ENERDRIVE
12V 40A+ DC2DC BATTERY CHARGER
12V 40A+ DC2DC BATTERY CHARGER
SKU:EN3DC40+
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Enerdrive | Dometic 12V 40A+ DC2DC Battery Charger
The Enerdrive | Dometic 40A+ DC2DC Battery Charger is a powerful, multi-input, fully automatic charger capable of delivering up to 50A of charging power. It intelligently charges your house battery from either your vehicle's alternator or from solar input using the built-in MPPT solar controller—switching seamlessly between the two without any external relays.
Perfect for off-grid and mobile power setups, this charger supports 12V or 24V vehicle inputs, and solar arrays up to 45V / 800W. It’s compatible with a wide range of battery types including Gel, AGM, Flooded, Lithium, and even fully custom programmable profiles.
Key Features
- Dual Input Charging – Alternator + MPPT Solar
- Up to 50A Output (Vehicle or Solar input dependent)
- 40A+ Charging at 40°C with Thermo-Controlled Fan Cooling
- Built-in MPPT Solar Regulator – up to 800W input
- Supports 12V or 24V Vehicle Systems
- Selectable Charging Profiles – Gel, AGM, Flooded, Lithium, Custom
- Multistage Smart Charging: Bulk, Absorption, Float
- DC Load Support Mode – Charger remains active to support onboard loads
- Smart Load Regulation – Prevents false charging due to active DC loads
- LCD Display & Battery Temp Sensor included
⚠️ Note: Vehicle input must be higher than output voltage to achieve full 50A charging.
Solar input is limited to 30A, but higher output is possible with higher voltage solar panels.
Multistage Charging Explained
- Bulk/Boost: Rapid charge at full output until absorption voltage is reached (~80% of battery capacity).
- Absorption: Voltage held steady while current tapers—completing the charge safely.
- Float: Voltage reduced to a safe level to maintain the battery and support loads without overcharging.
- Selectable 2-stage or 3-stage modes ensure flexibility for different battery chemistries.
Smart Charging & Load Management
The charger automatically regulates based on active loads, avoiding damage caused by prolonged bulk charging when loads are detected. This maximises battery life and improves efficiency across all battery types.
Solar Performance Example Table
| Panel Setup | Rated Power | Open Circuit Voltage (Voc) | Estimated DC Amps Output |
|---|---|---|---|
| 1x 150W @ 20Voc | 150W | 20V | 10A |
| 1x 200W @ 43Voc | 200W | 43V | 13A |
| 2x 150W @ 20Voc | 300W | 20V | 21A |
| 2x 200W @ 43Voc | 400W | 43V | 27A |
| 3x 150W @ 20Voc | 450W | 20V | 31A |
| 3x 200W @ 43Voc | 600W | 43V | 42A |
| 4x 150W @ 20Voc | 600W | 20V | 35A (Max 20Voc setup) |
| 4x 200W @ 43Voc | 800W | 43V | 47A (Max 43Voc setup) |
⚠️ Important Note: Solar output estimates are based on ideal conditions (sun angle, season, orientation). Real-world results may vary.
Technical Specifications
DC Output (CH1)
| Parameter | Value |
|---|---|
| Output Voltage (Nominal) | 12V (min 8.0V) |
| Output Current (Max) | 40A – 50A |
| Output Power | 775W |
| Battery Types Supported | Gel, AGM, Flooded, Lithium, Custom |
| Charger Voltage Range | 13.8V – 15.5V |
| Float Voltage Range | 13.0V – 13.8V |
| Charging Control | 2-stage / 3-stage (Default 3) |
| Equalize Voltage (Flooded) | 15.5V |
| Equalize Current | 10% of Bulk setting |
| DC Output Bank | Single |
| Standby Current Draw | < 50 mA |
| Efficiency | 95% |
| Battery Temp Settings | Low / Normal / High (Sensor Included) |
Input (CH2 – MPPT Solar)
| Parameter | Value |
|---|---|
| Voltage Range | 14.5 – 45V (VOC) |
| Max Input (≤23V panels) | 500W (600W allowable) |
| Max Input (37.5–45V panels) | 750W (800W allowable) |
Input (CH3 – Alternator)
| Parameter | Value |
|---|---|
| Input Voltage | 10.5 – 16VDC / 21 – 32VDC |
Physical Specifications
| Parameter | Value |
|---|---|
| Dimensions (H x W x D) | 242 x 172 x 74 mm |
| Weight (Unit) | 1.85 kg |
| Weight (Shipping) | 2.17 kg |
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