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The Solis S5-GR3P15K is a 15kW three-phase grid-tied inverter designed for larger residential and light commercial solar systems. With dual MPPTs, up to 20kW recommended PV power, 98.6% maximum efficiency and support for high-current modules, it offers a reliable and cost-effective solution for larger rooftop PV installations.
Large three-phase residential solar systems
Light commercial rooftop installations
Properties with two main PV orientations
Systems using higher-power solar modules
Export-controlled grid-connected systems
Sites requiring remote monitoring and control
2 independent MPPTs
Up to 20kW recommended PV power
Up to 32A input current per MPPT
Wide 160β1000V MPPT operating range
1100V maximum PV input voltage
Up to 98.6% maximum efficiency
Export power control support
SolisCloud remote monitoring and control
Automatic voltage stabilisation for weak-grid conditions
Integrated AFCI protection
IP66 protection
Wi-Fi communication dongle included
The S5-GR3P15K supports up to 20kW of recommended PV power, allowing a substantial solar array to be connected to its 15kW AC output.
Two MPPTs with four maximum PV string inputs provide flexibility for different roof orientations or separate array sections. The 160β1000V MPPT range and 1100V maximum input voltage also support a wide range of commercial and residential string configurations.
The inverter supports RS485 together with optional Wi-Fi and GPRS communication. SolisCloud provides remote system monitoring, upgrades and control, while export power control helps manage how much solar energy is sent back to the grid.
Automatic voltage stabilisation technology also supports more stable generation under weak-grid conditions.
| Specification | S5-GR3P15K |
|---|---|
| Rated AC Output | 15kW |
| Recommended Max. PV Power | 20kW |
| MPPTs / Max. Input Strings | 2 / 4 |
| Max. PV Input Current | 32A / 32A |
| Max. Short-Circuit Current | 40A / 40A |
| Max. PV Input Voltage | 1100V |
| MPPT Voltage Range | 160β1000V |
| Start-Up Voltage | 180V |
| Rated Grid Voltage | 230V / 400V |
| Rated Grid Frequency | 50Hz |
| Rated / Max. Output Current | 23.8A |
| Maximum Efficiency | 98.6% |
| EU Efficiency | 98.0% |
| Protection Rating | IP66 |
| Operating Temperature | -25Β°C to +60Β°C |
| Cooling | Intelligent redundant fan cooling |
| Dimensions | 310 Γ 563 Γ 219mm |
| Weight | 18.8kg |
| Display | LCD |
| Communication | RS485; optional Wi-Fi, GPRS |
| Country of Manufacture | China |
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Integrated protection includes DC reverse-polarity protection, short-circuit protection, output over-current protection, surge protection, grid monitoring, anti-islanding protection, temperature protection and an integrated DC switch.
AFCI protection is also supported, helping reduce the risk associated with DC arc faults. The IP66 enclosure is designed for demanding installation environments.
Complies with AS/NZS 4777.2:2020, IEC 62116, IEC 61727, IEC 60068, IEC 61683 and EN 50530, together with applicable IEC 62109-1/-2 and IEC 61000-6-1/-2/-3/-4 safety and EMC requirements.
The S5-GR3P15K combines strong PV capacity, high efficiency and straightforward three-phase grid connection in a compact inverter platform.
Its dual MPPT design, support for up to 20kW of PV, export control and SolisCloud monitoring make it a practical choice for larger homes and light commercial sites that want reliable solar generation without battery integration.
All our products are covered by the Manufacturer's Warranty, which guarantees that they will be free from defects in materials and workmanship under normal use and service. The specific terms and duration of the warranty may vary depending on the product and the manufacturer. Please refer to the product's documentation or contact our customer support team for detailed warranty information.
Warranty Claim Process
In the unfortunate event that you encounter a faulty product, we want to make the warranty claim process as seamless as possible for you. To initiate a warranty claim, please follow these steps:
If damage is confirmed to be from normal wear-and-tear, drops, unauthorized repairs, or other non-warranty factors, service and shipping fees will apply. In such cases, we will contact the customer for approval before proceeding with paid repairs.
Unfortunately we cannot provide loaner units during the warranty repair process. For mission-critical equipment, we highly recommend purchasing backup units to prevent downtime in case of defects.
You have 30 calendar days to return an item from the date you received it.
To be eligible for a return:
Upon receiving your order, we kindly request that you thoroughly inspect all packages within 7 days of delivery. This inspection period is crucial as it allows you ample time to identify any visible damage caused during transit. Please keep in mind that promptly reporting any freight damage is vital in safeguarding your right to file a claim and ensuring a swift resolution.
Should you identify any freight damage during the inspection, we urge you to notify us immediately. Our customer support team is ready to assist you through the claim filing process and provide the necessary guidance to ensure a smooth and hassle-free experience.
The advertised price for this product includes the applicable STC battery rebate, applied as a pre-discount at the time of purchase.
To be eligible for the battery rebate:
Supply-only purchases are not eligible for the battery rebate.
By proceeding with this purchase, the customer agrees to assign all eligible Small-scale Technology Certificates (STCs) associated with the battery installation to Solar Battery Supermarket (or its nominated agent).
This assignment allows the rebate to be applied as a point-of-sale discount.
If the customer does not agree to assign the STCs, the full non-rebated price of the battery system will apply.
Installation by a licensed and accredited installer is mandatory to qualify for the rebate-adjusted price.
Standard metro installation is available from $500, subject to property assessment.
Additional works (including switchboard upgrades, long cable runs, or non-standard installations) may incur extra charges and will be quoted and approved prior to installation.
To assess eligibility and proceed with installation, the customer may be required to provide:
Failure to provide required information may delay installation or affect rebate eligibility.
This rebate offer does not limit your rights under Australian Consumer Law.