1. Introduction
This manual provides essential information for the safe and efficient operation of your PowMr 3200W Solar Inverter Charger. This device is a multi-functional inverter/charger, combining functions of an inverter, MPPT solar charger, and battery charger to offer uninterruptible power support in a portable size. Its comprehensive LCD display allows user-configurable and easy-accessible button operation such as battery charging current, AC/solar charger priority, and acceptable input voltage based on different applications.
Image 1: PowMr 3200W Solar Inverter Charger overview, highlighting 3200W power, 24V DC battery voltage, 108Vdc Max PV input, 60A MPPT charging current, and 110/120V AC output.
2. Safety Information
Please read all instructions and cautionary markings on the unit and in this manual before installation and operation. Failure to follow these instructions may result in electric shock, fire, or severe injury.
- Ensure proper grounding of the unit. Always connect the PE protective conductor ground first.
- Do not disassemble the unit. Refer servicing to qualified personnel.
- Keep the unit away from water, high humidity, and flammable liquids or gases.
- Ensure adequate ventilation around the inverter to prevent overheating.
- Use appropriate wiring gauges as specified in the installation section to prevent fire hazards.
- Verify battery voltage and polarity before connecting to the inverter.
3. Package Contents
Upon unpacking, please ensure the following items are included:
- PowMr 3200W Solar Inverter Charger Unit
- User Manual
- Communication Cable (USB/CAN/RS485, if applicable to your model)
- Optional: WiFi/GPRS data acquisition module (purchased separately)
4. Product Features
- Full digital voltage and current double closed loop control, advanced SPWM technology, output of pure sine wave.
- Two output modes: mains bypass and inverter output; uninterrupted power supply.
- Four charging modes: Only Solar, Mains Priority, Solar Priority, and Mains & Solar hybrid charging.
- Advanced MPPT technology with an efficiency of 99.9%.
- Designed with an LCD screen and 3 LED indicators for dynamic display of system data and operating status.
- ON/OFF rocker switch for AC output control.
- Power saving mode available to reduce no-load loss.
- Intelligent variable speed fan to efficiently dissipate heat and extend system life.
- Lithium battery activation by PV solar or mains, allowing access of lead-acid battery and lithium battery.
- 360° all-round protection with a number of protection functions.
- Complete protections, including short circuit protection, over voltage and under voltage protection, overload protection, reverse protection, etc.
Image 2: Detailed features of the 3.2KW 24Vdc to 110Vac Solar Inverter, including 60A MPPT Solar Charge Controller, 1600W Max Input Power, 30-108VDC PV operation voltage range, ≥30V first start voltage, and compatibility with LiFePO4, Sealed, GEL, Flooded, and AGM batteries.
Image 3: Diagram illustrating the multi-protection functions of the inverter, including Overload protection, Charge short protection, AC reverse protection, Short-circuit protection, Bypass over current protection, Battery over voltage protection, Battery low voltage protection, and Parallel connection error protection.
5. Specifications
| Category | Parameter | Value |
|---|---|---|
| Model | POW-LVM3.2K-24V | |
| AC Mode | ||
| Input | Rated input voltage | 110/120Vac |
| Input voltage range | (90Vac~140Vac) ±2% | |
| Frequency | 50Hz/ 60Hz (Auto detection) | |
| Overload/short-circuit protection | Circuit breaker | |
| Max. efficiency | >92% | |
| Maximum bypass overload current | 40A | |
| Inverter Mode | ||
| Output | Output voltage waveform | Pure sine wave |
| Rated output power (VA) | 3200 | |
| Rated output power (W) | 3200 | |
| Rated output voltage (Vac) | 120Vac | |
| Peak power | 6000VA | |
| Rated battery input voltage | 24V (Minimum starting voltage 22V) | |
| Efficiency | Power saving mode | Load ≤50W |
| AC Charging | ||
| Battery | Battery type | Lead acid or lithium battery |
| Max. charging current (can be set) | 0-40A | |
| Charge voltage range | 20 ~ 33Vdc | |
| Overcharge protection | Alarm and stop charging after 1 minute | |
| PV Charging | ||
| Solar Input | Max. PV open-circuit voltage | 108Vdc |
| PV operating voltage range | 30 ~ 108Vdc | |
| MPPT voltage range | 30 ~ 90Vdc | |
| Maximum input power | 1600W | |
| PV charging current range (can be set) | 0-60A | |
| Max. Hybrid Charging Current (AC charging + PV charging) | ||
| Charging | Max. charging current (can be set) | 0-100A |
| Certified Specifications | ||
| General | Certification | CE(IEC 62109-1)/CETL(UL 1741/ CSA C22.2 NO.107.1) |
| EMC certification level | EN61000, C2 | |
| Operating temperature range | -10°C to 55°C | |
| Storage temperature range | -25°C ~ 60°C | |
| Heat dissipation | Forced air cooling, variable speed of fan | |
| Communication interface | USB / CAN / RS485(WiFi/GPRS) / Dry contact | |
| Physical | Weight | 9kg |
| Dimensions (L x W x H) | Approx. | 45cm x 36cm x 18cm |
6. Setup and Installation
Proper installation is crucial for the safe and efficient operation of the inverter. Refer to the wiring diagram below for connections.
6.1 Wiring Diagram
Image 4: Comprehensive wiring diagram and technical specifications. This diagram illustrates connections for Generator/Utility AC Input, Solar Panels, 24V Battery, and AC Output to loads. Key specifications for each connection type are provided within the diagram.
