Wind Turbine FAQs

  • Summary Checklist for Your Choice

    Choose the SR or ST-1200W if you want portability, low noise, and minimal investment for camping or caravans.

    Choose the ST-2000, ST-3000, or ST-5000 if you have a stationary house/cabin and want to supplement solar panels at night.

    Choose the ST-10kW — the largest turbine we sell — if you have heavy agricultural power needs, acreage, and a budget for proper mast engineering.

    The vertical axis wind turbines listed on the BushLine Outdoor Equipment catalogue are categorised by physical design shapes, which dictate their ideal applications.

  • No.Wind turbines generate "wild" 3-phase AC power that changes voltage constantly with the wind speed. Connecting it directly to a battery or a standard solar inverter will instantly destroy your equipment. Youmustwire the turbine into a dedicatedWind/Solar Hybrid MPPT Controller with an integrated Dump Load Resistor. The controller converts the power to stable DC to charge your batteries safely.

  • You must match the turbine and its hybrid controller to the exact voltage of your existing battery bank:

    • 12V: Best for compact mobile setups like caravans, 4WDs, and camper trailers.
    • 24V: Great for medium-sized setups like off-grid sheds, cabins, and motorhomes.
    • 48V: The gold standard for full off-grid home systems. Higher voltage means less energy loss through your wires and allows you to use thinner, safer cables.

  • When your battery bank becomes 100% fully charged, it stops accepting power. If a heavy wind storm hits at night when your batteries are full, a turbine with nowhere to send its power will "free-spin" out of control and physically fly apart. A hybrid controller fixes this by automatically diverting that excess power into the dump load resistor, which burns it off safely as heat and acts as an electronic brake to slow the turbine down.

  • No,that is the main benefit of the vertical design. Traditional horizontal "propeller" turbines create a high-pitched, annoying "chopping" noise. Our ST Tulip and Flower series utilise advanced omnidirectional maglev-style bearings, making them virtually silent and completely vibration-free, all you will hear is the wind. They are perfect for suburban blocks, tight caravan parks, and areas close to neighbours.

  • It will turn, but turning is not charging. The blades start rotating at about 1.5 m/s — a light breeze. Charging starts once the wind clears the cut-in speed of about 3.5 m/s, and output climbs from there — the rated figure is measured at 13 m/s (about 47 km/h). A gentle breeze keeps the turbine ticking over; it takes real wind to push real power into your batteries.

  • You should connect the wind turbine to a battery bank first, via a dedicated charge controller, rather than directly to an inverter. Connecting a wind turbine directly to a standard inverter will damage the equipment or cause the system to fail.

    🔋 The Correct Wiring SequenceTo safely capture and use the power, your setup must follow this exact order:

    1. Wind Turbine: Generates wild, fluctuating 3-phase AC power as wind speeds change.
    2. Hybrid/Wind Charge Controller: Converts the unstable AC power into steady DC power. It also protects the turbine from over-speeding by applying an electronic brake during high winds.
    3. Battery Bank (12V/24V/48V): Acts as a buffer to store the energy. It absorbs sudden power spikes from wind gusts and provides a steady source of energy.
    4. Off-Grid Inverter: Connects to the battery, converting the stored DC battery power into standard AC power for your household appliances.

    ⚠️ Why You Cannot Skip the Battery

    • Unstable Voltage: Wind speeds change second by second. Without a battery to absorb and smooth out these massive fluctuations, a direct-connect inverter would constantly turn off and error out.
    • Turbine Destruction: When a battery is full or disconnected, a wind turbine loses its "load" (resistance). Without that resistance, the blades can spin out of control in high winds and physically destroy the unit. The charge controller uses the battery connection to safely dump excess power and slow the turbine down.

  • Wiring & Installation Requirement:This wind turbine generates 3-phase AC power andcannotbe connected directly to a battery, solar controller, or home inverter. To operate safely, it must run through a dedicatedWind/Solar Hybrid MPPT Controller with an integrated Dump Load Resistor. The dump load prevents the turbine from over-speeding and destroying itself in high winds once your batteries are fully charged.

  • It is almost always one of three common installation issues. Check them in order:

    1. Your multimeter is set to DC (the most common mistake).

    • The issue: measuring the three turbine wires with the meter set to DC volts.
    • The reality: wind turbines generate 3-phase AC power directly from the stator.
    • The fix: switch your multimeter to AC volts (V~). Testing these wires on a DC setting gives a false reading near zero.

