Water source
Put collected rainwater to work.
Collected rainwater
Connect the system to a suitable water butt or storage tank for washing, showering and general domestic use.
For a dedicated drinking-water supply, add FinalStage RO. Freshwater only.
Rain V2.0
Wall-mounted filtration for washing, showers and a planned rainwater backup supply, with easy-mount keyhole slots and a small accumulator.
Includes: Rain V2.0 with pump, three cartridges, UV-C, pre-strainer and a small accumulator.
Available to pre-order now. Estimated delivery: mid to end of December 2026.
Available to pre-order now. Estimated delivery: mid to end of December 2026.
Offgrid Rain is a wall-mounted unit with easy-mount keyhole slots. It turns collected rainwater into filtered water for washing, showering and everyday domestic use. Mount it close to the water butt or storage tank and run the outlet to your taps. Pumps push better than they pull, so keep the inlet short.
- Includes: brushless pump, three 10-inch cartridges, LED UV-C, pre-strainer and a small accumulator.
- Output: 10–12 L/min at around 35psi (2.4 bar) after filtration, depending on setup and filter condition.
- Power: both 12V DC and mains options included.
- Drinking water: add FinalStage RO. Freshwater only.
LED UV-C is designed to inactivate bacteria, viruses and other microorganisms as water passes through.
Warranty: 2 years for the system; 1 year for pumps. If something goes wrong, get in touch. We supply covered replacement parts and help you fit them. Callouts aren't included.
Everyday use and backup water
Use stored rainwater for daily needs or as part of a planned backup water supply for a suitable home, cabin or outbuilding. It can reduce reliance on mains water and improve household resilience.
For use during a power cut, plan a suitable battery supply for the 12V connection. Collection, water storage, battery and charging equipment are separate. Backup duration depends on stored water and available power.
What’s included & installation
The integrated brushless pump and LED UV-C switch on when water is drawn and switch off when demand stops. The system can be left powered on to supply domestic outlets in a suitable single-storey house, cabin or outbuilding.
Three standard 10-inch filtration stages treat sediment and other contaminants before the water reaches the LED UV-C unit. The powder-coated aluminium frame has integrated keyhole slots for easy wall mounting, 623mm apart centre to centre.
A small accumulator is supplied with the unit. An accumulator connection port is built into the frame.
For drinking water, pair the system with FinalStage RO. The Argonide NanoCeram® Filter Cartridge can also be purchased for Filter C.
The system does not filter saltwater or brackish water.
Water quality varies according to the source, storage conditions, filter configuration and system maintenance. We cannot guarantee a particular output quality in every installation.
Specifications
| Source water | Collected rainwater |
|---|---|
| Output | Filtered water for washing, showering and general domestic use |
| Operation | Automatic, on-demand activation through flow switches in the pump and LED UV-C |
| Installation | Water butt or an existing water system in a suitable single-storey property, cabin or outbuilding |
| Drinking water | Pair with the Offgrid FinalStage RO |
| Power | 12V DC and mains power; both power options included |
| Frame | Powder-coated aluminium |
| Dimensions | approximately W65cm × H37cm × D12cm |
| Mounting | Integrated keyhole slots for easy wall mounting, 623mm apart centre to centre |
| Pump | Brushless pump with automatic flow switch |
| Outlet run | Can push water along up to 15 m and up 1–1.5 m from the unit with suitable pipework; flow depends on the setup and filter condition. |
| Filtered-water flow rate | 10–12 litres per minute, depending on setup and filter condition |
| Post-filter pressure | around 35psi (approximately 2.4 bar) |
| Filters | 3 × standard 10-inch cartridges |
| LED UV-C | Integrated, 50.8 mJ/cm² (supplier-reported) with automatic flow switch (replace every 5-8 yrs) |
| Accumulator | Small accumulator included; integrated connection port |
| Included | Pre-strainer, filter cartridges and a small accumulator |
| Warranty | 2 years for the system; 1 year for pumps |
| Version | V2.0 powder-coated aluminium enclosed frame, brushless pump and integrated keyhole slots for easy wall mounting |
UV-C treatment & documentation
UV-C disinfection
The UV-C LED treatment stage is designed to inactivate microorganisms in clear, pre-filtered water. The supplier reports a UV dose of 50.8 mJ/cm², based on disinfection testing. Performance depends on flow rate and water quality.
Warranty & support
Warranty: 2 years for the system; 1 year for pumps.
If something breaks, let us know. We'll help identify the issue, send you a replacement part where needed and get it resolved as quickly as possible.
At Offgrid Water, we want every customer to have a working system. Happy customers are the best recommendation we can hope for.
Rain V2.0
Sale price£990.00
Inside the system
Get to know your setup.
Hover over a numbered point or select a feature. On a phone, tap to explore.
Hover, tap or use the feature buttons. Where labelled, concealed components are marked on their casing; they are not exposed in this view.
Filters
Three stages before UV-C.
3 × standard 10-inch cartridges
Replaceable cartridges treat the collected water before the integrated LED UV-C stage.
Choose the cartridge configuration for your source. Argonide NanoCeram is available separately for Filter C.
Pump
Water when you open the tap.
10–12 L/min
The integrated brushless pump activates on demand. Listed output is around 35psi after filtration, depending on setup and filter condition.
The pump is concealed in this photo.
UV-C
Treatment that starts with flow.
Integrated LED UV-C
The UV-C stage is designed to inactivate bacteria, viruses and other microorganisms as water passes through.
The UV-C assembly is concealed in this view. Water quality, maintenance and configuration affect performance.
Mounting
A compact wall-mounted supply.
Approx. 65 × 37 × 12cm
The powder-coated aluminium frame has easy-mount keyhole slots 623mm apart, centre to centre.
A small accumulator is included, with an integrated connection port.
Power
Choose the supply that suits you.
12V DC + mains options
Both power options are included. The pump and UV-C operate automatically when water is drawn.
For suitable single-storey installations, cabins and outbuildings.