1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your PowMr 2.4KW Hybrid Solar Inverter. This device integrates a pure sine wave inverter, a PWM solar charge controller, and a battery charger into one compact unit, offering uninterruptible power support. It is designed for off-grid solar systems and can be used with various home appliances and personal computers.
2. Safety Information
WARNING! Please read all instructions and warnings carefully before installation and operation. Failure to follow these instructions may result in electric shock, fire, or severe injury.
- Ensure all wiring is performed by qualified personnel.
- Do not disassemble the inverter. There are no user-serviceable parts inside.
- Keep the inverter away from water, high humidity, and flammable materials.
- Ensure proper ventilation around the inverter to prevent overheating.
- Always disconnect all power sources (solar, utility, battery) before performing any maintenance or wiring.
- Use only sealed lead-acid batteries or sealed GEL/AGM lead-acid batteries with this inverter.
3. Package Contents
Upon unpacking, please ensure all items are present and undamaged:
- PowMr Hybrid Solar Inverter Unit
- User Manual
- Communication Cable (USB)
- Software CD (or download link provided by seller)
Video: Unboxing and overview of the PowMr Hybrid Solar Inverter and its accessories.
4. Product Overview
4.1 Front Panel
The front panel features an LCD display, charging indicator, fault indicator, status indicator, and function buttons (ESC, UP, DOWN, ENTER) for configuration and monitoring.
4.2 Rear Panel
The rear panel provides all necessary connection terminals and switches:
Image: Rear panel connections. 1. AC Input, 2. AC Output, 3. Circuit Breaker, 4. Safety (Earth) ground, 5. Battery positive, 6. Battery negative, 7. PV Input, 8. ON/OFF switch, 9. RS232 communication port.
5. Setup
5.1 Mounting the Inverter
- Choose a suitable location that is dry, well-ventilated, and away from direct sunlight.
- Ensure the mounting surface can support the weight of the inverter.
- Allow sufficient clearance around the unit for proper airflow.
5.2 Wiring Connections
Refer to the diagrams and tables below for correct wiring procedures. Always ensure the inverter is OFF before making any connections.
Image: Off-Grid System Diagram illustrating connections between PV panel, utility, generator, external battery pack, inverter, and home appliances.
5.2.1 Battery Connection
Connect the battery bank to the inverter's battery terminals. Ensure correct polarity (positive to positive, negative to negative).
Image: Battery connection diagram for 12V and 24V systems. NOTE: Please only use sealed lead acid battery or sealed GEL/AGM lead-acid battery.
| Model | Typical Amperage | Battery Capacity | Wire Size | Ring Terminal Dimensions (mm) | Torque Value | ||
|---|---|---|---|---|---|---|---|
| Cable mm² | D | L | |||||
| 3KVA | 100A | 100AH | 1*4AWG | 22 | 6.4 | 33.2 | 2~3 Nm |
| 3KVA | 100A | 200AH | 2*8AWG | 14 | 6.4 | 29.20 | 2~3 Nm |
5.2.2 AC Input/Output Connection
Connect the AC input from your utility grid or generator and the AC output to your loads.
| Model | AC Breaker | Gauge | Torque Value | ||||
|---|---|---|---|---|---|---|---|
| 3KVA | 32A | 12 AWG | 1.2~1.6 Nm | ||||
5.2.3 PV Connection
Connect your solar PV panels to the inverter's PV input terminals. Ensure the PV array voltage and current are within the inverter's specifications.
Image: Off-Grid Hybrid Solar Inverter diagram showing solar panels, inverter, battery, and connected loads.
| Model | Typical Amperage | Gauge | Torque Value | ||||
|---|---|---|---|---|---|---|---|
| 3KVA | 50A | 8 AWG | 1.4~1.6 Nm | ||||
5.2.4 PV Module Selection
| Parameter | Value | Notes | |||||
|---|---|---|---|---|---|---|---|
| Maximum Power (Pmax) | 200W | Max PV Panel: 1200W (6 pcs x 200W Panel) | |||||
| Max. Power Voltage Vmpp(V) | 30.9V | 1 pc in Series / 6 pcs in Parallel (1 x 30.9V ≈ 30~32VDC) | |||||
| Max. Power Current Impp(A) | 8.42A | PV module numbers in parallel (6 x 8.42A < 50A) | |||||
| Open Circuit Voltage Voc(V) | 37.7V | Total PV module numbers | |||||
| Short Circuit Current Isc(A) | 8.89A | 1 x 6 = 6 | |||||
| Maximum PV module numbers in Series: 1 | |||||||
| PV module numbers in Parallel: 6 | |||||||
| Total PV module numbers: 1x6=6 | |||||||
5.3 Initial Power-Up
- After all connections are secure, turn on the battery breaker.
