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Ningbo Sunways Technologies Co Ltd
Parsed from the manufacturer datasheet, install manual, and warranty document. Confirm against the linked PDFs before relying on a value for a quote or installation.
Rated Power
4.2 kW
Max Efficiency
98.1%
Phases
Single Phase
Max Input Voltage
—
Min Input Voltage
—
Max Input Current
—
Output Voltage
—
Max Output Current
—
Country of Origin
Unknown
Series
STS-xKTL-P
European Efficiency
97.5%
Dimensions
0 x 0 x 0 mm
IP Rating
IP65
Operating Temp
-25°C to 60°C
Cooling
Natural
Battery Compatible
No
Backup Capable
No
ESM Compliant
No
Black Start
No
Grid Forming
No
Export Limiting
No
Remote Monitoring
No
CEC Approved
29 Sept 2025
Approval Expiry
22 June 2027
Status
Active
Eligible for Rebates
Yes
Years in AU Market
4 years
Australian Office
Not verified
CEC-Approved Batteries
0
CEC-Approved Panels
0
Category
Budget
$840–$1,680
Perth installed price estimate · medium confidence
Prices vary by installer, configuration, and site complexity. Get exact quotes via our installer matching.
From May 1, 2026, all new battery installations in WA require CSIP-AUS compliant inverters. Verify ESM status with your installer.
Perth's high ambient temperatures (regularly 35°C+) can reduce inverter efficiency and trigger thermal throttling. For installations in direct sun or non-ventilated garages, consider inverters with active cooling and wide operating temperature ranges. All grid-connected installations require Western Power approval.
Compare this inverter with batteries for a complete system analysis
Based on 5 PSH/day (BOM) with 15% system derate.
The Ningbo Sunways Technologies Co Ltd STS-4.2KTL-P (AS4777-2 2020) against the closest-power inverters from other brands.
| Specification | Ningbo Sunways Technologies Co Ltd STS-4.2KTL-P (AS4777-2 2020)Ningbo Sunways Technologies Co Ltd | Beijing Hua Xin Liu He Investment (australia) Pty Ltd Z20I4K2D-2 (AS4777-2 2020)Beijing Hua Xin Liu He Investment (australia) Pty Ltd | Beijing Hua Xin Liu He Investment (australia) Pty Ltd Z20I4K2D (AS4777-2 2020)Beijing Hua Xin Liu He Investment (australia) Pty Ltd |
|---|---|---|---|
| Rated power? | 4.2 kW | 4.2 kW | 4.2 kW |
| Max efficiency? | 98.1%best value | 0.0% | 0.0% |
| MPPT trackers? | Not verified | Not verified | Not verified |
| Phases | Single-phase | Single-phase | Single-phase |
| Type | Solar | Solar | Solar |
| Battery ready | No | No | No |
| Warranty | 0 years | Not verified | Not verified |
Specs from the CEC register and datasheet enrichment. Indicative — confirm exact figures with your installer.
Warranty summary
The warranty covers the inverter against defects in materials and workmanship, provided it's installed per instructions. Claims must be submitted via the service contact, but the warranty does not cover damage from improper installation or environment that does not meet specified requirements.
The warranty covers the inverter against defects in materials and workmanship, provided it's installed per instructions. Claims must be submitted via the service contact, but the warranty does not cover damage from improper installation or environment that does not meet specified requirements.
AI-summarised from the manufacturer warranty document. Always confirm against the linked PDF before relying on it for a claim.
From the install manual
Showing 16 of 16. The official install manual is the authoritative source — always confirm before acting.
Bus Voltage FaultcriticalCall your installerBus voltage is out of acceptable range.
Grid Frequency FaultcriticalCall your installerGrid frequency is out of expected range.
Grid Voltage FaultcriticalCall your installerGrid voltage exceeded tolerable limits.
ISO Over LimitationcriticalCall your installerInsulation resistance is exceeding limits.
PV Over VoltagecriticalCall your installerPV input voltage exceeded maximum levels.
AC Transducer FaultwarningFault detected in AC transducer.
DCI FaultwarningDirect current input fault detected.
E2 FaultwarningCall your installerAn unspecified internal error.
Flash FaultwarningCall your installerSoftware failure observed in flash memory.
GFCI Device FaultwarningCall your installerGFCI device is malfunctioning.
GFCI FaultwarningCall your installerGround Fault Circuit Interrupter has tripped.
Inverter Over TemperaturewarningCall your installerInverter's internal temperature exceeded safe limits.
Mains LostwarningPower supply has been interrupted.
Relay Check FailwarningCall your installerRelay system failure.
SCI FaultwarningSignal communication issue.
SPI FaultwarningSerial peripheral interface error.
Part of the Ningbo Sunways Technologies Co Ltd STS-xKTL-P series
Compare every Ningbo Sunways Technologies Co Ltd STS-xKTL-P variant side by side →
STH-10KTL-HT-P (AS4777-2 2020)
10 kW · 3φ
STH-12KTL-HT-P (AS4777-2 2020)
12 kW · 3φ
STH-3.6KTL-HS (AS4777-2 2020)
3.6 kW · 1φ
STH-3.6KTL-HSS (AS4777-2 2020)
3.6 kW · 1φ
STH-3KTL-HS (AS4777-2 2020)
3 kW · 1φ
STH-3KTL-HSS (AS4777-2 2020)
3 kW · 1φ
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About this data
All inverter specifications are sourced from the CEC Approved Products Register. Specifications are provided as published by the CEC and may differ from manufacturer datasheets. Verify current specifications with the manufacturer or your installer before purchasing. Not all listed models may be currently available in Western Australia.