    2. The turbine is stalling because of a short.

    • The issue: the blades turn heavily and slowly, or lock up.
    • The reality: if any of the three AC output wires touch each other, or the controller’s internal braking diodes have short-circuited, it acts as a magnetic brake — the turbine can never spin fast enough to build voltage.
    • The fix: completely disconnect the turbine from the controller. If it suddenly frees up and spins much faster, the problem is a short in the wiring or a faulty controller.

    3. Voltage drop from thin cables.

    • The issue: thin wire run a long way from the tower to the battery shed.
    • The reality: thin solar or automotive cable over a long run (20 metres or more) loses the power as heat in the wire before it reaches the controller.
    • The fix: use heavy cable between the mast and the controller on long runs — minimum 8 AWG, ideally 6 AWG.

  • Because the number on the box is a peak rating, not a promise. A turbine’s rated output is measured at a specific wind speed — for these models that is 13 m/s, about 47 km/h — and most sites see far less most of the time. Your display shows what the wind is delivering right now, so it will sit well below the rated figure and move second by second with the wind. That is physics, not a fault.

    Where these turbines earn their keep is time: they keep charging through the night and through weather that shuts solar down. If the display shows 0 W while the blades are spinning, that is a different issue — see the 0 W question below.

  • Not necessarily — this is one of the most common questions we get, and it's rarely a faulty unit. It's usually a quick settings check, or (on a first-time install) how the wiring and start-up sequence were done. See our full Wind Turbine 0W Troubleshooting & Installation Guide for the complete walkthrough, or contact us and we'll help you sort it out.

  • Short answer: wire your bus bar and breakers before and after the controller, then power up in the right order — battery first, then solar, then wind. Getting the sequence right prevents almost all wiring issues, including the common “spinning but 0 W” problem.

    Correct installation comes down to isolation and the right sequence:

    • Fit a breaker before the controller (turbine/solar side) and after it (battery side), landing on a DC bus bar
    • Keep the turbine-to-controller cable run to 2–10 metres to limit voltage drop
    • Power up in this order: battery breaker first, then solar, then wind turbine last

    See our full How to Install & Start Up guide for the complete step-by-step walkthrough and wiring diagram.

1 12

Pure Sine Wave Inverter 3000W 4000W 5000W Peak - 12V or 24V

$499.95 AUD
Watts
Input Voltage

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The number on the lid is not the number it runs

You buy the 5000W, wire it to the bank, plug in a 2400W kettle and the thing shuts down. Nothing is broken. 5000W is the surge figure. The continuous rating is printed on the same label, on the line directly below it, and it says 2500W.

That is the whole story on this inverter and it is worth getting straight before you spend anything. RDDSPON print both numbers themselves: the 3000W runs 1500W continuous, the 4000W runs 2000W, the 5000W runs 2500W. Halve the model name and you have the figure to size your gear against.

Get it wrong and the shutdown does not happen in the driveway while you are watching. It happens at two in the morning with a full chest freezer on it, or halfway through a cut with the grinder winding down in your hand. Size off the continuous figure and the thing just works.

