Score only. The Solar Review Inverter Assessment Criteria compares the Sunways STS 3~6KTL series solar inverter against the industries best known specifications. The result, a solar inverter comparison with no room for discretionary bias and the transparency you desire.  

Make and model:  Sunways STS 3~6KTL. 

Variants:  3 / 3.6 / 4.2 / 4.6 / 5 / 6 kW.

Design, Performance.

Features, Software.

Contents.

The following content for the Sunways STS 3~6KTL Series solar inverter should be used as a guide only. Individual circumstances and compatibilities should always be taken into account when selecting the right solar inverter for any given installation. This content has been built using the Solar Review Inverter Assessment Criteria 2.5 or above based on available product specifications at the time of writing.  

Design.

Sunways

STS 3~6KTL Design; VERY GOOD
  • AC Coupled battery compatibility.
  • Release June 2020.
  • Natural convection (Fanless) cooling.
  • TÜV SUD Certified.
  • Standard.
  • IP 65.

Features.

Sunways

STS 3~6KTL Features; VERY GOOD
  • 2 x MPPTs.
  • OLED & LED graphic interface.
  • WiFi & Ethernet (plus 4G optional).
  • Inbuilt DC Isolator.
  • No manufacturer supplied module-level optimisation options.
  • No manufacturer supplied module-level rapid shutdown options.
  • No manufacturer supplied expanded monitoring options.
  • No manufacturer supplied EV options.
  • No expanded appliance control
  • MPPT only shadow management.
  • Remote operational parameter support.

Performance.

Sunways

STS 3~6KTL Performance; SUPERIOR
  • 97.5% Weighted efficiency.
  • Min temperature range -30°C (-37.4°F).
  • Max temperature range +60°C (140°F).
  • Temperature derating point "not listed".
  • Weight 13kg (28.7 lbs).
  • Noise emission max 25 dB (A).

Guarantee.

Sunways

STS 3~6KTL Guarantee; EXCEPTIONAL
  • 12-year parts warranty.
  • 12-year service warranty.
  • Authorised installer network with NO additional end-user benefits.

Software.

Sunways

STS 3~6KTL Software; GOOD
  • Sunways Web Monitoring Portal
  • SunwaysHome for System Owners (iOS & Android)
  • SunwaysPro for Installers/Distributors (iOS & Android)
  • Alerts & fault diagnosis.
  • Module-level monitoring options.

OVERALL.

Sunways

STS 3~6KTL Overall; VERY GOOD
  • Design 3.7
  • Features 3.4
  • Performance 3.8
  • Guarantee 4.5
  • Software 3.0

Comparison.

*AVG references industry average specifications.

Insight.

How was the score for the Sunways STS 3~6KTL solar inverter calculated? By using the Solar Review Inverter Assessment Criteria V2.5 >

How does the entire current range of Sunways solar inverters compare against each other? Discover now >

REVIEW OVERVIEW
Design
Features
Performance
Guarantee
Software
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