Wind Turbine FAQs
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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 or 20kW 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 catalog are categorized by physical design shapes, which dictate their ideal applications.
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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.
-
Yes.These turbines have an incredibly low startup wind speed of just 2.0 m/s, meaning the blades will begin rotating in a very gentle breeze. However, please note that physical power generation only starts accumulating once wind speeds consistently clear 4 to 5 m/s.
-
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:
- Wind Turbine: Generates wild, fluctuating 3-phase AC power as wind speeds change.
- 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.
- 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.
- 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 caused by one of three common installation errors. Check these variables in order: Checking the Multi-Meter Setting (Most Common Mistake)
- The Issue: The customer is likely measuring the three wires coming out of the turbine using a DC voltage setting on their multimeter.
- The Reality: Wind turbines generate 3-Phase AC power directly from the stator.
- The Fix: Instruct them to switch their multi-meter to AC Voltage (V~). Testing the wires under a DC setting will provide a false, completely inaccurate reading near zero.
2. The Turbine is Stalling Due to Incorrect Wiring
- The Issue: The turbine blades are spinning heavily but turning very slowly or locking up because of an electrical short.
- The Reality: If any of the three AC output wires are accidentally touching each other, or if the controller's internal braking diodes have short-circuited, it creates a magnetic brake. This bogs down the turbine, physically stopping it from spinning fast enough to build voltage.
- The Fix: Have them completely disconnect the turbine from the controller. If the turbine suddenly unbogs and spins much faster when disconnected, the problem is a short circuit in the wiring or a faulty controller.
3. Voltage Drop Caused by Thin Cables
- The Issue: The customer ran thin wiring over a long distance from the tower down to the battery shed.
- The Reality: If they used standard thin solar cables or thin automotive wire over a long distance (e.g., 20+ metres), the natural resistance of the copper wire will choke out the electricity. The energy is lost as heat inside the wire before it ever reaches the meter.
- The Fix: Ensure they are using heavy-duty, minimum 8 AWG or 6 AWG thick cable lines between the mast and the controller house
-
Wind turbines are rated byCumulative Daily Capacity, not instantaneous hourly peak output. Because wind speeds fluctuate constantly second-by-second, a 1200W turbine is designed to yield up to 1200W of total poweraccumulated over a 24-hour periodin optimal conditions (averaging roughly 50W per hour). This constant, steady trickle is exactly what makes vertical turbines perfect for maintaining batteries overnight when solar panels are offline.
-
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 this sequence right prevents almost all wiring issues, including the common "spinning but 0W" problem. Answer (rich text field, with the link placeholder): 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.
Battery Isolator Switch 300A 12V-48V DC Rotary Disconnect
Tracking
Tracking
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Simply enter the tracking number sent to your email to see exactly where your package is and when it is estimated to arrive.
Note: It may take 24-48 hours for tracking information to update after your order has been dispatched.
Delivery and Shipping
Delivery and Shipping
At Bushline, we believe getting your gear should be easy. That is why we offer Free Standard Shipping to every customer in Australia and New Zealand. No minimum spend, no surcharges.
How Long It Takes
We quote these times from the day you place your order, not from the day we dispatch it. That is the number that actually matters to you, and quoting it any other way just moves the goalposts.
- Most gear: 10 to 14 days from the day you order. Allow up to 3 weeks.
- New Zealand: Same as above. NZ orders run to the same timeframe as Australian ones.
- Large wind turbines: Allow up to 5 weeks. These are heavy, oversized units and they travel on slower freight than everything else.
- Regional & remote areas: Please allow extra time on top of the above.
Dispatch & Tracking
- Pick & Pack: We aim to dispatch within one business day (Monday to Friday). Most orders go out within two.
- Weekends: Orders placed on weekends or public holidays are processed the next business day.
- Tracking: You will get a Shipping Confirmation email with your tracking number as soon as your order ships.
If Your Order Is Running Late
Ring 0400 333 898 or email Support@BushLine.com.au and we will chase the tracking ourselves rather than sending you off to do it. You will get a straight answer on where it is, including if it has not moved.
Need A Large Turbine Sooner?
Expedited freight is available on the big units at extra cost, which brings delivery down to roughly a fortnight. It is quoted per order because it depends on the size of the unit and where it is going. Get in touch before you order and we will price it for you.
Somewhere to shut the whole bank down.