What It Does
  • Turns a battery into mains: takes 12V or 24V DC from your bank and puts out 220V AC through two universal sockets.
  • Runs 1500W to 2500W all day: continuous output depends on the model you pick — 1500W, 2000W or 2500W.
  • Handles the start-up spike: the 3000W, 4000W and 5000W headline figures are the surge the unit will take when a motor or compressor kicks in.
  • Gives you a clean waveform: the label says pure sine wave and prints the waveform beside it, which is what fridges, tools with electronics and chargers want to see.
  • Tells you what is happening: the multifunction LCD reads DC input volts, AC output volts, watts drawn and frequency, all on one screen.
  • Sits in a camp or a shed: 1.8kg to 2.65kg with mounting flanges each end, so it bolts down rather than sliding about the tray.
Key Features
  • Continuous ratings on the label: 1500W, 2000W and 2500W, printed by the manufacturer under the model name rather than buried in a datasheet.
  • Two universal outlets: the socket pattern takes Australian and New Zealand angled pins, plus round and flat pin plugs.
  • Screw post DC terminals: a red positive and a black negative post, so you land a proper lug rather than a spring clip.
  • Leads and clamps included: DC leads and two battery post clamps come in the box. The 5000W ships with two pairs of leads, the 3000W and 4000W with one.
  • Fan cooling, sized to model: one fan on the 3000W, two 12V fans on the 4000W and 5000W, drawing through a finned aluminium case.
  • Power and fault lights: the 4000W and 5000W front panels carry a green power lamp and a red fault lamp beside the rocker switch.
  • Built for one bank voltage: each unit is made as a 12V or a 24V inverter. It is a build option, not a switch on the case, so you choose it at checkout.
  • Compact for the output: the largest of the three is 314mm long and weighs 2.65kg.
Where It Stops
  • It is not a 5kW inverter: the biggest one runs 2500W continuously. If you need 5000W all day, this is the wrong unit and no wiring trick changes that.
  • A 24V unit on a 12V bank is a brick: and a 12V unit on 24V is worse. Pick the input voltage that matches the bank you already have.
  • It does not charge anything: an inverter only takes power out of a battery. Something else has to put it back in.
  • Not for fixed wiring: do not connect it to the power points of a house, shed or caravan. Wiring an inverter into fixed circuits is licensed electrical work in Australia and New Zealand. Plug appliances straight into the sockets on the front.
  • No Australian compliance mark: the label carries a CE mark and recycling marks. There is no RCM mark on it, which is the Australian and New Zealand one, and we have not sighted a test certificate for any mark.
  • Keep it dry and clear: it is a vented, fan-cooled aluminium case with open fins. It is not sealed against water or dust, and blocking the fans will cook it.
What Else You'll Need

An inverter is half a system. It empties the bank; it never fills it. This is the gear that goes around it, and why each piece earns its place:

Q & A

So is the 5000W a 5000W inverter or a 2500W one?

A 2500W one, with 5000W of surge headroom. The manufacturer prints both figures on the case: "INVERTER 5000W" in large type, and "Continuous Output Power: 2500W" on the line below it. Size every calculation you do off 2500W. The 5000W number only matters for the half-second when a compressor or a power tool starts up. The supplier does not state how long the unit will hold the surge figure, so we cannot tell you either.

Will the biggest one run a 2400W kettle?

It is right on the line, and we would not build a camp around it. 2400W against a 2500W continuous rating leaves you 100W of margin before the inverter has had a hot day, a long cable or a bank sitting at the low end of its voltage. A kettle is one of the harshest things you can ask an inverter to do because it pulls its full load the entire time it is on.

Can I run the 24V version off a 12V battery?

No. Each unit is built for one bank voltage and it is not switchable — the label has a tick box for 12V or 24V and the factory ticks one. A 24V inverter on a 12V bank will not work, and a 12V inverter on a 24V bank is a good way to destroy it. Check what your bank actually is before you choose the variant, because it is the one decision on this page you cannot undo later.

Is the output 220V or 240V?

The supplier's specification panel says 220V nominal, and so does the label. Australian and New Zealand mains sits at 230V nominal, and most gear sold here is marked 220–240V on its rating plate, which covers it. If you are running something with a narrow input range, read its rating plate and check 220V falls inside it. The displays in the manufacturer's own photographs read between 223V and 239V under load.

What size cable and fuse does it need?

Bigger than most people expect, and we are not going to guess it for you. The supplier does not publish the DC input current at full load, and that figure is what decides your cable size and your fuse rating. Working a 2500W load out of a 12V bank pulls hundreds of amps on the DC side, which is a different class of wiring from anything on the AC side of the unit. Size the cable and the fuse from the real measured draw, keep the run short, and if you are not confident doing that, have an auto electrician do it.

Can I wire it into the caravan's power points?

No. Plug your appliances directly into the two sockets on the front. Connecting an inverter to the fixed wiring of a van, shed or house is licensed electrical work here, and back-feeding a circuit is how people get hurt.

Is it really a pure sine wave unit?

The manufacturer says so and prints a sine waveform on the case beside the words "Pure Sine Wave". We have not put one on an oscilloscope ourselves, so that is the manufacturer's statement rather than our measurement. It matters because a modified sine wave sold as pure sine will make induction motors run hot and can upset sensitive chargers and electronics.

