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By Sona Solar Knowledge & Solar Systems Education Team

On October 29, 2025

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Mastering Sunsynk 5kW & 8kW Hybrid Inverters: Installation, Operation & Troubleshooting

This comprehensive guide covers the installation, operation, and troubleshooting for the Sunsynk 5kW and 8kW Hybrid Inverters. As multifunctional inverters that combine a solar charger, battery charger, and inverter into a single unit, these models are designed to provide reliable, uninterruptible power, making them a top choice for homes and businesses in Zimbabwe.

Sunsynk Hybrid Inverters

Important Safety Instructions

Critical Warnings

All wiring must be performed by a qualified professional.
Do not disassemble the inverter. For service, take it to a professional service center.
To reduce the risk of electric shock, disconnect all wires before maintenance.
Be extremely cautious when working with metal tools around batteries.
Ensure the inverter is connected to a permanent grounded wiring system.
Never short circuit the AC output and DC input.

Installation Guide

Mounting Instructions

This IP65-rated hybrid inverter is designed for outdoor use but must meet specific conditions. Install it on a vertical wall with adequate load-bearing capacity, ensuring clearances of at least 50cm on all sides and 100cm in front for proper air circulation.

Avoid installing in: direct sunlight, areas with flammable materials, or environments with high humidity (>95%).

Battery Connection

A separate DC over-current protector between the battery and inverter is required. Ensure you use the correct cable size to prevent injury and ensure efficient operation.

Model	Wire Size	Cable (mm²)	Torque Value
5/8kW	2AWG	35	24.5Nm

CRITICAL: Before making the final DC connection, ensure the positive (+) terminal is connected to positive and negative (-) to negative. Reverse polarity will damage the inverter.

AC Input/Output Connection

Install a separate AC breaker between the inverter and the AC input power source. The recommended breaker size is 50A for 5kW and 80A for 8kW models.

Model	Wire Size	Cable (mm²)	Torque Value
5kW	8AWG	8	1.2Nm
8kW	6AWG	13	1.2Nm

PV Connection

Install a separate DC circuit breaker between the inverter and PV modules. Ensure the Open Circuit Voltage (Voc) of your PV array does not exceed the inverter's maximum and is higher than the minimum start voltage.

Inverter Model	PV Input Voltage	MPPT V. Range	MPP Trackers	Strings per Tracker
5kW	370V (100V-500V)	125Vdc-425Vdc	2	1+1
8kW	370V (100V-500V)	125Vdc-425Vdc	2	2+2

Operation & LCD Display

Understanding the Main Screen

The touchscreen LCD provides a real-time overview of your system's status, showing energy flow between Solar, Grid, Load, and Battery. A central "ON" icon confirms normal operation, while any fault codes (F01-F64) will be displayed for easy diagnosis.

Fault Codes & Troubleshooting

Common Error Codes

Code	Description	Solution
F18/F34	AC Over Current	Check that backup load power is within range; restart.
F20	DC Over Current	Check PV/battery connections; reduce load on startup.
F24	DC Insulation Impedance	Check PV panel connections and grounding.
F35	No AC Grid	Confirm grid connection is active and the grid switch is on.
F42	AC Line Low Voltage	Check if AC voltage is within standard range.
F56	DC Busbar Voltage Low	Battery voltage is too low; charge the battery.
F64	Heat Sink High Temp	Check ambient temperature; turn off for 10 mins and restart.

Technical Datasheet

Sunsynk 5kW & 8kW Specifications

Specification	Sunsynk 5kW	Sunsynk 8kW
Battery Voltage Range	40V - 60V
Max. Charging/Discharging Current (A)	120A	190A
Max. DC Input Power (W)	6500W	10400W
MPPT Range (V)	125V - 425V
No. of MPPT Trackers / Strings	2 / 1+1	2 / 2+2
Rated AC Output Power (W)	5000W	8000W
Peak Power (Off-Grid)	2x rated power, 10s
Max Continuous AC Passthrough (A)	35A	50A
Weight (Kg)	32	32
Protection Degree	IP65
Warranty	5 Years

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