WATTSONIC 4to20kw 3P Series High Voltage ESS Installation Guide

October 30, 2023
wattsonic

WATTSONIC 4to20kw 3P Series High Voltage ESS

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Product Information: Wattsonic 4~20kw-3P Series

The Wattsonic 4~20kw-3P Series is an all-in-one system that comes with an inverter, wall-mounting bracket, expansion plug set, on-grid connector set, back-up connector set, PV terminal, battery terminal, meter with 3 CTs, monitoring device, communication cables, user manual, sub-master BMS for 3.84KWH, grounding wire, and stackable Li-HV LFP battery modules.

Part 1: Installation
Before installation, check the packing list. Install the base and kit for wall mounted as per the electrical wiring diagram. Ensure that the installation location and space and angle requirements are met.

Part 2: Electrical Connection
Install the battery module and sub-master BMS. Connect the AC cable, PV cable, and battery power cable as per the cable requirements. Install the inverter and connect it to the monitoring device using the communication cables provided. Connect the meter and CTs as per the meter terminals definition. Finally, connect the communication cables to the multifunction relay and terminate the CAN and RS485 communication lines.

Cable Requirements:

  • AC Cable: Outside diameter – 13.0-18.0 mm, Conductor core section – 5.0-8.0 mm
  • PV Cable: Outside diameter – 5.9-8.8 mm
  • Battery Power Cable: Outside diameter – 5.0-8.0 mm

Meter Terminals Definition:

No. Definition Function
1-6 L1-S1, L1-S2, L2-S1, L2-S2, L3-S1, L3-S2 To detect the CT current
7-10 L1, L2, L3, N Connect to grid to detect power grid voltage
12 L Power supplied from grid
13 RS485 Communicate with inverter

Note: The direction of the arrow inside the CT should be consistent with the direction of the arrow outside the CT.

Installation

Check Packing List

WATTSONIC-4to20kw-3P-Series-High-Voltage-ESS-1 WATTSONIC-4to20kw-3P-Series-High-Voltage-ESS-2

Installation Location

Installation Space and Angle

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Install the base

Install the battery module & Sub-Master BMS

Install the inverter

Install the kit for wall mounted & cables cover

Electrical Connection

Check Packing List

Cable types
AC cable| Cable requirements
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Outside diameter
13.0-18.0 mm| Conductor core section
2.5-10.0 mm²
PV cable| 5.9-8.8 mm| 2.5-4.0 mm²
Battery power cable| 5.0-8.0 mm| 10 mm²

  • AC cable: On-grid side uses a five-core cable (L1, L2, L3, N, and PE). Back-up side uses a four-core cable (L1, L2, L3, N).
  • AC Connector: Please distinguish the on-grid and back-up connector, On-grid connector is red and Back-up connector is Black.
  • Battery power cable: If the conductor core of the battery cable is too small, which may cause poor contact between the terminal and the cable, please use the cable specified in the above table, or contact Wattsonic to purchase terminals of other specifications.

Electrical wiring diagram

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AC Connection

Monitoring Device Installation

Meter and CT connection

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Meter terminals definition

No. Definition Fun ction
1 L1-S1 To detect the CT current
2 L1-S2
3 L2-S1
4 L2-S2
5 L3-S1
6 L3-S2
7 L1 L1/L2/L3/N connect to grid to detect power grid voltage
8 L2
9 L3
10 N
12 L Power supplied from grid
13 N
RS485 RS485 Communicate with inverter

Communication Connection

WATTSONIC-4to20kw-3P-Series-High-Voltage-ESS-15

WATTSONIC-4to20kw-3P-Series-High-Voltage-ESS-16

Pin Definition Function
RJ45-1 RS 485 Communicate with Meter
RJ45-2 CAN Communicate with BMS
1 COM Multifunction Relay
2 NO (Normally Open)
3-4 / Reserved
5 DRM4/8 DRED For Australia and New Zealand
6 DRM3/7
7 DRM2/6
8 DRM1/5
15 COM D/0
16 REF D/0
9-10 / Reserved
11 Fast stop +

Fast stop

12| Fast stop –
13| 485 B1| EMS
14| 485 A1
17| CANL_P| CAN for parallel connection of inverters
18| CANH_P
19-20| /| Reserved

Connect the Meter and BMS communication cables

WATTSONIC-4to20kw-3P-Series-High-Voltage-ESS-17

Connect other cables

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Installing the COM Connector

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PV string connection

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Power cable of the battery connection

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Documents / Resources

| WATTSONIC 4to20kw 3P Series High Voltage ESS [pdf] Installation Guide
4-5-6-8-10-12-3P-3G25, 10-12-15-20-3P-3G40, 4to20kw 3P Series High Voltage ESS, 4to20kw 3P Series, 4to20kw 3P Series ESS, High Voltage ESS, ESS
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