Electric Vehicles Products
Leonics NK ER 2403 / NK ER 2405
Ideal for 24V Battery Systems
This series delivers reliable charging for 24V batteries, whether you’re powering home UPS systems, small electric vehicles, or other DC applications.
Key Specifications
Operating Input Voltage: 230 Vac (Range: 170–300 Vac)
Maximum Input Current: 2 A (NK ER 2403) / 3 A (NK ER 2405)
Operating Frequency: 50 Hz
Inrush Current: < 8 A
Charging Voltage: 29.4 V*
Charging Current: 3 A (NK ER 2403) / 5 A (NK ER 2405)
Ripple & Noise: Max 500 mV
Output Power: 90 W / 149 W
Stage 1 (Boost Mode): Constant current up to 80% battery capacity
Stage 2 (Absorption): Constant voltage until 100% capacity is achieved
Stage 3 (Float): Maintains charge level
Power On: Blue LED
Charging: Amber LED
Charging Complete: Green LED
Input Over-/Under-Voltage: 300 Vac ±15 Vac / 170 Vac ±15 Vac
Output Over-Voltage: 29.8 V
Output Overload: 3.5 A / 5.5 A (Fold-back or shutdown)
Output Short-Circuit, Battery Reverse Protection
Operating Temperature: 0–50 °C, Storage Temperature: –20 to 70 °C
Cooling: Fan cooling
Efficiency: ~80% at 100% load
Shorted Line & Neutral to Earth: 1.5 kVac, Ground Leakage Current: 4 mA
Safety, EMI & EMC: Designed to meet CISPR22 / IEC61000
24V UPS systems
DC power backup for smaller appliances
Light industrial and residential charging solutions
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.