PowMr Solar Inverter Charger

3 Introduction

This is a multi-function inverter/charger, combining functions of inverter, solar charger and battery charger to offer uninterruptible power support with portable size. Its comprehensive LCD display offers user-configurable and easy-accessible button operation such as battery charging current, AC/solar charger priority, and acceptable input voltage based on different applications.

3.1 Features

• Pure sine wave inverter
• Configurable input voltage range for home appliances and personal computers via LCD setting
• Configurable battery charging current based on applications via LCD setting
• Configurable AC/Solar Charger priority via LCD setting
• Compatible to mains voltage or generator power
• Auto restart while AC is recovering
• Overload/ Over temperature/ short circuit protection
• Smart battery charger design for optimized battery performance
• Cold start function
• WIFI/GPRS (Option)
• Can connect to lithium battery

3.2 Basic System Architecture

The following illustration shows basic application for this inverter/charger. It also includes following devices to have a complete running system:

• Generator or Utility.
• PV modules

Consult with your system integrator for other possible system architectures depending on your requirements.

This inverter can power all kinds of appliances in home or office environment, including motor-type appliances such as tube light, fan, refrigerator and air conditioner.

Figure 1 Hybrid Power System: This diagram illustrates the system architecture. It shows solar panels connected to the inverter/charger unit. A generator or utility power source can also be connected. The inverter/charger is connected to external battery packs. Finally, home appliances are connected to the output of the inverter/charger. Arrows indicate power flow.

3.3 Product Overview

The operation and display panel, shown in below chart, is on the front panel of the inverter. It includes three indicators, four function keys and a LCD display, indicating the operating status and input/output power information.

Components:

• 1. LCD display: Shows operating status and information.
• 2. Status indicator: Indicates system status.
• 3. Charging indicator: Indicates charging status.
• 4. Fault indicator: Indicates fault conditions.
• 5. Function buttons: ESC, UP, DOWN, ENTER for navigation and selection.
• 6. Power on/off switch: Controls the unit's power.
• 7. AC input: Connection point for AC power source.
• 8. AC output: Connection point for AC load.
• 9. PV input: Connection point for solar PV modules.
• 10. Battery input: Connection point for battery packs.
• 11. RS-232 communication port: For data communication.

LED Indicators:

Function Keys:

4 Installation

4.1 Unpacking and Inspection

Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should have received the following items inside of package:

• The unit x 1
• User manual x 1

4.2 Preparation

Before connecting all wirings, please take off bottom cover by removing two screws.

4.3 Mounting the Unit

Consider the following points before selecting where to install:

• Do not mount the inverter on flammable construction materials.
• Mount on a solid surface.
• Install this inverter at eye level in order to allow the LCD display to be read at all times.
• For proper air circulation to dissipate heat, allow a clearance of approx. 20 cm to the side and approx. 50 cm above and below the unit.
• The ambient temperature should be between 0°C and 55°C to ensure optimal operation.
• The recommended installation position is to be adhered to the wall vertically.
• Be sure to keep other objects and surfaces as shown in the diagram to guarantee sufficient heat dissipation and to have enough space for removing wires.

Diagram: Shows recommended clearance around the inverter: 20cm on the sides, 50cm above and below.

⚠️ SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.

Install the unit by screwing two screws. It's recommended to use M4 or M5 screws.

4.4 Battery Connection

CAUTION: For safety operation and regulation compliance, it's requested to install a separate DC over-current protector or disconnect device between battery and inverter. It may not be requested to have a disconnect device in some applications, however, it's still requested to have over-current protection installed. Please refer to typical amperage in below table as required fuse or breaker size.

WARNING! All wiring must be performed by a qualified personnel.

WARNING! It's very important for system safety and efficient operation to use appropriate cable for battery connection. To reduce risk of injury, please use the proper recommended cable as below.

Recommended battery cable size:

Please follow below steps to implement battery connection:

1. Remove insulation sleeve 18 mm for positive and negative conductors.
2. Suggest to put bootlace ferrules on the end of positive and negative wires with a proper crimping tool.
3. Connect all battery packs as below chart.

Diagram: Shows battery connection for 2.0KVA/12V (one 12V battery) and 3.2KVA/24V (two 12V batteries in series).

5. Insert the battery wires flatly into battery connectors of inverter and make sure the bolts are tightened with torque of 2 Nm in clockwise direction. Make sure polarity at both the battery and the inverter/charge is correctly connected and conductors are tightly screwed into the battery terminals.

Recommended tool: #2 Pozi Screwdriver

⚠️ WARNING: Shock Hazard
Installation must be performed with care due to high battery voltage in series.

⚠️ CAUTION!! Before making the final DC connection or closing DC breaker/disconnector, be sure positive (+) must be connected to positive (+) and negative (-) must be connected to negative (-).

4.5 AC Input/Output Connection

CAUTION!! Before connecting to AC input power source, please install a separate AC breaker between inverter and AC input power source. This will ensure the inverter can be securely disconnected during maintenance and fully protected from over current of AC input. The recommended spec of AC breaker is 10A for 2.0kva and 32A for 3.2kva.

CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis-connect input and output connectors.

WARNING! All wiring must be performed by a qualified personnel.

WARNING! It's very important for system safety and efficient operation to use appropriate cable for AC input connection. To reduce risk of injury, please use the proper recommended cable size as below.

Suggested cable requirement for AC wires

Please follow below steps to implement AC input/output connection:

1. Before making AC input/output connection, be sure to open DC protector or disconnector first.
2. Remove insulation sleeve 10mm for six conductors. And shorten phase L and neutral conductor N 3 mm.
3. Insert AC input wires according to polarities indicated on terminal block and tighten the terminal screws. Be sure to connect PE protective conductor [Ground (yellow-green)] first.
4. Then, insert AC output wires according to polarities indicated on terminal block and tighten terminal screws.

