Solis S5-GR3P6K 6kW Three-Phase 2-MPPT Grid-Tied Inverter
The Solis S5-GR3P6K (part number SOL-S5-GR3P-6K-DC) is a 6 kW three-phase, 2-MPPT grid-tied string inverter from the Solis S5 GR3P series. Part of the S5-GR3P(3-20)K range, it features 2 MPPT trackers with 2 string inputs at 16 A per string, a recommended maximum PV input of 9 kW (150% DC/AC ratio), and a maximum efficiency of 98.3% (97.7% EU efficiency). With a maximum output of 6.6 kW, optional AFCI protection, IP66 ingress protection, natural convection cooling for near-silent operation (less than 30 dB), THDi below 2%, and adaptive weak grid support, the S5-GR3P6K is a compact entry-level three-phase inverter for residential PV systems. G98/G99 certified. Available from DECO Group, a UK-based solar trade wholesaler.
Key Technical Details
- Part number: SOL-S5-GR3P-6K-DC
- Supplier part number: S5-GR3P6K
- Inverter type: Three-phase grid-tied string inverter
- Rated AC output power: 6 kW
- Maximum output power: 6.6 kW
- Maximum apparent output power: 6.6 kVA
- Rated grid voltage: 3/N/PE, 220 V / 380 V, 230 V / 400 V
- Rated grid frequency: 50 / 60 Hz
- Rated grid output current: 9.1 A / 8.7 A
- Maximum output current: 9.5 A
- Power factor: greater than 0.99 (0.8 leading to 0.8 lagging)
- THDi: less than 2%
- Maximum efficiency: 98.3%
- EU efficiency: 97.7%
- Transformer: None (transformerless)
- Recommended maximum PV power: 9 kW
- Maximum DC input voltage: 1,100 V
- Rated DC voltage: 600 V
- MPPT voltage range: 160 V to 1,000 V
- DC startup voltage: 180 V
- Maximum input current: 16 A / 16 A per MPPT
- Maximum short-circuit current: 20 A / 20 A per MPPT
- MPPT quantity: 2
- Maximum string inputs: 2 (1 per MPPT)
- Integrated DC switch: Yes
- AFCI: Optional (supported depending on configuration)
- Communication: RS485; optional WiFi, GPRS
- Display: LCD
- DC connection: MC4
- AC connection: Quick connection plug
- Cooling: Natural convection
- Noise emission: less than 30 dB(A)
- Ingress protection: IP66
- Operating temperature: -25°C to +60°C
- Relative humidity: 0% to 100%
- Maximum operating altitude: 4,000 m
- Self-consumption (night): less than 1 W
- Dimensions: 310 x 563 x 219 mm (W x H x D)
- Weight: 17.6 kg
Key Features
- 6 kW rated output with 6.6 kW maximum and 9 kW recommended PV input
- 2 MPPT trackers with 2 string inputs for split-array flexibility
- 98.3% maximum efficiency and 97.7% EU efficiency
- THDi below 2% for clean power export
- Natural convection cooling for near-silent operation at less than 30 dB(A)
- Optional AFCI protection for proactive DC arc-fault fire risk reduction
- Adaptive weak grid support
- IP66 rated for dependable outdoor installation
- Export power control support with compatible accessories
- 24-hour load consumption monitoring with compatible smart meter
- Compact and lightweight at 17.6 kg
- Night self-consumption of less than 1 W
- SolisCloud ready for remote monitoring
System Compatibility
- Part of the Solis S5-GR3P(3-20)K series
- MC4 DC connectors; AC quick connection plug
- This inverter does not include a data logger, CT, meter, or export power manager
- For export power control of a single inverter: use the SOL-METER-3PH-CT3 (requires a data logging stick such as S5-WiFi-ST)
- For export power control of multiple inverters: use the EPM3-5G-PRO (or EPM3-5G-PLUS)
- Extended warranty available: SOL-WAR-10Y-S5-GR3PK (5 additional years) or SOL-WAR-20Y-S5-GR3PK (15 additional years)
Certifications and Compliance
- G98 / G99
- G100
- EN 50549
- NRS 097-2-1
- CE certified
Installation Notes
- At 17.6 kg, single-person installation is feasible
- IP66 rated for indoor or outdoor installation
- Natural convection cooling — no fan noise
- Must be installed by a qualified electrician or technician
Warranty
- Standard warranty: 5 years (10 years standard in the Netherlands, Belgium, France, Germany, Poland, and Italy)
- Extended warranty: extendable to 10 years (SOL-WAR-10Y-S5-GR3PK) or 20 years (SOL-WAR-20Y-S5-GR3PK)
Common Questions
Click a question below to reveal the answer.
How does the Solis S5-GR3P6K compare to the 10kW model?
Both the 6 kW and 10 kW share the same compact enclosure (310 x 563 x 219 mm), 2 MPPT / 2 string design, natural convection cooling (less than 30 dB), and IP66 protection. The 6 kW accepts 9 kW PV input (vs 15 kW) and achieves 98.3% max efficiency (vs 98.5%). Both use the same warranty extension parts.
Does the Solis S5-GR3P6K include monitoring equipment?
No. Data logger, CT, meter, and export power manager are sold separately.
Can I extend the warranty?
Yes. The standard 5-year warranty (10 years in selected EU countries) can be extended to 10 or 20 years.
About Solis
Ginlong Solis, established in 2005, is an internationally recognised manufacturer of solar inverters for residential, commercial, and utility-scale applications.
DECO Group supplies Solis grid-tied inverters across the full S5-GR3P range from 3 kW to 20 kW alongside compatible monitoring accessories and extended warranty packages. Visit decogroup.co.uk for the full catalogue.
About DECO Group
We supply Solis inverters and system accessories to professional solar installers and electrical contractors across the UK. Visit decogroup.co.uk for the full catalogue.