Every off-grid setup needs one switch that takes the battery bank out of the circuit. Not a breaker that might have tripped, not a fuse you have to find in the dark — one handle you turn, so that everything downstream is dead while you work on it. Without it you are pulling a lug off a live 48V bank with a spanner, and that spanner only has to touch one other thing.
This is that switch. A single-circuit ON-OFF rotary isolator rated 300A continuous at up to 48V DC, on tinned copper M10 studs sized for 120 mm² cable. It also carries a 500A five-minute rating and a 900A thirty-second cranking rating, which is why it suits a starter circuit as well as a house bank.
Be clear about what it is. This is a battery disconnect switch. It is not a fuse and it does not trip on a fault, so it does not replace breakers. And it is not the right part for switching a solar string — a PV array needs a purpose-built DC isolator certified to IEC/EN 60947-3. There is one in the range, linked below.
What It Solves
- Work on the bank with it isolated: one handle and the battery is out of the circuit, so what you are holding is dead instead of carrying a few hundred amps' worth of potential.
- Shut it down in a hurry: a big red rotary knob is something anyone can find and turn, including whoever is standing there when you are not.
- Stop the slow drain while it sits: a van, boat or shed setup left for a month still has small loads pulling on it. Turn the isolator off and the bank is genuinely disconnected.
- Handles a starter circuit too: the 900A cranking rating means it copes with an engine start, not just steady house loads.
- Takes real cable properly: M10 tinned copper studs with 28.45 mm of clearance, so a 120 mm² lug lands flat instead of being bent to fit.
Key Features
- 300A continuous: plus 500A for five minutes and 900A for thirty seconds of cranking.
- Up to 48V DC: covers 12V, 24V and 48V systems.
- Tinned copper studs: the tinning is what stops the terminals corroding green in marine and coastal air.
- M10 terminal studs: 3/8"-16 in the supplier's units, torqued to 13.56 Nm.
- Sized for 120 mm² cable: 28.45 mm of clearance around the stud so heavy lugs fit without fouling.
- Two positions, one circuit: straight ON-OFF. It does not combine banks and it does not disconnect an alternator field.
- Compact housing: fits a battery box or a switch panel where a bigger disconnect will not.
- Red knob: obvious, which is the whole point of a safety switch.
Where This Fits
An isolator is one part of the gear that sits between a wind turbine and your battery bank. Here is the whole picture:
- PV solar DC isolator: for switching a solar string, use that one instead. It is rated 1200V DC and certified to IEC/EN 60947-3, which is the standard a PV array needs.
- Wind turbines: vertical axis turbines from 1kW to 20kW — quiet enough to put near the house, and they charge overnight when your solar cannot.
- Hybrid MPPT controllers: you cannot wire a turbine straight to a battery. The controller rectifies the output, manages the charge, and brakes the turbine when the bank is full.
- The rest of the electrical range: bus bars, breakers, cable, lugs and Anderson plugs.
Every input and output wants a breaker or isolator on it, so you can safely shut down and isolate the turbine before you touch anything. That protects you, and it stops a surge damaging your new turbine or the rest of your power system. Cable sizing depends on run length, voltage and current — check it against your own run or ask your sparky, and keep the invoice, because our warranty on electrical items asks for proof of professional installation.
Q & A
Can I switch it while current is flowing?
Treat it as a disconnect you operate with the load off, not a load-break switch. The supplier does not state a DC make-and-break rating or an arc-breaking certification, and we will not assume one. Shut the loads down first, then turn the isolator. In an emergency, turning it is far better than not — but do not make a habit of switching it under full load.
Can I use it on my solar array?
No, use a proper PV isolator. A solar string sits at a few hundred volts and a DC arc at that voltage does not self-extinguish. The 1200V PV disconnect switch is built and certified for that job. This one is a battery disconnect.
Does it protect against overcurrent?
No. It is a switch. It does not trip on a fault, so you still need a main battery breaker or fuse plus protection on each circuit. An isolator and a breaker do two different jobs and a system wants both.
What size cable do I need?
The supplier states 120 mm² (4/0 AWG) to meet the full ratings, with 28.45 mm of clearance around the stud. If your run does not need 300A you can use lighter cable, but size it to your own current and run length — and remember the whole run is only as good as its thinnest part.
The old title said 100A-300A. Which is it?
The supplier's specification sheet gives one set of figures: 300A continuous, 500A for five minutes, 900A cranking for thirty seconds. That is what we publish, and it is why the title now says 300A. Size your cable and protection to your actual load rather than to the top number.
