Solis S5-GR3P15K 15kW Three-Phase 2-MPPT Grid-Tied Inverter
The Solis S5-GR3P15K (part number SOL-S5-GR3P-15K-DC) is a 15 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 16 A per string, a maximum PV DC input of 22.5 kW (150% DC/AC ratio), and a maximum efficiency of 98.6% (98% EU efficiency). With a maximum AC output of 16.5 kW, integrated AFCI arc-fault protection, IP66 ingress protection, and SolisCloud remote monitoring capability, the S5-GR3P15K is a compact and lightweight inverter for residential and small commercial three-phase PV installations. G99 certified. Available from DECO Group, a UK-based solar trade wholesaler.
Key Technical Details
- Part number: SOL-S5-GR3P-15K-DC
- Supplier part number: S5-GR3P15K
- Inverter type: Three-phase grid-tied string inverter
- Rated AC output power: 15 kW
- Maximum AC output power: 16.5 kW
- Surge AC power (1 second): 16.5 kW
- Maximum efficiency: 98.6%
- EU efficiency: 98%
- Transformer: None (transformerless)
- Maximum PV DC input power: 22.5 kW
- DC/AC ratio: 150%
- Maximum DC input voltage: 1,100 V
- MPPT voltage range: 180 V to 1,000 V
- DC startup voltage: 180 V
- DC shutdown voltage: 160 V
- Maximum DC input current: 64 A total
- Maximum input current per string: 16 A
- MPPT quantity: 2
- Maximum DC inputs: 4 (2 per MPPT)
- Connector: MC4 (8 included)
- Integrated DC switch: Yes
- AFCI: Yes (integrated DC arc-fault circuit protection)
- Surge protection: Type II (DC and AC)
- DC reverse polarity protection: Yes
- Ingress protection: IP66
- Weight: 18.8 kg
Key Features
- 15 kW rated output with 16.5 kW maximum and 22.5 kW DC input for 150% DC/AC oversizing
- 2 MPPT trackers with 4 string inputs (16 A per string) for flexible array design
- 98.6% maximum efficiency and 98% EU efficiency
- Integrated AFCI (DC arc-fault circuit protection) for proactive fire risk reduction
- IP66 rated for outdoor installation
- Integrated DC switch for safe maintenance and emergency shutdown
- Compact and lightweight at 18.8 kg
- SolisCloud ready for remote monitoring, diagnostics, and firmware upgrades
System Compatibility
- Part of the Solis S5-GR3P(3-20)K series
- MC4 DC connectors (8 included)
- 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)
- For export power control of multiple inverters: use the EPM3-5G-PLUS (has built-in data logger)
- Extended warranty available: SOL-WAR-10Y-S5-GR3PK (5 additional years) or SOL-WAR-20Y-S5-GR3PK (15 additional years)
Protection Features
- Integrated AFCI (DC arc-fault circuit protection)
- DC reverse polarity protection
- Integrated DC switch
- Surge protection: Type II (DC and AC)
- IP66 ingress protection
Certifications and Compliance
- G99
- G100
- EN 50549
- NRS 097-2-1
- CE certified
Installation Notes
- At 18.8 kg, single-person installation is feasible
- IP66 rated for indoor or outdoor installation
- Must be installed by a qualified electrician or technician in compliance with local wiring regulations
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.
Does the Solis S5-GR3P15K 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-PLUS.
What is the difference between the Solis S5-GR3P 15kW and 20kW?
Both are in the S5-GR3P(3-20)K series with 2 MPPTs and 4 string inputs. The 15 kW has a rated output of 15 kW (16.5 kW max) with 22.5 kW DC input, while the 20 kW delivers 20 kW rated (22 kW max) with 30 kW DC input. The 15 kW weighs 18.8 kg vs 20.8 kg for the 20 kW. They use the same warranty extension parts.
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.
