Tradie Ute and Van Electrics in Melbourne

This guide is for Melbourne tradies who use a ute or van as a mobile workshop. It covers powering tools and chargers from an inverter, keeping a second battery charged on stop-start city days, and fitting work lights, light bars and beacons in a way that stays safe and within Victorian rules.

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The Melbourne tradie's working day

A typical Melbourne trade day is hard on a vehicle's electrics. You might start at a supplier in Campbellfield or Bayswater, crawl across the city on the Ring Road or the Monash, then spend the day parked on a building site in the growth suburbs with tool batteries charging in the back. Plenty of the driving is short hops between jobs, and plenty of the day is spent with the engine off.

That pattern means the electrical system has to supply a lot of power with limited time to recharge. Get the setup right and the ute or van becomes a dependable workshop. Get it wrong and you'll have a flat starting battery on site at 3 pm with a half-charged drill.

Choosing an inverter for tools and chargers

An inverter turns 12V DC from the battery into 240V AC so you can run chargers, small tools and laptops. Size it for the biggest load you'll run at once, then add a margin. Power tools with motors draw a surge when they start, often well above their rated wattage, so check the inverter's surge rating too.

Pure sine wave inverters produce power much closer to mains power. They're the safer choice for tool battery chargers, laptops and anything with electronics. Cheaper modified sine wave units can make some chargers run hot or fail.

The 12V side is where many installs go wrong. A 2,000 W inverter at full load can draw well over 150 A from the battery. That needs heavy cable kept as short as possible, a fuse or circuit breaker close to the battery, and solid connections. Our guide on choosing and installing an inverter covers sizing and cable.

Use the inverter's own outlets, or a portable lead plugged into them. Hard-wiring an inverter into fixed 240V outlets or wiring in a van is work for a licensed electrician. Many tradies use an inverter with built-in residual current protection, and it's worth asking about that when you buy.

A second battery so you can still start

Running an inverter, fridge or lights off the starting battery is the quickest way to get stranded. A dual battery system adds a separate auxiliary battery for your work loads, so the starting battery is kept for starting the engine. Our guide on how a dual battery system works explains the layouts.

Most late-model utes and vans have smart alternators that vary their output, and short city trips give little charging time anyway. A DC-DC charger charges the auxiliary battery properly in that situation, and many accept solar input from a panel on the roof or canopy, which helps on days the vehicle sits on site. Read DC-DC charger or isolator before you choose.

Lithium auxiliary batteries are popular in trade vehicles because they're lighter and handle deep discharge well. They need a charger with the right lithium profile, and the battery should be mounted securely and protected from heat and impact.

Work lights and lighting the load area

LED work lights on a canopy, tray or rear door make early starts and winter afternoons much easier. Wire them through a relay and switch, with their own fuse close to the power source. See how to wire a 12V relay and where to put the fuse.

Work lights are for working, not driving. Bright white lights shining backwards or sideways can dazzle other road users, so switch them off before you move. A dash indicator or a switch with a built-in light helps you remember.

Light bars and driving lights: the rules to respect

LED light bars are popular on tradie utes, but on the road they count as driving lights, and driving lights are high beam. The Victorian Road Safety Road Rules 2017 say you must not use high beam within 200 metres of an oncoming vehicle, or when you're following within 200 metres of another vehicle. In practice, a light bar has almost no legal use on Melbourne's lit suburban streets.

Vehicle standards also cover how driving lights are fitted. They're generally required to be wired so they only work with high beam and switch off when you dip your headlights. Mounting position, the number of lights and whether a bar blocks the number plate or airflow can all matter. Fog lights must only be used in fog or other hazardous weather, not as extra headlights.

Rules can change and details vary between vehicle types, so check the current VicRoads requirements before you fit a light bar, and have it wired properly through a relay and the high beam circuit.

Beacons and flashing warning lights

Amber rotating or flashing beacons are common on site vehicles, but on Victorian roads they're regulated. VicRoads' Vehicle Standards Information sheet VSI 12 says special use vehicles, such as tow trucks, breakdown service vehicles and vehicles doing hazardous road work, may routinely be fitted with yellow warning lamps. Other vehicles need VicRoads approval to fit them. Red and blue lights are reserved for emergency vehicles.

The same sheet says the lamps may generally only be lit while the vehicle is stationary, with exceptions such as road maintenance work involving frequent stops, wide loads and escort vehicles. At least one lamp must be visible from 200 metres in daylight, and the driver mustn't be able to see the lens from the seat. A beacon on a vehicle used only inside a private yard or site is a matter for that site's safety rules, and many Melbourne sites require one. If you do fit one, wire it on its own fused, switched circuit, and check the current rules with VicRoads first.

Tidy, protected wiring for a work vehicle

Trade vehicles get loaded, unloaded and bounced over site tracks every day. Wiring has to survive that.

• Run cables in split conduit and secure them every 300 mm or so.
• Use grommets wherever cable passes through metal, especially into canopies and trays.
• Fuse every circuit close to its power source.
• Keep the auxiliary battery and inverter away from tools and materials that could crush or short them.
• Label switches and circuits so anyone driving the vehicle knows what each one does.

Getting it fitted

A tidy, documented install is quicker to service and easier to explain to your insurer. If you're kitting out a new ute or van, auto electricians around the trade suppliers in Campbellfield and Bayswater see plenty of this work.

Parts for this job

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Get it done: get a quoteDo it yourself: shop pure sine wave inverters

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Get it done: get a quoteDo it yourself: shop LED work lights

Get it done: get a quoteDo it yourself: shop amber beacons

Questions Melbourne drivers ask

What size inverter do I need to charge tool batteries in my ute?

Add up the wattage of the chargers you'll run at the same time, then allow a margin. Tool battery chargers are often a few hundred watts each, so a quality pure sine wave inverter of 1,000 to 1,500 W covers many setups. Check each charger's label, and remember the 12V cable and fuse must suit the inverter's full current draw.

Can I use my light bar around Melbourne?

Rarely. A light bar counts as a driving light, which is high beam. Victorian road rules say you can't use high beam within 200 metres of an oncoming vehicle or one you're following, which rules it out on most suburban roads. It should be wired so it only works with high beam. Check current VicRoads requirements before fitting one.

Am I allowed to fit an amber beacon to my ute in Victoria?

Only if your vehicle qualifies or you get approval. VicRoads lets special use vehicles, such as tow trucks, breakdown vehicles and hazardous road works vehicles, carry yellow warning lamps, and other vehicles need VicRoads approval. On the road they can generally only be lit while you're stopped. A beacon used only inside a private work site is covered by that site's rules.

Why does my ute's starting battery go flat when I run the inverter?

Because the inverter is drawing straight from the starting battery, which isn't designed for deep discharge. A dual battery setup with a DC-DC charger keeps work loads on an auxiliary battery and protects the starting battery. A low voltage cut-off on the inverter also helps. Have the battery tested too, since repeated flattening shortens its life.

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