Powmr Off-Grid 5KW 48Vdc PV 450Vdc 18A 230Vac Hybrid Inverter Charger Compatibility Lithium Battery Support Parallel And 3-Phase

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Powmr 5KW 48Vdc PV 450Vdc 18A 230Vac Hybrid Inverter Charger Compatibility Lithium Battery Support Parallel And 3-Phase

INTRODUCTION

This off-grid PV inverter can provide power to connected loads by utilizing PV power, utility power and battery power.

Depending on different power situations, this inverter is designed to generate continuous power from PV solar modules (solar panels), battery, and the utility. When MPP input voltage of PV modules is within acceptable range (see specification for the details), this inverter is able to generate power to feed the grid (utility) and charge battery. Galvanic isolation designed between PV/DC and AC output, so that user could connect any type of PV array to this inverter. See Figure 1 for a simple diagram of a typical solar system with this inverter.

Product Overview

NOTE: For parallel model installation and operation, please check separate parallel installation guide for the details

  1. LCD display
  2. Status indicator
  3. Charging indicator
  4. Fault indicator
  5. Function buttons
  6. Power on/off switch
  7. AC input connectors
  8. AC output connectors (Load connection)
  9. PV connectors
  10. Battery connectors
  11. Circuit breaker
  12. Current sharing port
  13. Parallel communication port
  14. Dry contact
  15. USB port: for communication port and USB function port
  16. LED indicators for USB function setting / Charger source priority setting
  17. BMS communication port: CAN, RS-485 or RS-232
  18. RS-232 communication port

INSTALLATION

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:


Preparation


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

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.
  • 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 right diagram to guarantee sufficient heat dissipation and to have enough space for removing wires.

Install the unit by screwing three screws. It’s recommended to use M4 or M5 screws.

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 required to have a disconnect device in some applications, however, it’s still required 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 and terminal size as below.

Recommended battery cable and terminal size:

Please follow below steps to implement battery connection:


  1. Assemble battery ring terminal based on recommended battery cable and terminal size.
  2. Insert the ring terminal of battery cable flatly into battery connector of inverter and make sure the nuts are tightened with torque of 2-3 Nm. Make sure polarity at both the battery and the inverter/charge is correctly connected and ring terminals are tightly screwed to the battery terminals.

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.

CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. ENSURE that utility AC input is connected to IN and load AC to OUT and not the wrong way round and also that Line and Neutrals are connected correctly.

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.

4. Then, insert AC output wires according to polarities indicated on terminal block and tighten terminal screws.

5. Make sure the wires are securely connected.

PV Connection

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

CAUTION: Please install a surge protection device between inverter and PV modules and the recommended voltage is 500V.

WARNING! Do switch off the inverter before connecting to PV modules. Otherwise, it will cause inverter damage.

WARNING! Do NOT connect negative and positive terminal of PV modules to the ground.

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 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.

Please follow below steps to implement PV module connection:


  1. Remove insulation sleeve 10 mm for positive and negative conductors.
  2. Check correct polarity of connection cable from PV modules and PV input connectors. Then, connect positive pole (+) of connection cable to positive pole (+) of PV input connector. Connect negative pole (-) of connection cable to negative pole (-) of PV input connector.

Recommended PV module Configuration

Final Assembly

After connecting all wirings, please put bottom cover back by screwing two screws as shown below.

Appendix I: Parallel function


Introduction

1. This inverter can be used in parallel with two different operation modes.

  1. Parallel operation in single phase with up to 9 units. The supported maximum output power is 45KW/45KVA.
  2. Maximum nine units work together to support three-phase equipment. Seven units support one phase maximum. The supported maximum output power is 45KW/45KVA and one phase can be up to 35KW/35KVA.

NOTE: If this unit is bundled with share current cable and parallel cable, this inverter is default supported parallel operation. You may skip section 3. If not, please purchase parallel kit and install this unit by following instruction from professional technical personnel in local dealer.

WARNING! Please make sure all output N wires of each inverter must be always connected. Otherwise, it will cause inverter fault in error code # 72.

2. Package Contents

In parallel kit, you will find the following items in the package:


3. Parallel board installation

Step 1: Remove wire cover by unscrewing all screws.

Step 2: Remove two screws as below chart and remove 2-pin and 14-pin cables. Take out the board under the communication board.


Step 3: Remove two screws as below chart to take out cover of parallel communication.

Step 4: Install new parallel board with 2 screws tightly.




Step 6: Connect 2-pin to original position.

Step 7: Put communication board back to the unit.

Line Mode Specifications

Inverter Mode Specifications

Charge Mode Specifications

General Specifications



Correct Connecting Order : Battery - solar panel - load

Disconnect : solar panel - battery - load



User Manual (Powmr-III-5K.pdf, 5,996 Kb) [Download]