Grundfos RSI Solar Inverter for Off-Grid Water Solutions
The Grundfos RSI is an intelligent IP66 off-grid solar inverter designed to run with large Grundfos pumps, greatly expanding possibilities for solar water solutions with low or nearly zero operating costs. Incredibly easy to setup and install, the RSI pairs seamlessly with SP submersible pumps and a broad range of Grundfos pumps, creating a modular system that offers maximum component flexibility for agricultural, municipal, and commercial water supply applications.
As an authorized Grundfos Water Pump Dealer in Dubai, we supply the complete Grundfos RSI solar inverter range with genuine warranty and technical support across the UAE.
RSI Model Range
| Power (P2) | DC Input (to drive) | AC Output (to motor) |
|---|---|---|
| 2.2 to 37 kW | Max. 800 VDC | 3 × 380-415 V |
| 1.5 to 15 kW | Max. 400 VDC | 3 × 208-240 V |
Technical Specifications
| Category | Parameter | 3 × 380-415 V | 3 × 208-240 V |
|---|---|---|---|
| Installation Environment | Min. Ambient Temperature | -10 °C | -10 °C |
| Installation Environment | Max. Ambient Temperature | 60 °C | 60 °C |
| Installation Environment | Max. Relative Humidity | 100% | 100% |
| Electrical Data | Min. MPP Voltage | 400 VDC | 230 VDC |
| Electrical Data | Max. Input Voltage | 800 VDC | 380 VDC |
| Electrical Data | Min. Frequency | 5 Hz | 5 Hz |
| Electrical Data | Max. Frequency | 60 Hz | 60 Hz |
| Electrical Data | Output Phase | 3 Phase | 3 Phase |
| Electrical Data | Output Rated Voltage | 415 VAC | 220 VAC |
| Enclosure | Enclosure Class | IP66 | IP66 |
Product Number Reference
3 × 380-415 V Models:
| Power Size (kW) | Product Number | Rated Output Current (A) |
|---|---|---|
| 2.2 | 99044348 | 5.6 |
| 3.0 | 99044349 | 8 |
| 4.0 | 99044350 | 9.6 |
| 5.5 | 99044351 | 12 |
| 7.5 | 99044352 | 16 |
| 11 | 99044363 | 23 |
| 15 | 99044364 | 31 |
| 18.5 | 99044365 | 38 |
| 22 | 99044366 | 46 |
| 30 | 99044367 | 61 |
| 37 | 99044368 | 72 |
3 × 208-240 V Models:
| Power Size (kW) | Product Number | Rated Output Current (A) |
|---|---|---|
| 1.5 | 99090622 | 8 |
| 2.2 | 99090633 | 11 |
| 3.0 | 99090634 | 12.5 |
| 4.0 | 99090635 | 18 |
| 5.5 | 99090636 | 24.2 |
| 7.5 | 99090637 | 31 |
| 11 | 99090638 | 48 |
| 15 | 99090639 | 62 |
Key Features & Benefits
Weatherproof for Outdoor Installation With an IP66 enclosure class rating, the RSI is resistant to rain, dust, and sand, eliminating the requirement for a weatherproof cabinet with ventilation and air filter. The inverter handles ambient temperatures up to 60°C. Placing the solar inverter beneath the solar panel array means only a very short DC cable is required—an extremely important safety advantage for users and personnel.
Continuous System Optimisation Advanced MPPT (Maximum Power Point Tracking) software continuously optimises the system by compensating for environmental effects on the solar panel array, improving power and water output by up to 30%. Environmental compensation covers:
- Temperature compensation
- Handling of multiple local power points due to partial shading
- Protection against power oscillation due to rapid cloud movement
Quick Setup with Grundfos Pump Motors The quick setup Wizard pairs the RSI rapidly with a broad range of Grundfos pumps. With a built-in Grundfos motor library, all that is required is confirmation of motor type and pre-set value—no parameter input is necessary for Grundfos pumps. This means:
- Setup completed in less than 5 minutes
- RSI can be configured in the workshop prior to plug-and-pump experience on site
AC/DC Compatible Switch the solar inverter to mains power or generator when required, because the drive is compatible with both AC and DC power input without changing any parameter settings. Simply connect the two power sources via an external switchover box to take advantage of solar energy during the day and mains power or generator during the night.
