Solis S5-GR3P12K 12kW Three-Phase 2-MPPT Grid-Tied Inverter
The Solis S5-GR3P12K (part number SOL-S5-GR3P-12K-DC) is a 12 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 4 string inputs at 32 A per MPPT and 16 A per string, a recommended maximum PV input of 18 kW (150% DC/AC ratio), and a maximum efficiency of 98.6% (98.0% EU efficiency). With a maximum output of 13.2 kW, optional AFCI protection, IP66 ingress protection, THDi below 2%, adaptive weak grid support, and optional 24-hour load consumption monitoring, the S5-GR3P12K is a compact inverter for residential and small commercial three-phase PV systems. G98/G99 certified. Available from DECO Group, a UK-based solar trade wholesaler.
Key Technical Details
- Part number: SOL-S5-GR3P-12K-DC
- Supplier part number: S5-GR3P12K
- Inverter type: Three-phase grid-tied string inverter
- Rated AC output power: 12 kW
- Maximum output power: 13.2 kW
- Maximum apparent output power: 13.2 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: 18.2 A / 17.3 A
- Maximum output current: 19.1 A
- Power factor: greater than 0.99 (0.8 leading to 0.8 lagging)
- THDi: less than 2%
- Maximum efficiency: 98.6%
- EU efficiency: 98.0%
- Transformer: None (transformerless)
- Recommended maximum PV power: 18 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: 32 A / 32 A per MPPT
- Maximum short-circuit current: 40 A / 40 A per MPPT
- MPPT quantity: 2
- Maximum string inputs: 4 (2 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: Intelligent fan-cooling
- Noise emission: less than 60 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: 19.6 kg
Key Features
- 12 kW rated output with 13.2 kW maximum and 18 kW recommended PV input for greater than 150% DC/AC oversizing
- 2 MPPT trackers with 4 string inputs for flexible split-array design
- 98.6% maximum efficiency and 98.0% EU efficiency
- THDi below 2% for clean power export
- Optional AFCI protection for proactive DC arc-fault fire risk reduction
- Adaptive weak grid support for challenging grid conditions
- IP66 rated for dependable outdoor installation
- 24-hour load consumption monitoring with compatible smart meter
- Export power control support for grid-limited applications
- Compact and lightweight at 19.6 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)
Protection Features
- AFCI (optional, depending on configuration)
- DC reverse polarity protection
- DC short-circuit protection
- Output overcurrent protection
- Over-temperature protection
- Integrated DC switch
- Surge protection
- Anti-islanding protection
- IP66 ingress protection
Certifications and Compliance
- G98 / G99
- G100
- EN 50549
- NRS 097-2-1
- CE certified
Installation Notes
- At 19.6 kg, single-person installation is feasible
- IP66 rated for indoor or outdoor installation
- Install vertically or with a slight backward tilt up to 15 degrees
- Allow at least 500 mm clearance around sides and bottom, 1,000 mm above
- For startup: AC ON first, then DC ON. For shutdown: Grid Off, then AC OFF, then DC OFF
- Must be installed by a qualified electrician or technician
Warranty
- Standard warranty: 5 years
- 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-GR3P12K compare to the 10kW and 15kW models?
The 12 kW sits between the 10 kW and 15 kW in the GR3P range. All share the same 310 x 563 x 219 mm dimensions. The 12 kW and 15 kW both have 4 string inputs (2 per MPPT at 32 A), while the 10 kW has only 2 strings (1 per MPPT at 16 A). The 10 kW uses natural convection cooling (silent), while the 12 kW and 15 kW use intelligent fan-cooling.
Does the Solis S5-GR3P12K include monitoring equipment?
No. Data logger, CT, meter, and export power manager are sold separately. For single-inverter export control, use the SOL-METER-3PH-CT3 with a data logging stick. For multi-inverter systems, use the EPM3-5G-PRO or EPM3-5G-PLUS.
Can I extend the warranty?
Yes. The standard 5-year warranty can be extended to 10 years or 20 years with the appropriate warranty extension parts.
About Solis
Ginlong Solis, established in 2005, is an internationally recognised manufacturer of solar inverters for residential, commercial, and utility-scale applications. Designed by a global R&D team of specialists from eight countries, Solis inverters deliver high efficiency, wide input voltage ranges, and precise MPPT performance.
DECO Group supplies Solis grid-tied inverters across the S5-GR3P, S5-GC, and S6 series alongside compatible monitoring accessories, export power meters, and extended warranty packages. Browse our inverter catalogue for the complete Solis range.
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.
