SolarRO SW 18
Solar-Powered Seawater Reverse Osmosis System
The SolarRO SW 18 provides clean, safe water from seawater and high-salinity water sources using renewable solar energy.
Equipped with the patented adaptive ANVS®* mechanical valve. The system automatically balances reverse-osmosis pressure when sunlight or voltage fluctuates — ensuring continuous operation even under direct solar or weak unstable grid power.
Operate the unit on solar only, grid only, or blending both for hybrid operation. By maximizing solar input, it reduces energy costs and carbon emissions — delivering sustainable, low-cost water wherever it’s needed.
Fast to Deploy. Easy to Operate.
The pre-assembled plug-and-play system guarantees fast installation with minimal commissioning effort. No on-site adjustments or continuous operator presence needed. With remote monitoring, self-regulating pressure, and low maintenance needs, the system delivers predictable and efficient performance, with fewer service visits.
Built to Last.
High-quality, corrosion-resistant components ensure long life in remote, off-grid, and demanding environments. Industry-standard components allow easy servicing and global availability of consumables and spare parts. The robust design maximizes reliability and extends the system’s operational life.
Trusted, Clean, Safe Water.
Treats seawater or high salinity borehole water. Removes sediments, salts, bacteria, and viruses, producing drinking-quality water that meets global safety standards.
100% Solar-Powered
- Operates directly from solar PV with zero emissions.
- ANVS® pressure control ensures optimal water output under changing power, temperature and salinity conditions.
- Integrates with grid or generator input for blended continuous operation.
Efficiency and Savings
- No diesel. No energy bills.
- 0.8 – 2 €/m3 = the lowest cost of clean water with solar power.
- Affordable and reliable, even in remote and off-grid locations.
Robust and Automatic
- Factory-preassembled, plug-and-play system.
- Automatic start/stop and pressure balancing.
- No on-site adjustments required, with fewer maintenance visits.
Technical Specifications
Performance
| Product water flow rate* | 0.8 m³/h (3.5 GPM) |
| Daily capacity (solar day) | 6.4 m³ (1,700 gal) / 8 hours |
| Feed water flow rate | 2.2 m³/h (9.7 GPM) |
| Brine flow rate * | 1.4 m³/h (6.2 GPM) |
| Recovery rate * | 37 % |
| Minimum salt rejection | 99.5 % |
| System pressure | 50 – 57 bar / 725 – 827 psi |
| Operating temperature range | 5 – 45 °C / 41 – 113 °F |
| Energy recovery * | – (standard no ERD) |
| Specific energy * | 5.8 kWh/m³ / 22 kWh/1,000 gal |
* Tested with 36,000 ppm TDS at 25 °C (77 °F) with feed pump. |
Electrical power
| Solar PV input power ** | 8.5 kWp (minimum), 600 – 800 VDC |
| AC input power | 380 – 480 VAC / 50 – 60 Hz / 3x16A breaker |
| Energy consumption | 4.7 kWh |
| ** Exact PV power is always site-specific and depends on factors such as location, weather, equipment level and additional connected power sources. |
Pipe connections
| Feed water inlet | 1″ / DN25 |
| Product water outlet | 3/4″ / DN20 |
| Brine outlet | 3/4″ / DN20 |
Operating Conditions
| Raw water source | Seawater / high salinity borehole |
| Raw water TDS range * | 20,000 – 40,000 ppm |
| Raw water temperature range | 5 – 45 °C |
| Air temperature range | 0 – 45 °C |
| Raw water feed pressure range | 1 – 5 bar |
| * Raw water analysis is required to define appropriate pre-treatment. RO, pre- and post-treatment systems can be customized to suit your application. Feed salinity exceeding 40,000 ppm requires upgraded motor and components rated for higher salinity and pressure. |
Components
| High-pressure pump | Super duplex, axial piston pump (4 kW) |
| Raw water feed pump | Duplex 2205 (0.75 kW) |
| Energy recovery device (ERD) | – (standard no ERD) |
| Pressure vessel configuration | 5 x 4040, FRP composite, single pass |
| RO Membranes | 5 x 4040, LG SW 440 R or equivalent |
| Cartridge pre-filtration | cartridge 20″ 50um, 25um, 3um |
| Multi-Media prefilter | Glass media (standard) |
| Controller | Variable frequency solar drive (5.5 kW) |
| Antiscalant dosing | Dosing pump, 24 VDC, (10 – 240 ml/h) |
| Post-mineralization | Calcite media filter 20″ (standard) |
| Construction materials (wetted parts) | Duplex, SS 316L, PVC-U, FRP |
| Remote monitoring | Cloud-based platform, cellular (standard) |
| Protections | Dry-run, over-pressure, raw water tank low, clean water tank full, solar power low, overload and electrical protections, TDS indicator (product water) |
Mounting specifications
| RO skid unit | Aluminium non-corrosive frame, self-standing |
| Skid unit dimensions | L1,300 x W730 x H1,300 mm |
| Skid unit dry weight (approx.) | 300 kg |
| Container | 8ft ISO, insulated, modified storage container |
| Dimensions | L2,440 x W2,200 x H2,260 mm (standard 8 ft) |
| Dry weight (fully equipped, approx.) | 1,400 kg (includes complete RO system) |
Core features
- Patented ANVS® pressure control
- Non-corrosive materials: Super Duplex, PVC-U
- LORENTZ Global Remote Monitoring
- CIP (clean in place) system
- Dry run and over-pressure protection
- Raw and product water quality indicators (TDS)
- Multi-Media prefilter
- Antiscalant dosing
- Post-mineralization
Technical support
- Installer / operator training available on-site or online
- Remote monitoring and performance diagnostics
- Global partner network and local service support
- Operation and maintenance manual
Mounting options
- Skid-mount
- 8ft RO container with integrated pretreatment and postmineralization
Tested & certified
- ISO 9001, ISO 14001 certified manufacturer
- Factory wet-tested and verified operation
- Conformity test report supplied with the unit
- Standard warranty 12 months
- Extended warranty available upon request
