RV
Truck
Yacht
Cold Chain Vehicle
Road Rescue Emergency Vehicle
Lawn Mower
Ambulance
Wind Turbine
Compatibility with rated 44.8V/48V/51.2V LiFePO4 and other chemistries battery
Compact and lightweight design, no external regulator required
Up to 15kW high output, ideal for 48V HP Lithium Battery
Voltage and Current monitor & protection, Thermal monitor & derating, Load dump protection and etc.
Consume far less power from engine and generate far less heat, resulting in substantial fuel savings over the whole life cycle
Support both Continuously Adjustable Voltage Closed Loop Control and Current Limitation Closed Loop Control for safe battery charging system
Extreme low turn-on speed with charging capability of 1000rpm(>2kW) and 1500rpm(>3kW)
Software-defined Slew Rate of charging power ramp up & down
for smooth drivability, Software-defined Adaptive Idle of charging
power reduce for preventing engine stall
Simplified Plug and Play harness to easy installation and flexible CAN compatibility with RVC, CAN2.0B, J1939 and other protocols
Rigorous and strictest design, testing and manufacturing standard to ensure high quality
|
Model |
BLM4815 |
BLM4810A |
BLM4810M |
|
Operation Voltage |
24-60V |
24-60V |
24-60V |
|
Rated Voltage |
51.2V for 16s LFP, 44.8V for 14s LFP |
51.2V for 16s LFP, 44.8V for 14s LFP |
51.2V for 16s LFP |
|
Operating Temperature |
-40℃～105℃ |
-40℃～105℃ |
-40℃～105℃ |
|
Max Output |
300A@48V |
240A@48V |
240A@48V, Customer Specific 120A |
|
Rated Power |
8.9 KW @ 25℃,6000RPM 7.3 KW @ 55℃,6000RPM 5.3 KW @ 85℃,6000RPM |
8.0 KW @ 25℃,6000RPM 6.6 KW @ 55℃,6000RPM 4.9 KW @ 85℃,6000RPM |
6.9 KW@ 25℃,6000RPM Customer Specific 6.6 KW @ 55℃,6000RPM 4.9 KW @ 85℃,6000RPM |
|
Turn-on Speed |
500 RPM; |
500 RPM; |
500 RPM; |
|
Maximum Speed |
16000 RPM Continuous, |
16000 RPM Continuous, |
16000 RPM Continuous, |
|
CAN Communication Protocol |
Customer Specific; |
Customer Specific; |
RVC, BAUD 250kbps |
|
Operation Mode |
Continuously Adjustable Voltage |
Continuously Adjustable Voltage setpoint |
Continuously Adjustable Voltage setpoint |
|
Temperature Protection |
Yes |
Yes |
Yes |
|
Voltage Protection |
Yes with Loaddump Protection |
Yes with Loaddump Protection |
Yes with Loaddump Protection |
|
Weight |
9 KG |
7.7 KG |
7.3 KG |
|
Dimension |
164 L x 150 D mm |
156 L x 150 D mm |
156 L x 150 D mm |
|
Overal Efficiency |
max 85% |
max 85% |
max 85% |
|
Cooling |
Internal Dual Fans |
Internal Dual Fans |
Internal Dual Fans |
|
Rotation |
Clockwise/ Counter Clockwise |
Clockwise |
Clockwise |
|
Pulley |
Customer Specific |
50mm Overunning Alternator Pulley; |
50mm Overunning Alternator Pulley |
|
Mounting |
Pad Mount |
Mercedes SPRINTER-N62 OE bracket |
Mercedes SPRINTER-N62 OE bracket |
|
Case Construction |
Cast Aluminum Alloy |
Cast Aluminum Alloy |
Cast Aluminum Alloy |
|
Connector |
MOLEX 0.64 USCAR CONNECTOR SEALED |
MOLEX 0.64 USCAR CONNECTOR SEALED |
MOLEX 0.64 USCAR CONNECTOR SEALED |
|
Isolation Level |
H |
H |
H |
|
IP Level |
Motor: IP25, |
Motor: IP25, |
Motor: IP25, |
A DC charging alternator is an electromechanical device that converts mechanical energy into direct current (DC) electrical energy, commonly used to charge batteries or supply DC loads in mobile, industrial, marine, and off-grid applications. It differs from standard AC alternators in that it includes a built-in rectifier or controller to provide regulated DC output.
A DC alternator operates on the principle of electromagnetic induction:
The rotor (field coil or permanent magnet) spins inside a stator coil, generating AC electricity.
An internal rectifier converts the AC to DC.
A voltage regulator ensures a consistent output voltage, protecting batteries and electrical components.
Suitable for RVs, Trucks, Yachts, Cold Chain Vehicles, Road Rescue Emergency Vehicles, Lawn Mowers, Ambulances, Wind Turbines, etc.
Alternator: Produces AC power, often includes internal rectifiers to output DC. More efficient and compact.
DC Generator: Produces DC directly using a commutator. Generally less efficient and bulkier.
Modern vehicles and systems almost exclusively use alternators with DC output for charging batteries.
ROYPOW Intelligent DC Charging Alternator standard solutions offer rated 44.8V options for 14s LFP battery and 51.2V for 16s LFP battery and support max. 300A@48V output.
Consider the following:
System voltage (12V, 24V, etc.)
Required current output (Amps)
Duty cycle (continuous or intermittent use)
Operating environment (marine, high-temp, dusty, etc.)
Mounting type and size compatibility
A high-output alternator is designed to provide significantly more current than standard OEM units—often 200A to 400A or more—used in systems with high power demand, such as RVs, emergency vehicles, mobile workshops, and off-grid setups.
Rotor (field coil or magnets)
Stator (stationary winding)
Rectifier (AC to DC conversion)
Voltage regulator
Bearings and cooling system (fan or liquid-cooled)
Brushes and slip rings (in brushed designs)
Yes, DC alternators can be used in renewable energy systems, especially in hybrid and mobile setups. Instead of relying on fuel, the electric DC charging alternators can combine with solar panels, inverters, and battery banks to provide reliable energy support, aligning well with clean energy goals.
Air-cooled (internal fan or external ducting)
Liquid-cooled (for sealed, high-performance units)
Cooling is crucial in high-amp alternators to prevent thermal failure.
Check belt tension and wear
Inspect electrical connections and grounding
Monitor output voltage and current
Keep vents and cooling systems clean
Replace bearings or brushes if worn (for brushed units)
Battery not charging
Dimming lights or voltage fluctuations
Burning smell or noise from engine bay
Dashboard battery/charging warning light
High alternator temperature
Yes. ROYPOW UltraDrive Intelligent DC Charging Alternators are compatible with rated 44.8V/48V/51.2V LiFePO4 and other chemistries of batteries.
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