MPP Solar LVX6048WP Parallel Installation Guide

LVX6048WP Parallel
Installation Guide

Introduction

This inverter can be used in parallel with maximum 6 units. The supported maximum output power is 36KW/36KVA.

Parallel cable

You will find the following items in the package:

Overview

1. Current sharing port
2. Parallel communication port

Mounting the Unit

When installing multiple units, please follow below chart.

NOTE: For proper air circulation to dissipate heat, it’s necessary to allow a clearance of approx. 20 cm to the side and approx. 50 cm above and below the unit. Be sure to install each unit in the same level.

Wiring Connection

The cable size of each inverter is shown as below:
Recommended battery cable and terminal size for each inverter:

WARNING: Be sure the length of all battery cables is the same. Otherwise, there will be voltage difference between inverter and battery to cause parallel inverters not working.
Recommended AC input and output cable size for each inverter:

You need to connect the cables of each inverter together. Take the battery cables for example. You need to use a connector or bus-bar as a joint to connect the battery cables together, and then connect to the battery terminal. The cable size used from joint to battery should be X times cable size in the tables above. “X” indicates the number of inverters connected in parallel. Regarding cable size of AC input and output, please also follow the same principle.
CAUTION!! Please install a breaker at the battery side. This will ensure the inverter can be securely disconnected during maintenance and fully protected from overcurrent of battery.

Recommended breaker specification of battery for each inverter:
One unit*
200A/60VDC

*If you want to use only one breaker at the battery side for the whole system, the rating of the breaker should be X times current of one unit. “X” indicates the number of inverters connected in parallel.

Recommended battery capacity

CAUTION! Please follow the battery charging current and voltage from battery spec to choose the suitable battery. The wrong charging parameters will reduce the battery lifecycle sharply.

Approximate back-up time table

Load (W)| Backup Time
@ 48Vdc 400Ah (min)| Backup Time
@ 48Vdc 600Ah (min)| Backup Time
@ 48Vdc 800Ah (min)| Backup Time
@ 48Vdc 1000Ah (min)| Backup Time
@ 48Vdc 1200Ah (min)
---|---|---|---|---|---
12000| 90| 140| 180| 240| 280
18000| 60| 90| 120| 160| 180
24000| 40| 70| 90| 120| 140
30000| 35| 55| 75| 90| 110
36000| 30| 50| 60| 80| 100

PV Connection
Please refer to user manual of single unit for PV Connection.
CAUTION: Each inverter should connect to PV modules separately.

Inverters Configuration

Two inverters in parallel:

Power Connection

Communication Connection

Three inverters in parallel:
Power Connection

Communication Connection

Four inverters in parallel:
Power Connection

Communication Connection

Five inverters in parallel:
Power Connection

Communication Connection

Six inverters in parallel:
Power Connection

Communication Connection

Setting and LCD Display Setting Program:

The parallel function setting is only available in Solar Power or Solar Power Pro software.
Please install software in your PC first.
For setting, you can set the inverter one by one through USB port.

• Use USB to synchronize the parameters:
  Parallel for output: Enable/Disable

Fault code display:

Commissioning

Step 1: Check the following requirements before commissioning:
• Make sure all wires correctly connected.
• Ensure all breakers in Line wires of load side are open and each Neutral wire of each unit is connected together.
Step 2: Turn on each unit and set “enable parallel for output” on Solar Power or Solar Power Pro. And then, shut down all units.
Step 3: Turn on each unit.

NOTE: Master and slave units are randomly defined. Warning 02 is AC GRID voltage low.
Step 4: Switch on all AC breakers of Line wires in AC input. It’s better to have all inverters connected to utility at the same time. If not, it will display fault 82 in the slave inverters. However, these inverters will automatically restart. If detecting AC connection, they will work normally.

Step 5: If there is no more fault alarm, the parallel system is completely installed.
Step 6: Please switch on all breakers of Line wires in load side. This system will start to provide power to the load.

Trouble shooting

2.Check if L1/L2/N cables are not connected with wrong sequence in all inverters.
3.Make sure the sharing cables are connected to all inverters.
4.If the problem remains, please contact your installer.
61| Relay board driver loss| 1.Disconnect all of power source.
2.Only connect AC input and press Enter key to let it working in bypass mode.
3.Check if the problem happens again or not and report the result to your installer.
62| Relay board communication loss
71| The firmware version of each inverter is not the same.| 1.Update all inverter firmware to the same version.
2.After updating, if the problem still remains, please contact your installer.
72| The output current of each inverter is different.| 1.Check if sharing cables are connected well and restart the inverter.
2.If the problem remains, please contact your installer.
80| CAN data loss| 1.Check if communication cables are connected well and restart the inverter.
2.If the problem remains, please contact your installer.
81| Host data loss
82| Synchronization data loss

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