Custom Off Grid Power Systems, Warwick & Toowoomba
From a weekend-ready 100Ah lithium setup through to full-time off-grid systems with Cerbo GX monitoring and large solar capacity, we design and install complete power systems sized around how you actually travel. Not from a catalogue.
Ideal for reliable off-grid power and extended touring.
What's Included in Your Off-Grid System
Every off-grid system is engineered from your actual power requirements. Genuine Victron components, correct wiring, no catalogue packages.
Full System Design
Each system is built around your real power needs: what you run, how long you run it, and how you recharge on the road. Every component is sized to your setup. You get a full design with itemised components before any work starts.
Lithium Battery Bank
100Ah to 1000Ah lithium iron phosphate (LiFePO4) battery banks in 12V & 24V configurations. Lighter than AGM, deeper usable discharge (80–100% vs 50% for AGM), 3,000–5,000 cycle lifespan, and charges significantly faster. The correct choice for serious off-grid and full-time travel.
Victron Inverter/Charger
Victron MultiPlus or MultiPlus-II for clean 240V power from your 12V & 24V battery bank. True sine wave output, safe for laptops, CPAP machines, induction cooktops, and sensitive electronics. Also charges the battery bank from 240V shore power when available.
MPPT Solar Regulator
Victron SmartSolar MPPT controller. Extracts maximum power from your solar panels at all times, regardless of battery state. Bluetooth monitoring via the VictronConnect app. Works with 12V, 24V, and 48V solar arrays depending on your system configuration.
DC-DC Charger (Alternator)
REDARC or Victron Orion DC-DC charger. Charges the lithium battery bank from your vehicle's alternator while you drive. Unlike a basic VSR relay, a DC-DC charger provides the multi-stage charge profile that lithium batteries require and handles smart alternators found in modern vehicles.
Battery Management System
A BMS (Battery Management System) protects the lithium bank from overcharge, over-discharge, short circuit, and temperature extremes. It also keeps cells balanced across the bank so capacity is maximised over the life of the battery. Every lithium install includes a BMS matched to the battery bank.
Distribution & Fusing
Victron SmartShunt, sized busbar, and individual fusing on every circuit throughout the system. Every cable run is sized to handle the full load it's expected to carry. Every fuse is rated and positioned within 300mm of the battery. Every connection is labelled and accessible for future troubleshooting.
System Monitoring
Victron Cerbo GX or REDARC Manager30 for full system visibility: battery state of charge, solar input, load draw, and charging source, on your phone, tablet, or a dedicated display. Know exactly what your system is doing at all times. The Victron VRM portal also lets you review historical data remotely.
Why We Use Victron MPPT Controllers
Victron Energy is the industry standard for off-grid power management. Dutch-engineered and manufactured to the highest tolerance, Victron products are used in superyachts, telecom towers, remote scientific stations, and emergency backup systems, environments where failure is not an option. The MultiPlus and MultiPlus-II inverter/charger, SmartSolar MPPT controller, SmartShunt battery monitor, and Cerbo GX communication hub work together as a complete, integrated ecosystem rather than a collection of compatible-but-separate products. When every component speaks the same language, the system can prioritise charging sources intelligently, protect the battery from every angle, and give you complete visibility of every watt flowing in or out.
As a Victron authorised installer, Nathan supplies the full Victron range and installs to Victron's installation standards. Systems are commissioned via the VRM portal so you can monitor performance remotely from your phone at any time. Victron's product warranty is among the strongest in the industry, and their support network is genuinely accessible if you ever need it years down the track.
Every Install is AS/NZS 3001.2 Compliant
We follow all relevant Australian Standards on every install. Every job, every time.
Based in Warwick, We Travel
Based in Warwick, we travel across Southeast Queensland for off-grid power system builds. Mobile service available. We come to you.
Off Grid Power System FAQ
Honest answers to the questions we get asked before every job.
Off-grid systems vary depending on your power requirements and how long you need to run self-sufficient. Get in touch and Nathan will work through your exact needs and provide a tailored quote.
What Our Customers Say
Nathan installed 2 x 12 volts systems, one in our Motorhome and one in the trailer. Not only is the system fantastic and we never have to worry about our power, but he also fixed faults we had with our old system. The batteries have 7 years warranty, the upgrade to our panels keep the batteries topped up which really helps on cloudy and rainy days. We recommend Nathan to everyone, and he is so easy to deal with.
Jenni & Steve K
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10/10 for everything! Nathan drove to woop woop to install our bushman fridge, new battery system & fans. Last week in 42 degrees our fridge was lovely and cold and the fans were a godsend! We will use Coast Custom 12 Volt for anything we need in our offgrid set up!
Glynis C
✓ VERIFIED GOOGLE REVIEW
Nathan is a wonderful source of knowledge and Ideas. There is no pressure and helped Improve the efficiency of our stock caravans solar charging system. Work and components are 1st class. He is happy to do the smallest job at a sensible price. It's a relief to have a 5 star technician serviceing the Warwick and Toowoomba regions.
John M
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