- Turn on the inverter's ON/OFF switch.
- Observe the LCD display for normal operation.
- If connected, turn on the AC input breaker (utility or generator).
6. Operating Modes
The inverter offers configurable charging and load output modes via the LCD settings to optimize performance based on your energy needs.
6.1 Charging Modes
You can configure the charging priority:
- Solar first: Prioritizes solar power for charging batteries.
- Utility first: Prioritizes utility power for charging batteries.
- Solar and Utility (default): Uses both solar and utility power for charging.
- Only Solar: Charges batteries exclusively from solar power.
6.2 Load Output Modes
You can configure the load output priority:
- Solar first
- Utility first (default)
- SBU priority
Image: Visual representation of the four charging output modes and three load output modes.
6.3 Configurable Settings via LCD
- Input Voltage Range: Adjustable for home appliances or personal computers.
- Battery Charging Current: Configurable based on application requirements.
- AC/Solar Charger Priority: Set preference for charging sources.
7. Maintenance
- Regular Cleaning: Keep the inverter's vents and surfaces clean and free from dust to ensure proper heat dissipation.
- Connection Check: Periodically inspect all wiring connections for tightness and corrosion.
- Battery Inspection: Check battery terminals for corrosion and ensure batteries are in good condition. Remember to use only sealed lead-acid or sealed GEL/AGM lead-acid batteries.
- Firmware Updates: If available, check the manufacturer's website for firmware updates to ensure optimal performance and new features.
8. Troubleshooting
The inverter is equipped with comprehensive protection features. If an issue occurs, the fault indicator may light up, and an error code might be displayed on the LCD.
- Overload Protection: If the connected load exceeds the inverter's capacity, it will shut down. Reduce the load and restart the inverter.
- Over Temperature Protection: If the inverter overheats, it will shut down. Ensure proper ventilation and allow it to cool before restarting.
- Short Circuit Protection: The inverter will protect itself from short circuits on the output. Identify and resolve the short circuit before restarting.
- Auto Restart: The inverter is designed to auto-restart when AC power recovers after an interruption.
- Cold Start Function: Allows the inverter to be powered on directly from batteries without AC input.
Image: Comprehensive protection features of the inverter.
9. Specifications
Below are the detailed specifications for the PowMr 2.4KW Hybrid Solar Inverter (Model PS-3K-110V).
Image: Inverter Charger product label with detailed specifications.
| Parameter | PS-3K-110V | PS-3K-220V |
|---|---|---|
| Input Voltage Waveform | Sinusoidal (utility or generator) | |
| Rated Power | 3000VA/2400W | |
| Input | ||
| Voltage | 110VAC | 230VAC |
| Frequency Range | 50HZ/60HZ (Auto Sensing) | |
| Output | ||
| AC Voltage Regulation | 110VAC | 230VAC |
| Surge Power | 6000VA | |
| Waveform | Pure Sine Wave | |
| Battery & AC Charger | ||
| Battery Voltage | 24VDC | |
| Float Voltage | 27VDC | |
| Overcharge Protection | 30VDC | |
| AC Charging Current | 20A/30A | |
| Solar Controller | ||
| Charging Current (PWM) | 50A | |
| Max PV Array Open Circuit Voltage | 80V | |
| Max PV Power Input | 1200W | |
| Standby Power Consumption | 2W | |
9.1 Additional Product Properties
- Brand Name: PowMr
- Model Number: PS-3K-110V
- Output Type: SINGLE
- Output Current: 50A
- Output Frequency: 50HZ/60HZ
- Weight: 8KG
- Is Smart Device: No
- Origin: Mainland China
- Certification: CE
- High-concerned chemical: None
- is_customized: Yes
Image: Comparison of internal components between MPS (MPPT controller) and PS (PWM controller) models. The PS model features a built-in PWM controller, while the MPS model has a built-in MPPT controller, distinguishable by an inductor in the MPPT version.
10. User Tips
- Software Access: The new package may not include a CD disc. If you require the monitoring software, please contact the seller for a download link.
- Battery Compatibility: Always double-check that you are using compatible sealed lead-acid or sealed GEL/AGM lead-acid batteries to ensure optimal performance and safety.
- Ventilation: Ensure the inverter is installed in a location with adequate airflow to prevent overheating, especially during peak operation.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please contact PowMr Direct Store or your authorized dealer. Keep your purchase receipt as proof of purchase for any warranty claims.