Sustainable solutions for people, industry and communities
Off-Grid & Solar
Energy Solutions.
Reliable, cost-effective and scalable solar and off-grid energy systems that help keep your operations running.
Off-Grid & Solar
Water solutions for a changing world
Reliable Water Treatment.
Explore treatment approaches shaped around source water, quality requirements and intended use.
Responsible water management
Wastewater
Treatment & Recovery.
Consider treatment, recovery and reuse options that support more responsible water management.
About OTG TEC
Engineering sustainable solutions for a more resource-efficient future.
OTG TEC delivers integrated off-grid energy, water treatment and wastewater solutions to help businesses, industries and communities operate more efficiently and responsibly.
Discover OTG TEC →Our Solutions
Comprehensive solutions tailored to your needs.
Solar Energy Solutions
Off-grid and hybrid solar options for site and operational requirements.
Explore Solar Solutions →
Water Treatment
Treatment systems shaped around source water, quality and intended use.
Explore Water Solutions → OTG TEC WATER SOLUTIONS
Every drop matters.
Make water work smarter.
From treatment to reuse, we help businesses and communities make better use of one of their most valuable resources — with practical, efficient water solutions shaped around the needs of each site.
01Water treatment
02Recovery & reuse
03Site-specific design
Water solutionsDesigned around your requirements
W/01
Industries We Serve
Supporting a wide range of industries.
Industrial & Manufacturing
Agriculture & Agri-Processing
Mining & Construction
Commercial & HospitalityHow We Work
A simple, collaborative process.
01
Assess Your Needs
Understand the site and requirements.
02
Design a Solution
Shape an approach around your priorities.
03
Implement & Integrate
Plan the delivery and integration.
04
Ongoing Support
Discuss optimisation and support needs.
Water independence
From raw water to reliable supply
OTG TEC designs treatment systems for groundwater, surface water and other sources. Systems can be paired with solar energy to support partial or complete off-grid operation, depending on site requirements.
Our small-scale treatment solutions cover approximately 1,000 to 50,000 litres per day, with automation and remote monitoring options to help clients operate with confidence.
Explore water treatment →Wastewater recovery
Recover water. Reduce waste.
Our SaniStation solutions use Sequencing Batch Reactor technology to treat domestic and industrial wastewater for suitable reuse or compliant discharge, subject to site conditions and applicable standards.
Applications may include irrigation and toilet flushing. Automated operation and performance monitoring support dependable day-to-day management.
Explore wastewater solutions →Why OTG TEC
Built for practical, long-term performance
Custom-engineered
Systems designed around your water, energy and operational needs rather than a one-size-fits-all approach.
Integrated technologies
Combine solar generation, water treatment and wastewater recovery where appropriate for the site.
Remote oversight
Automation, diagnostics and optional remote monitoring help identify issues and support consistent operation.
Applications
Designed for demanding environments
From remote properties and agricultural operations to commercial facilities and industrial sites, OTG TEC helps plan essential energy and water services around the realities of each location.
See industries we serve →Reliable engineering takes many forms
Our combined experience. Your unique requirements.
At OTG TEC, we work to fulfil each client's unique needs with custom-built products, carefully designed by our team to deliver quality, self-reliance and peace of mind.
Our range of tried-and-tested technologies spans solar power systems, water treatment products and wastewater recovery. We bring these capabilities together where a project calls for a more integrated approach to essential utilities.
Our aim is to make the services people rely on every day work reliably in the background: when a client turns on a light, opens a tap or flushes a toilet, the system should simply do its job.
Learn more about OTG TEC →Water treatment capabilities
Water solutions for a range of sources and applications.
OTG TEC's small-scale water treatment systems are designed for capacities of approximately 1,000 to 50,000 litres per day. Systems can be coupled with solar power to support partial or complete off-grid operation, depending on the project.
Groundwater
Treatment options for groundwater sources, assessed against incoming water quality and intended application.
Surface water
Systems designed around source-water conditions and the quality requirements of the final supply.
Wastewater and seawater
Appropriate treatment processes can be considered for wastewater and seawater applications following a project assessment.
SaniStation wastewater technology
Recover and reuse wastewater.
OTG TEC's SaniStations use Sequencing Batch Reactor (SBR) technology to treat domestic and industrial wastewater for suitable reuse, including irrigation and toilet flushing, or for discharge where applicable requirements are met.
The process also manages the activated sludge generated during treatment. Suitability and performance depend on wastewater characteristics, plant design and site conditions.
Discover SaniStation solutions →Automation and ongoing oversight
Systems designed to be monitored.
OTG TEC systems are designed with automation at their core. Where required, systems can be controlled and monitored remotely by the client or by OTG TEC.
For plants under OTG TEC's care, the company describes daily monitoring, monthly and exception performance reports, and diagnostic alerts that notify its engineers of faults requiring attention.
This approach supports visibility of plant performance and helps the team respond when operational issues arise.
Discuss monitoring and support →The team
Meet the people behind OTG TEC.
A team bringing project coordination, accounts and sales support together to help clients explore their energy and water requirements.
David Viljoen
Project Manager
Project coordination and delivery.
Robyn Viljoen
Accounts
Accounts and administration.
Simon van der Ploeg
Sales Advisor
Sales enquiries and solution discussions.
Let's work together
All of our customers' success matters to us.
Get in touch with OTG TEC and tell us what you need to achieve. Whether your priority is energy resilience, a dependable water supply or wastewater treatment, our team can start by understanding your site and requirements.
Tell us a little about your project. Our team will use your details to respond to your enquiry.
START A CONVERSATION
How can we help?
Complete the form and we'll be in touch.
Frequently asked questions
Questions we often hear
Can solar and water treatment work together?
Yes. OTG TEC can assess integrated systems for partial or complete off-grid operation depending on energy demand, water source and location.
Can treatment systems be monitored remotely?
Selected automated systems support remote control, diagnostics and ongoing performance monitoring.
How do we start a project?
Contact us with your location, current infrastructure, approximate demand and key challenges. We can discuss an appropriate assessment and solution.
Ready to discuss your project?
Talk to our team about sustainable energy, water treatment and wastewater recovery.