue 0-5V/0-10V, USB, LAN, Profibus, DeviceNet, RS232, CAN, Modbus

Housing

19" rack

Human Interface

Touch panel & Menu

Special Feature

Function Generator, Resistance

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Description

30-Second Fit Check

Input: 0-500V, 0-90A, 3600W with true autoranging (U/I/P).
AC supply: 90-264V AC via standard IEC socket, 45-65Hz.
Derating: Peak power 3600W, steady power 3600W at 21°C ambient.
Regulation: Load regulation CV ≤0.1% Umax, CC ≤0.2% Imax.
Ripple: Not specified – typical low noise for electronic load.
Protections: Adjustable OVP (0-103% Umax), OCP, OPP, plus OT, PF.
Built-in function generator, battery test, MPPT tracking, and resistance mode.

What It Is + Why It Matters

High-power programmable electronic load for battery discharge, power supply test, solar inverter MPPT tracking, and automotive electronics.
Autoranging input – delivers full 3600W across wide voltage/current range; no manual range switching.
Built-in function generator with sine, triangle, rectangular, trapezoid, arbitrary (99 points), ramp, DIN 40839, plus battery test and MPPT tracking (4 modes).
Internal resistance simulation (CR mode) for realistic battery loading.
Master-Slave parallel – up to 16 units for total power up to 57.6kW; true current sharing via Share bus and digital MS bus.
High dynamics: Current rise time < 22 μs (10-90%).

Note: Remote sensing compensates voltage drop at source terminals (max 5% of Umax). Always use DC terminal covers – hazardous voltage possible (500V).

Key Specs (EA-EL 9500-90 B 3U)

Voltage range: 0-500V (adjustable).
Current range: 0-90A (adjustable).
Power range: 3600W (peak and steady at 21°C).
Internal resistance range: 0.5Ω – 170.34Ω (approx., from spec table).
Min. input voltage for Imax: ≈6.5V.
Rise time (10-90% Inom): < 22 μs; Fall time < 29 μs.
Display accuracy: Voltage ≤0.1% Umax, Current ≤0.1% Imax.
Insulation: DC input to enclosure: DC minus ±400V max permanent, DC plus up to ±400V + input voltage.
Cooling: Temperature-controlled fans, front intake, rear exhaust.
Dimensions (WxHxD): 19" x 3U x 461mm (enclosure). Weight: ≈13 kg (28.7 lb).

Interfaces & Remote Control

Standard digital: USB (rear B) + front USB host for data logging/sequence loading; supports SCPI and ModBus RTU.
Built-in analog interface (15-pin D-Sub): 0-5V / 0-10V selectable range for set/readback of U/I/P/R; includes remote on/off, alarm outputs, and CV status.
Optional plug-in modules (IF-AB series): Profibus, ProfiNet, CAN, CANopen, RS232, ModBus TCP, EtherCAT – retrofittable.
GPIB optional (option 3W replaces module slot).
Remote sense for accurate voltage measurement at source terminals.

Best for / Not for

Best for: Battery discharge testing (Li-ion, lead-acid, etc.), solar panel MPPT characterization, DC power supply burn-in and regulation test, fuel cell loading, automotive component test (DIN 40839), and general-purpose electronic load applications up to 500V/90A.
Not for: Applications requiring energy recovery (use PSB series); series connection of multiple loads (not permitted); source operation (power supply only).

Selection Checklist + Integration

Confirm source voltage ≤500V DC and current ≤90A (peak 3600W).
DC cable cross-section: For 90A / 5m length, use at least 25mm² (AWG3); ring lug recommended (M6 bolt).
Mounting: 19" rack, 3U height, allow >30cm rear clearance for airflow.
For master-slave parallel: Connect Share bus (twisted pair) and MS bus (RJ45 CAT5); terminate ends via DIP switch. Up to 16 units.
For battery test: Use built-in static or dynamic discharge mode with adjustable discharge voltage, time, and capacity thresholds.
For MPPT tracking: Select mode MPP1 (find MPP), MPP2 (track), MPP3 (fast track), or MPP4 (user-defined curve via USB).
For remote sensing: Use supplied sense connector to compensate voltage drop; do not connect NC pins (500V+ models).
Firmware updates via USB-B and EA Power Control software (included).