Complete Solar Water System Package
A complete solar energy water supply system with the RSI solar inverter includes:
- Grundfos pump 50/60 Hz
- RSI solar inverter
- Sine wave filter
- Solar panels
- Circuit breaker
- Surge protection
- Dry running sensor
An Investment That Pays for Itself
There are substantial benefits over time when installing a solar water solution, and payback time is often surprisingly quick. If you already have an SP pump installed and can see how high your energy and fuel transport costs really are, then you should consider a solar energy solution using the RSI solar inverter.
With Grundfos, retrofitting a solar energy source to your SP pump is straightforward and the cost benefit is immediate. The RSI eliminates ongoing electricity costs and reduces dependency on diesel generators, delivering significant operational savings throughout the system lifetime.
Compatible Pump Types
The RSI is designed to work with a broad range of submersible and surface pumps up to 37 kW:
Submersible Pumps
- Grundfos SP series borehole pumps
- Deep well applications
- Groundwater extraction
Surface Pumps
- Irrigation systems
- Water transfer
- Pressure boosting applications
Applications
Agriculture & Irrigation
- Crop irrigation systems
- Livestock watering
- Greenhouse water supply
- Drip irrigation systems
Rural Water Supply
- Village water schemes
- Remote community supply
- Off-grid locations
Municipal Applications
- Small water distribution systems
- Remote pumping stations
- Supplementary solar power
Commercial & Industrial
- Factory water supply
- Construction site dewatering
- Mining operations
Why Choose RSI for Solar Pumping?
Up to 30% More Water Output Advanced MPPT algorithms extract maximum power from solar panels under all conditions, including partial shading and variable cloud cover.
True Outdoor Installation IP66 rating eliminates costly weatherproof enclosures and ventilation systems required by standard inverters.
Plug-and-Pump Setup Built-in Grundfos motor library enables configuration in under 5 minutes without complex parameter programming.
Hybrid Operation Seamless switching between solar and AC power ensures 24-hour water availability when required.
Retrofit Capability Easily convert existing grid-powered SP pump installations to solar operation with immediate cost savings.
Modular Flexibility Mix and match system components to meet specific application requirements and budget constraints.
Correct System Sizing
Getting pump sizing right is important and should always start with the specific application and a focus on the entire system. Taking into consideration the seasonal, climatic, and geographical fluctuations in the availability of solar energy is also necessary.
Sizing Considerations:
- Daily water demand requirements
- Total dynamic head (TDH)
- Available solar irradiation
- Seasonal variations
- Storage tank capacity
- Peak sun hours
Genuine Grundfos Accessories & Parts
Complete your RSI solar water system with genuine Grundfos accessories including sine wave filters, surge protection devices, dry running sensors, circuit breakers, and cable assemblies. We stock components for complete solar pumping solutions.
Select Grundfos Pumps
Browse our complete inventory of Grundfos RSI solar inverters and compatible SP submersible pumps. As Grundfos Pump Suppliers in Dubai, we provide competitive pricing, technical consultation, and prompt delivery across Dubai, Sharjah, Abu Dhabi, Ajman, and all UAE locations.
Contact us for:
- Solar water system sizing and design
- RSI model selection based on pump size
- Solar panel array recommendations
- Complete system packages
- Retrofit solutions for existing pumps
- Competitive quotations
- Delivery schedules
Sustainable Water Solutions for the Future
The Grundfos RSI solar inverter transforms solar energy into reliable water supply, eliminating electricity costs and reducing environmental impact. With weatherproof construction, advanced MPPT optimization, and seamless Grundfos pump integration, the RSI delivers a solar water solution that pays for itself through years of low-cost operation. Whether for agricultural irrigation, rural water supply, or commercial applications, the RSI provides the intelligent off-grid pumping capability that modern water challenges demand.