Specs

Specification Detail
Brand RDDSPON
Models 3000W, 4000W, 5000W (these are the peak figures)
Continuous output power 1500W / 2000W / 2500W — printed on the product label
Peak output power 3000W / 4000W / 5000W
Peak duration Not specified by supplier
Output waveform Pure sine wave (stated and illustrated on the label)
DC input voltage 12V or 24V — built as one or the other, not switchable
DC input voltage range Not specified by supplier
DC input current at full load Not specified by supplier
AC output voltage 220V nominal
Output frequency Label lists 50Hz and 60Hz with neither box ticked. Every display in the supplier's photographs reads 50Hz
AC outlets 2 × universal multi-fit sockets
Display Multifunction LCD — DC volts, AC volts, watts, frequency
Indicators Green power lamp and red fault lamp (shown on the 4000W and 5000W panels)
Switch Rocker switch marked ON / OFF
Cooling 1 fan (3000W); 2 × 12V fans (4000W and 5000W)
Conversion efficiency Not specified by supplier
No-load current draw Not specified by supplier
Low-voltage cutoff and restart Not specified by supplier
Protection functions Not specified by supplier — a fault lamp is fitted, but the supplier does not state what triggers it
DC terminals Red positive and black negative screw posts. Stud size not specified by supplier
Case Finned aluminium with mounting flanges each end
Dimensions (spec panel) 3000W 292 × 130 × 70mm / 4000W 268 × 150 × 72mm / 5000W 314 × 150 × 72mm
Overall length (drawing) 292mm / 282mm / 330mm — the supplier's dimensioned drawing is 14–16mm longer than its own table on the two larger models. Allow the larger figure when you plan a mounting space
Net weight 1.8kg / 2.2kg / 2.65kg
Supplied with DC leads and 2 battery post clamps. Two pairs of leads on the 5000W, one pair on the 3000W and 4000W
Markings CE and recycling marks on the label. No RCM mark. No test certificate sighted

Watch Me

No video on this one yet

We would rather put up nothing than a supplier's stock reel of a different inverter. When we get one on a bench with a bank and a load on it, it goes here.

In the meantime, the two things worth reading before it arrives:

  • Sizing the bank behind it: an inverter is only as good as what is feeding it. The charge controller range covers what puts the charge back in.
  • Turbine spinning but showing 0W: the most common call we get on an off-grid system, and it is almost never a dud unit. The 0W troubleshooting guide walks through it.

Still stuck? Ring 0400 333 898. A real person picks up, and if we do not know the answer we will say so.

Free delivery to Australia and New Zealand. Allow 10–14 days from the day you order, and up to 3 weeks to regional and remote addresses.

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Wind Turbine FAQs

  • Summary Checklist for Your Choice

    Choose the SR or ST-1200W if you want portability, low noise, and minimal investment for camping or caravans.

    Choose the ST-2000, ST-3000, or ST-5000 if you have a stationary house/cabin and want to supplement solar panels at night.

    Choose the ST-10kW — the largest turbine we sell — if you have heavy agricultural power needs, acreage, and a budget for proper mast engineering.

    The vertical axis wind turbines listed on the BushLine Outdoor Equipment catalogue are categorised by physical design shapes, which dictate their ideal applications.

  • No.Wind turbines generate "wild" 3-phase AC power that changes voltage constantly with the wind speed. Connecting it directly to a battery or a standard solar inverter will instantly destroy your equipment. Youmustwire the turbine into a dedicatedWind/Solar Hybrid MPPT Controller with an integrated Dump Load Resistor. The controller converts the power to stable DC to charge your batteries safely.

  • You must match the turbine and its hybrid controller to the exact voltage of your existing battery bank:

    • 12V: Best for compact mobile setups like caravans, 4WDs, and camper trailers.
    • 24V: Great for medium-sized setups like off-grid sheds, cabins, and motorhomes.
    • 48V: The gold standard for full off-grid home systems. Higher voltage means less energy loss through your wires and allows you to use thinner, safer cables.

  • When your battery bank becomes 100% fully charged, it stops accepting power. If a heavy wind storm hits at night when your batteries are full, a turbine with nowhere to send its power will "free-spin" out of control and physically fly apart. A hybrid controller fixes this by automatically diverting that excess power into the dump load resistor, which burns it off safely as heat and acts as an electronic brake to slow the turbine down.

  • No,that is the main benefit of the vertical design. Traditional horizontal "propeller" turbines create a high-pitched, annoying "chopping" noise. Our ST Tulip and Flower series utilise advanced omnidirectional maglev-style bearings, making them virtually silent and completely vibration-free, all you will hear is the wind. They are perfect for suburban blocks, tight caravan parks, and areas close to neighbours.