Diagram: Shows AC terminal block connections for input/output, indicating PE, L, and N terminals.

⚠️ WARNING: Be sure that AC power source is disconnected before attempting to hardwire it to the unit.

4.6 PV Connection

CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker between inverter and PV modules.

WARNING! It's very important for system safety and efficient operation to use appropriate cable for PV module connection. To reduce risk of injury, please use the proper recommended cable size as below.

PV Module Selection:

When selecting proper PV modules, please be sure to consider below parameters:

1. Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
2. Open circuit Voltage (Voc) of PV modules should be higher than min. battery voltage.

Take 250Wp PV module as an example. After considering above two parameters, the recommended module configurations are listed as below table.

PV Module Wire Connection

Please follow below steps to implement PV module connection:

1. Remove insulation sleeve 10 mm for positive and negative conductors.
2. Suggest to put bootlace ferrules on the end of positive and negative wires with a proper crimping tool.
3. Check correct polarity of wire connection from PV modules and PV input connectors. Then, connect positive pole (+) of connection wire to positive pole (+) of PV input connector. Connect negative pole (-) of connection wire to negative pole (-) of PV input connector.

Recommended tool: 4mm blade screwdriver

4.7 Final Assembly

After connecting all wirings, please put bottom cover back by screwing four screws.

5 Operation

5.1 Power ON/OFF

Once the unit has been properly installed and the batteries are connected well, simply press On/Off switch (located on the button of the case) to turn on the unit.

Side view of unit: Shows the location of the power switch.

5.2 Operation and Display Panel

The operation and display panel, shown in below chart, is on the front panel of the inverter. It includes three indicators, four function keys and a LCD display, indicating the operating status and input/output power information.

LCD Display Elements:

• INPUTBATTTEMP: Input voltage, input frequency, PV voltage, charger current (if PV in charging for 2.0KVA models), charger power, battery voltage.
• OUTPUTBATTLOAD: Output voltage, output frequency, load percent, load in VA, load in Watt and discharging current.

LED Indicator Table:

Function Keys:

5.3 LCD Display Icons

5.4 LCD Setting

After pressing and holding ENTER button for 3 seconds, the unit will enter setting mode. Press “UP” or “DOWN” button to select setting programs. And then, press “ENTER” button to confirm the selection or ESC button to exit.

Setting Programs:

5.5 Display Setting

The LCD display information will be switched in turns by pressing “UP” or “DOWN” key. The selectable information is switched as below order: input voltage, input frequency, PV voltage, charging current, charging power, battery voltage, output voltage, output frequency, load percentage, load in Watt, load in VA, load in Watt, DC discharging current, main CPU Version.

5.6 Operating Mode Description

5.7 Battery Equalization Description

Equalization function is added into charge controller. It reverses the buildup of negative chemical effects like stratification, a condition where acid concentration is greater at the bottom of the battery than at the top. Equalization also helps to remove sulfate crystals that might have built up on the plates. If left unchecked, this condition, called sulfation, will reduce the overall capacity of the battery. Therefore, it's recommended to equalize battery periodically.

• How to Apply Equalization Function

You must enable battery equalization function in monitoring LCD setting program 30 first. Then, you may apply this function in device by either one of following methods:

1. Setting equalization interval in program 35.
2. Active equalization immediately in program 36.

• When to Equalize

In float stage, when the setting equalization interval (battery equalization cycle) is arrived, or equalization is active immediately, the controller will start to enter Equalize stage.

Diagram: Shows charging stages: Float Voltage, BULK, ABSORPTION, FLOAT, EQUALIZE.

• Equalize charging time and timeout

In Equalize stage, the controller will supply power to charge battery as much as possible until battery voltage raises to battery equalization voltage. Then, constant-voltage regulation is applied to maintain battery voltage at the battery equalization voltage. The battery will remain in the Equalize stage until setting battery equalized time is arrived.

Diagram: Shows Equalize Voltage, Absorption Voltage, Float Voltage, Equalize Charging Time.

However, in Equalize stage, when battery equalized time is expired and battery voltage doesn't rise to battery equalization voltage point, the charge controller will extend the battery equalized time until battery voltage achieves battery equalization voltage. If battery voltage is still lower than battery equalization voltage when battery equalized timeout setting is over, the charge controller will stop equalization and return to float stage.

Diagram: Shows Equalize Voltage, Absorption Voltage, Float Voltage, Equalize Charging Timeout.

5.8 Fault Reference Code

5.9 Warning Indicator

6 Clearance and Maintenance for Anti-Dust Kit (Optional)

6.1 Overview

Every inverter is already installed with anti-dusk kit from factory. Inverter will automatically detect this kit and activate internal thermal sensor to adjust internal temperature. This kit also keeps dusk from your inverter and increases product reliability in harsh environment.

6.2 Clearance and Maintenance(option)

Step 1: Please remove screws as below.

Diagram: Shows screw removal points on the unit.

Step 2: Then, dustproof case can be removed and take out air filter foam as shown in below chart.

Diagram: Shows removal of dustproof case and air filter foam.

Step 3: Clean air filter foam and dustproof case. After clearance, re-assemble the dust-kit back to the inverter.

NOTICE: The anti-dust kit should be cleaned from dust every one month.

7 Specifications

Table 1 Line Mode Specifications

Table 2 Inverter Mode Specifications

Table 3 Charge Mode Specifications

Utility Charging Mode

MPPT Solar Charging Mode

Table 4 General Specifications

8 Trouble Shooting