Off-grid solar systems, engineered for Queensland
From weekender cabins to working farms — Selectronic SP PRO, Victron and Sol-Ark inverters paired with lithium battery banks built to live without the grid. 240+ systems installed from Stanthorpe to Cooktown.
3 system tiers, every one custom-engineered
We don't sell kits. Every system is sized from your actual hourly load profile, your site shading, and how many cloudy days you want to ride out. These are the bands we build into most commonly.
Weekender
Cabins, sheds, small off-grid homes used 2–3 days/week.
- Solar
- 6–10 kW
- Battery
- 15–20 kWh lithium
- Inverter
- Victron MultiPlus-II
Full-Time Home
Permanent rural residence with aircon, electric cooking, water pumps.
- Solar
- 12–18 kW
- Battery
- 30–45 kWh lithium
- Inverter
- Selectronic SP PRO
Farm & Workshop
Working properties — bore pumps, welders, cool rooms, machinery sheds.
- Solar
- 25–40 kW
- Battery
- 60–80 kWh lithium
- Inverter
- Sol-Ark 15K (three-phase)
What goes into a serious off-grid system
Off-grid is not 'solar + a battery'. It's a complete engineered power station with redundancy at every layer. Here's the kit list.
Tier-1 panels
Longi or Trina N-type bifacial, 25-year output warranty. Ground-mount or rooftop.
Hybrid inverters
Selectronic SP PRO (AU-made, 10yr), Victron MultiPlus-II, or Sol-Ark for three-phase loads.
Lithium battery bank
Pylontech, BYD HV, or PowerPlus Eco — scalable from 15kWh to 80kWh+, 6,000+ cycles.
Backup genset
Auto-start diesel (Kubota / Pramac) or LPG generator wired into the inverter for 5–7 cloudy days.
Remote monitoring
VRM portal or Selectronic Select.live — we watch your system 24/7 from Brisbane.
Switchboard & wiring
AS/NZS 5139 compliant DC + AC switchboards, surge protection, lightning earthing.
When off-grid makes financial sense
Grid quote shock
Ergon will quote $80k–$300k+ to extend power lines >1km. An off-grid system is almost always cheaper.
Outage-prone areas
Cyclones, storms and bushfires take rural feeders down for days. Off-grid means you never lose power.
Done with generators
Diesel costs $4,000–$10,000/yr to run a remote home. Solar + battery pays back in 3–5 years.
New rural builds
Avoid the connection fee entirely. Design solar in from day one and skip the meter board.
Our 5-step off-grid process
Free site assessment
We visit anywhere in QLD. Measure daily kWh load, shading, soil for ground-mounts, generator location.
Load audit & design
Every appliance modelled hour-by-hour across summer + winter. Sized for 5 days of autonomy minimum.
Fixed-price proposal
Single-line diagram, component spec sheets, civil works, gen-set integration, monitoring — all itemised.
Installation & commissioning
Our crew travels statewide. 3–7 days on-site depending on civil works. Full handover walkthrough.
Ongoing remote support
We monitor every system from Brisbane. Most issues are fixed remotely before you notice them.
Off-grid solar FAQ
Build your own power station
Free site assessment anywhere in Queensland. Fixed-price engineered proposal. 10-year system warranty backed by a Brisbane head office that answers the phone.