  • It will turn, but turning is not charging. The blades start rotating at about 1.5 m/s — a light breeze. Charging starts once the wind clears the cut-in speed of about 3.5 m/s, and output climbs from there — the rated figure is measured at 13 m/s (about 47 km/h). A gentle breeze keeps the turbine ticking over; it takes real wind to push real power into your batteries.

  • You should connect the wind turbine to a battery bank first, via a dedicated charge controller, rather than directly to an inverter. Connecting a wind turbine directly to a standard inverter will damage the equipment or cause the system to fail.

    🔋 The Correct Wiring SequenceTo safely capture and use the power, your setup must follow this exact order:

    1. Wind Turbine: Generates wild, fluctuating 3-phase AC power as wind speeds change.
    2. Hybrid/Wind Charge Controller: Converts the unstable AC power into steady DC power. It also protects the turbine from over-speeding by applying an electronic brake during high winds.
    3. Battery Bank (12V/24V/48V): Acts as a buffer to store the energy. It absorbs sudden power spikes from wind gusts and provides a steady source of energy.
    4. Off-Grid Inverter: Connects to the battery, converting the stored DC battery power into standard AC power for your household appliances.

    ⚠️ Why You Cannot Skip the Battery

    • Unstable Voltage: Wind speeds change second by second. Without a battery to absorb and smooth out these massive fluctuations, a direct-connect inverter would constantly turn off and error out.
    • Turbine Destruction: When a battery is full or disconnected, a wind turbine loses its "load" (resistance). Without that resistance, the blades can spin out of control in high winds and physically destroy the unit. The charge controller uses the battery connection to safely dump excess power and slow the turbine down.

  • Wiring & Installation Requirement:This wind turbine generates 3-phase AC power andcannotbe connected directly to a battery, solar controller, or home inverter. To operate safely, it must run through a dedicatedWind/Solar Hybrid MPPT Controller with an integrated Dump Load Resistor. The dump load prevents the turbine from over-speeding and destroying itself in high winds once your batteries are fully charged.

  • It is almost always one of three common installation issues. Check them in order:

    1. Your multimeter is set to DC (the most common mistake).

    • The issue: measuring the three turbine wires with the meter set to DC volts.
    • The reality: wind turbines generate 3-phase AC power directly from the stator.
    • The fix: switch your multimeter to AC volts (V~). Testing these wires on a DC setting gives a false reading near zero.

    2. The turbine is stalling because of a short.

    • The issue: the blades turn heavily and slowly, or lock up.
    • The reality: if any of the three AC output wires touch each other, or the controller’s internal braking diodes have short-circuited, it acts as a magnetic brake — the turbine can never spin fast enough to build voltage.
    • The fix: completely disconnect the turbine from the controller. If it suddenly frees up and spins much faster, the problem is a short in the wiring or a faulty controller.

    3. Voltage drop from thin cables.

    • The issue: thin wire run a long way from the tower to the battery shed.
    • The reality: thin solar or automotive cable over a long run (20 metres or more) loses the power as heat in the wire before it reaches the controller.
    • The fix: use heavy cable between the mast and the controller on long runs — minimum 8 AWG, ideally 6 AWG.

  • Because the number on the box is a peak rating, not a promise. A turbine’s rated output is measured at a specific wind speed — for these models that is 13 m/s, about 47 km/h — and most sites see far less most of the time. Your display shows what the wind is delivering right now, so it will sit well below the rated figure and move second by second with the wind. That is physics, not a fault.

    Where these turbines earn their keep is time: they keep charging through the night and through weather that shuts solar down. If the display shows 0 W while the blades are spinning, that is a different issue — see the 0 W question below.

  • Not necessarily — this is one of the most common questions we get, and it's rarely a faulty unit. It's usually a quick settings check, or (on a first-time install) how the wiring and start-up sequence were done. See our full Wind Turbine 0W Troubleshooting & Installation Guide for the complete walkthrough, or contact us and we'll help you sort it out.

  • Short answer: wire your bus bar and breakers before and after the controller, then power up in the right order — battery first, then solar, then wind. Getting the sequence right prevents almost all wiring issues, including the common “spinning but 0 W” problem.

    Correct installation comes down to isolation and the right sequence:

    • Fit a breaker before the controller (turbine/solar side) and after it (battery side), landing on a DC bus bar
    • Keep the turbine-to-controller cable run to 2–10 metres to limit voltage drop
    • Power up in this order: battery breaker first, then solar, then wind turbine last

    See our full How to Install & Start Up guide for the complete step-by-step walkthrough and wiring diagram.

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