6.2 Connection Guidelines
- Grounding: Always connect the PE protective conductor ground first.
- AC Input: Connect to a 90-140Vac source (Generator or Utility). Max AC Bypass Current: 40A. Max AC Charge Current: 40A. Recommended AC Wire: 10 AWG.
- Solar Panel Connection:
- Max PV Input Power: ≤ 1600W
- Max PV Input Current: ≤ 60A
- Start-up Voltage: Must be greater than 30V
- Total Open Circuit Voltage (VOC): 30-108V
- Recommended PV Wire: 8AWG
- Connect solar panels in series to achieve the required voltage within the 30-108Vdc range, ensuring the total power does not exceed 1600W.
- Battery Connection:
- Battery Type: 24V Lithium / Lead acid (compatible with LiFePO4, Sealed, GEL, Flooded, AGM).
- Recommended Battery Capacity: 200AH.
- Recommended Battery Wire: 2AWG.
- Max Charge Current: 100A.
- Ensure the battery is connected correctly before powering on the inverter.
- AC Output: Connect your 120Vac loads. AC Output Power ≤ 3200W. Rate Current: 25A. Max output current: 40A.
Image 5: Battery connection diagram showing various 24V battery types (GEL, FLD, LI, USE) and indicating 60A PV Max and 40A PV Max current limits.
7. Operating Modes
The inverter offers flexible operation with various charging and output modes:
7.1 Charging Modes
- Only Solar: Charges batteries exclusively from solar panels.
- Mains Priority: Prioritizes charging from the AC utility/generator, using solar only when AC is unavailable or insufficient.
- Solar Priority: Prioritizes charging from solar panels, using AC utility/generator only when solar power is insufficient.
- Mains & Solar Hybrid Charging: Utilizes both AC utility/generator and solar panels simultaneously for charging, optimizing charging speed.
7.2 Output Modes
- Mains Bypass: The inverter passes AC utility power directly to the loads.
- Inverter Output: The inverter converts DC battery power to AC for the loads. This mode is active when utility power is unavailable or when configured for battery priority.
7.3 Power Saving Mode
Activate the power saving mode to reduce no-load loss when the inverter is not actively supplying power to loads. This helps conserve battery energy.
7.4 Monitoring and Control
The inverter features an LCD screen and 3 LED indicators for real-time display of system data and operating status. For advanced monitoring and control, the SmartESS App can be used with an optional WiFi/GPRS data acquisition module.
Image 6: Screenshot showing the SmartESS App interface for monitoring and control, with icons for App Store and Google Play. Note: WiFi/GPRS data acquisition module is optional and needs to be purchased separately.
8. Maintenance
- Cleaning: Regularly clean the exterior of the inverter with a dry cloth. Ensure ventilation openings are free from dust and debris.
- Fan Maintenance: The intelligent variable speed fan helps dissipate heat. Ensure the fan is not obstructed and operates freely.
- Connections: Periodically check all electrical connections for tightness and corrosion.
- Battery Health: Monitor battery voltage and performance. Follow battery manufacturer guidelines for maintenance.
Image 7: Smart variable speed fan for efficient heat dissipation, showing internal components and airflow.
9. Troubleshooting
The inverter is equipped with 360° all-round protection functions to ensure safe operation. If an issue occurs, the LCD display and LED indicators will provide diagnostic information.
- Overload Protection: If the load connected exceeds the inverter's capacity (3200W rated, 6000VA peak), the inverter will shut down. Reduce the load and restart the unit.
- Short-Circuit Protection: In case of a short circuit on the output, the inverter will protect itself by shutting down. Identify and resolve the short circuit before restarting.
- Over/Under Voltage Protection: The inverter will protect itself and connected batteries from abnormal voltage levels (AC input, battery, or PV). Check voltage sources and battery health.
- Charge Short Protection: Protects against short circuits in the charging circuit.
- AC Reverse Protection: Prevents damage from incorrect AC input polarity.
- Bypass Over Current Protection: Protects the bypass circuit from excessive current.
- Battery Over/Low Voltage Protection: Ensures battery health by preventing overcharging or deep discharge.
- Parallel Connection Error Protection: If multiple inverters are used in parallel (if supported by model), this protection prevents errors in configuration.
For persistent issues, consult the detailed troubleshooting section in the full product manual or contact customer support.
10. User Tips
- Solar Panel Sizing: To ensure optimal performance, calculate the number of solar panels needed based on the inverter's maximum PV input power (1600W) and the PV operating voltage range (30-108Vdc). Ensure the total open circuit voltage of your solar array does not exceed 108Vdc and the total power does not exceed 1600W.
- Wiring Configuration: When connecting multiple solar panels, refer to the wiring diagram (Image 4) for guidance on series and parallel configurations to meet the required voltage and power specifications. For example, if using 100W 12V panels, you would need to wire them in series to reach the minimum 30V operating voltage and then potentially parallel strings to reach the desired power without exceeding 1600W or 108Vdc.
- Battery Compatibility: The inverter supports both lead-acid and lithium batteries. Ensure your battery type is correctly configured in the inverter settings for proper charging and discharge management.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your vendor or the manufacturer directly. Keep your purchase receipt as proof of purchase.
The PowMr 3200W Solar Inverter Charger is designed for various applications, including RV systems, trailers, boats, and solar home systems, providing reliable power wherever needed.
Image 8: Examples of applications for the solar inverter, including RV systems, trailers, boats, and solar home systems.