Will it combine two battery banks?
No. It is a single-circuit ON-OFF switch with one battery input. It does not combine banks and it has no alternator field disconnect, so if you are switching a running alternator's circuit you need a switch that does.
Is the CE mark verified?
The supplier states CE. We have not sighted a certificate or a test report, so we print it as their claim rather than ours. If you need documented compliance for an insurer or an inspection, ask us before you buy and we will chase the supplier.
Specs
| Product type | Battery disconnect / isolator, rotary |
| Switch type | Single circuit ON-OFF |
| Switch positions | 2 |
| Maximum voltage | 48V DC |
| Continuous rating | 300A |
| Intermittent rating | 500A for 5 minutes |
| Cranking rating | 900A for 30 seconds |
| Battery inputs | 1 |
| Battery combine | No |
| Alternator field disconnect | No |
| Terminal stud size | M10 (3/8"-16) |
| Terminal stud material | Tinned copper |
| Terminal stud torque | 13.56 Nm |
| Cable size to meet ratings | 120 mm² (4/0 AWG) |
| Cable clearance | 28.45 mm |
| Mounting holes | Accept a #10 screw (about 5 mm) |
| Colour | Red |
| Overcurrent protection | None — this is a switch, not a fuse or breaker |
| DC arc-breaking certification | Not specified by supplier. Not for switching a PV string |
| Certification | CE — stated by supplier, no certificate sighted |
| Ingress rating | Not specified by supplier |
| Dimensions | Not specified by supplier |
| Weight | Not specified by supplier |
Watch Me
No video on this one. If you are wiring an off-grid system, these two guides cover the sequence and the hazards:
- How to install and start up a wind turbine — the correct order of connection, and the two shock hazards to know first.
- Wind turbine spinning but showing 0W — nearly always wiring or setup rather than faulty gear.
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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 or 20kW 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 catalog are categorized 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.
-
Yes.These turbines have an incredibly low startup wind speed of just 2.0 m/s, meaning the blades will begin rotating in a very gentle breeze. However, please note that physical power generation only starts accumulating once wind speeds consistently clear 4 to 5 m/s.
-
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:
- Wind Turbine: Generates wild, fluctuating 3-phase AC power as wind speeds change.
- 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.
- 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.
- 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 caused by one of three common installation errors. Check these variables in order: Checking the Multi-Meter Setting (Most Common Mistake)
- The Issue: The customer is likely measuring the three wires coming out of the turbine using a DC voltage setting on their multimeter.
- The Reality: Wind turbines generate 3-Phase AC power directly from the stator.
- The Fix: Instruct them to switch their multi-meter to AC Voltage (V~). Testing the wires under a DC setting will provide a false, completely inaccurate reading near zero.
2. The Turbine is Stalling Due to Incorrect Wiring
- The Issue: The turbine blades are spinning heavily but turning very slowly or locking up because of an electrical short.
- The Reality: If any of the three AC output wires are accidentally touching each other, or if the controller's internal braking diodes have short-circuited, it creates a magnetic brake. This bogs down the turbine, physically stopping it from spinning fast enough to build voltage.
- The Fix: Have them completely disconnect the turbine from the controller. If the turbine suddenly unbogs and spins much faster when disconnected, the problem is a short circuit in the wiring or a faulty controller.
3. Voltage Drop Caused by Thin Cables
- The Issue: The customer ran thin wiring over a long distance from the tower down to the battery shed.
- The Reality: If they used standard thin solar cables or thin automotive wire over a long distance (e.g., 20+ metres), the natural resistance of the copper wire will choke out the electricity. The energy is lost as heat inside the wire before it ever reaches the meter.
- The Fix: Ensure they are using heavy-duty, minimum 8 AWG or 6 AWG thick cable lines between the mast and the controller house
-
Wind turbines are rated byCumulative Daily Capacity, not instantaneous hourly peak output. Because wind speeds fluctuate constantly second-by-second, a 1200W turbine is designed to yield up to 1200W of total poweraccumulated over a 24-hour periodin optimal conditions (averaging roughly 50W per hour). This constant, steady trickle is exactly what makes vertical turbines perfect for maintaining batteries overnight when solar panels are offline.
-
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 this sequence right prevents almost all wiring issues, including the common "spinning but 0W" problem. Answer (rich text field, with the link placeholder): 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.
