Answer 8 plain-English questions and get a recommended system guide — battery, solar, inverter, charger — tailored to your rig. Used by caravan auto electrician Brisbane customers before every install at our Burpengary workshop. Free, honest, no sales pressure.
This helps us tailor the right system guide from the start.
Please select your rig type to continue.
This makes a big difference to your battery sizing.
Please select your fridge type.
Tick everything you want powered from your battery.
Please select at least one item.
Things that normally plug into a standard power point.
Which 240V Items?
Tick what you need — we'll assign the right inverter automatically.
Please select yes or no to continue.
Be honest — we'd rather build for your real use than oversell you.
Please select your typical off-grid duration.
Pick everything that interests you — we'll spec the right combination.
Please answer all three recharging questions.
From basic readouts to full smart control — your preference.
Please select your monitor preference.
Your recommended system guide appears on screen immediately. We'll also follow up within 24 hours.
Please fill in your name, mobile, and email.
Every system is different — your travel style, appliances, and rig all play a role. As a guide, smaller entry-level systems start from around $5,000. Mid-range builds typically sit between $10,000–$15,000. Larger full-featured systems range from $15,000–$25,000. Most customers wanting to run 240V appliances comfortably off-grid invest around the $15,000 mark. Complete the guide above for a recommended spec, then get a personalised written quote from our team.
For a caravan with a 12V compressor fridge, 200Ah lithium is the minimum. Running an air conditioner for 4–6 hours per day on a week-long trip requires 400Ah minimum. Full-time travel with aircon needs 600Ah or more. The guide above calculates the right size based on your specific appliances and travel style.
A general rule: solar wattage should be roughly double your battery capacity in Ah. A 200Ah battery needs approximately 400W of solar for healthy daily recharge. A 400Ah battery needs 800W minimum. Camper trailers typically use portable solar blankets rather than fixed roof panels — the guide factors this in automatically.
A DC-DC charger charges your caravan or 4WD battery from your vehicle's alternator while you drive. It's essential for lithium battery systems — alternators can't charge lithium directly without one. The Redarc 40A Core BCDC is our standard recommendation for most builds. It also handles portable solar input, saving the cost of a separate solar regulator.
Yes. Ozzy Auto Electrics in Burpengary is an authorised installer of Victron Energy and Redarc products. We install Victron inverters, MPPT solar regulators, battery monitors, and Cerbo GX systems, plus Redarc BCDC chargers. All installs carry full manufacturer warranties — Victron 5 years, Redarc 2 years — plus our own ongoing workmanship warranty.
Yes. We offer mobile auto electrician service across Brisbane, Moreton Bay, Burpengary, Caboolture, North Lakes, and the Sunshine Coast. We can come to you for lithium battery upgrades, solar installations, DC-DC charger fitment, and inverter installations.
Don't take our word for it.
"Alex and the team took on a monumental task — full Troopy fitout on short notice — and finished on time. Excellent quality, attention to detail, communicated thoroughly throughout."
Billy PeakeLandCruiser Troopy Build"Striving for ultimate customer satisfaction, expert problem solvers and absolute professionals. Would highly recommend their expertise to anyone needing solar or batteries."
Tim ReesCaravan Lithium & Solar"Professional, helpful and friendly. Very transparent in their dealings — rang and advised on what was required and the cost. 100% would recommend."
Bryan LoweCaravan Electrical