Electric Vehicles Products
Leonics NK ER 4815 — 48V / 15A Battery Charger
High-Output 48V Charger for Industrial & Large-Scale Applications
The NK ER 4815 is a high-capacity, SMPS-based battery charger designed for 48V battery systems. With a robust 15A output current and a flexible charging voltage range (approximately 44–63 V DC), this charger can handle demanding industrial loads, backup power supplies, and large-scale off-grid setups. Boasting multi-stage charging, advanced protection features, and an efficiency of up to 85%, the NK ER 4815 guarantees optimized battery health and reliable long-term performance.
Key Specifications
Operating Input Voltage: 230 Vac
Range: 170–300 Vac (cold start support)
Maximum Input Current: 9 A
Frequency: 50 Hz (47–63 Hz)
Inrush Current: < 30 A
Charging Voltage: ~63 V (Adjustable 44–63 V range)
Charging Current: 15 A
Ripple & Noise: Max 750 mV
Output Power: 945 W (typical)
Stage 1 (Boost Mode): Constant current up to ~80% capacity
Stage 2 (Absorption): Constant voltage until battery reaches 100%
Stage 3 (Float): Maintains full charge
Stage 4 (Re-Charge): Periodic trickle to keep the battery in top condition
Power On: Red LED
< 50% Charging: 50% Green LED continuously blinking
> 50% Charging: 80% Green LED continuously blinking
> 80% Charging: 80% Green LED continuously ON
> 100% Charging: 100% Green LED continuously blinking
=100% Charging: 100% Green LED continuously ON
Fault: Power LED on / Charge indicator LEDs off
Input Over-/Under-Voltage: 300 Vac ±15 Vac / 170 Vac ±15 Vac
Output Over Voltage: 65 V (factory adjustable)
Output Overload: 15.5 A (fold back)
Short Circuit: Hiccup mode with auto-recovery
Battery Reverse Protection: Available
Operating Temperature: 0–50 °C
Storage Temperature: –20–70 °C
Operating Humidity: 5–95% RH (non-condensing)
Cooling: Fan cooling
Efficiency: ~85% at full load
Isolation: 1.5 kVac line & neutral to earth
Ground Leakage Current: 4 mA
Safety, EMI & EMC: Designed to meet CISPR22 / IEC61000
(Note: Actual charging voltage and currents can be set at the factory to suit specific battery requirements.)
General Product Advantages
Multi-Stage Charging: Boost, Absorption, Float, and (in some models) Re-Charge stages prevent battery damage, enhance performance, and prolong battery life.
Robust Protection: Comprehensive safety features safeguard against over-voltage, under-voltage, overload, short-circuit, and reverse polarity.
High Efficiency: Up to 80–85% efficiency at full load, reducing power losses.
User-Friendly LED Indicators: Real-time feedback on charging progress and fault conditions.
Wide Input Voltage Range: Supports stable operation even in areas with fluctuating grid supply.
Rugged Design: Durable enclosures and fan-cooling support usage in demanding industrial or outdoor environments.