S6 4kW Dual MPPT - Single Phase With DC

Solis 4kW S6 Dual MPPT Single-Phase Grid-Tie Inverter with Integrated DC Isolator

The Solis 4kW S6 is a single-phase, dual MPPT grid-tie inverter rated at 4,000W from the Ginlong Solis Series 6 range. This transformerless inverter accepts up to 6,000W of PV input across two independent MPPT trackers, each supporting 14A maximum input current for compatibility with high-efficiency and bifacial modules. With a maximum efficiency of 97.7%, Euro efficiency of 97.1%, and an IP66-rated enclosure with natural cooling, the S6 4kW is built for reliable residential and small commercial rooftop installations. The unit ships with an integrated DC isolator, integrated AFCI arc-fault protection, and a built-in Export Power Manager. Manufacturer part number: SOL-4.0-S6-DT-DC (MPN: S6-GR1P4K-DC). Available from DECO Group, a UK solar wholesaler for professional installers.

Key Technical Details

• Brand: Solis (Ginlong Solis)
• Model: S6 Series, 4kW Dual Tracker
• Part number (SKU): SOL-4.0-S6-DT-DC
• MPN: S6-GR1P4K-DC
• Supplier part number: S6-GR1P4K
• Inverter type: Grid-tie, transformerless
• Rated output power: 4,000W
• Max PV input power: 6,000W
• Max AC output power (5 minutes): 4,400W
• Surge AC power (1 second): 4,400W
• Phase configuration: Single phase
• Rated voltage: 330V
• Grid voltage: 220V / 230V
• MPPT quantity: 2
• Max DC inputs: 2
• Max input voltage: 600V
• MPPT voltage range: 90V to 520V
• DC start-up voltage: 120V
• DC shutdown voltage: 90V
• Max DC current: 28A (14A per string)
• Maximum efficiency: 97.7%
• Euro efficiency: 97.1%
• Connector type: MC4 (2 pairs included)
• Communication: RS485
• Integrated DC switch: Yes
• Protection rating: IP66
• Cooling: Natural
• Dimensions: 310 x 543 x 160mm (W x H x D)
• Weight: 14.5kg
• Warranty: 5 years standard

Key Features

• Super high frequency switching technology delivers a maximum efficiency of 97.7% and Euro efficiency of 97.1%.
• Dual MPPT design with precise MPPT algorithm enables independent tracking across two strings for improved energy yield on split or multi-orientation arrays.
• 14A maximum input current per string, compatible with high-efficiency and bifacial modules.
• Wide MPPT voltage range of 90V to 520V with a maximum PV input voltage of 600V and start-up voltage of 120V.
• Integrated AFCI (DC arc-fault circuit protection) proactively reduces fire risk on the DC side.
• Integrated DC switch provides emergency shutdown capability and safe isolation for PV maintenance.
• Export limitation built in via the integrated Export Power Manager (EPM). Requires a CT clamp, sold separately.
• DRM (Demand Response Mode) integrated for smart grid compliance.
• IP66-rated enclosure with natural cooling for reliable outdoor installation.
• RS485 communication with optional S3-WIFI-ST WiFi data logging stick for remote monitoring.

System Compatibility

• Compatible with high-efficiency and bifacial PV modules up to 14A per string.
• Export limitation requires a CT clamp (not included). For installations where the inverter is within 10m of the incoming power supply, use CT part number SOL-CT-100A-10M. A firmware upgrade to the latest version is required for this CT to function.
• For installations where the distance from inverter to incoming supply exceeds 10m, use the Solis Export Power Manager (SOL-EPM1-5G) instead.
• Optional S3-WIFI-ST WiFi data logging stick available for real-time remote monitoring via SolisCloud.

Installation Notes

• IP66-rated enclosure allows installation in exposed outdoor locations without additional weatherproofing.
• Natural cooling design with no moving parts, reducing long-term maintenance requirements.
• Dimensions of 310 x 543 x 160mm (W x H x D). At 14.5kg, this unit is manageable for a single installer but may benefit from assistance at awkward mounting heights.
• Two pairs of MC4 connectors included for direct connection to both PV string inputs.
• Must be installed by a qualified electrician or technician. All installations must adhere to local wiring regulations and standards.

Warranty

• 5-year standard manufacturer warranty.

Common Questions

What is the maximum PV input for the Solis 4kW S6 Dual MPPT?

The Solis 4kW S6 accepts up to 6,000W of PV input power across two independent MPPT trackers, with a maximum input voltage of 600V and 14A maximum current per string.

What are the dimensions and weight of the Solis 4kW S6?

The inverter measures 310 x 543 x 160mm (W x H x D) and weighs 14.5kg.

What CT clamp is needed for export limitation on the Solis 4kW S6?

For installations within 10m of the incoming power supply, use the SOL-CT-100A-10M (firmware upgrade required). For distances greater than 10m, use the Solis Export Power Manager (SOL-EPM1-5G).

How many MPPT trackers does the Solis 4kW S6 have?

The Solis 4kW S6 features a dual MPPT design with two independent trackers at 14A each, allowing two separate PV strings to be optimised independently for split or multi-orientation roof layouts.

About Solis

Since 2005, Ginlong Solis have been at the forefront of the solar inverter industry, recognised internationally for reliable and innovative energy management solutions tailored to regional market demands. The Series 6 range delivers the latest generation of grid-tied inverters, with precise MPPT algorithms, wide input voltage ranges, and maximum efficiencies exceeding 97% across residential and commercial applications.

DECO Group stocks the complete Solis S6 dual MPPT inverter range from 2.5kW to 6kW, alongside compatible CT clamps, export power managers, WiFi monitoring sticks, and balance-of-system accessories. Browse our Solis catalogue for the full selection of single-phase grid-tie inverters.

About DECO Group

We are a UK-based solar wholesaler and distributor providing trade supply to MCS-accredited installers and qualified electrical contractors. Our single-phase inverter range covers the entire Solis S6 series, from compact Mini models through to higher-capacity dual MPPT units, all backed by monitoring and export management accessories for complete system builds.