The Windpower Air 40 Wind Turbine by Primus
The Air 40 by Primus is the premier micro-wind turbine for land-based applications.
Efficient operation across a wide range of wind speeds makes the Air 40 ideal for pairing with solar to offset seasonal variation, delivering more consistent energy.
- Advanced microprocessor technology for superior performance and high wind protection without mechanical braking.
- Blades designed for quieter operation, durability and optimum energy capture in most wind speeds.
- Lightweight design is simple and easy-to-install; integrated controller for plug-and-play operation
- Pair with solar PV for redundant energy production year-round.
- Produces 40 kWh of energy per month generating energy in a wide range of wind speeds
Primus Windpower Wind Turbine Specifications
|Energy||Approx. 40 kWh/mo at 5.8 m/s (13 mph)|
|Swept Area||1.07 m2 (11.5 ft2)|
|Rotor Diameter||1.17 m (46 in)|
|Weight||5.9 kg (13 lb)|
|Shipping Dimensions||686 x 318 x 229 mm (27 x 12.5 x 9 in) 7.7 kg (17 lb)|
|Startup Wind Speed||3.1 m/s (7 mph)|
|Voltage||12, 24 and 48 VDC|
|Turbine Controller||Mircoprocessor-based smart controller|
|Body||Permanent mold cast aluminum|
|Blades||(3) Injection-molded composite|
|Alternator||Permanent magnet brushless|
|Overspeed Protection||Electronic torque control|
|Survival Wind Speed||49.2 m/s (110 mph)|
|Mount||1.5 in schedule 40 pipe 48 mm (1.9 in) outer diameter|
|Wind Speed Operating Range||3.1-22 m/s (7-49 mph)|
|Optimum Wind Speed Range||
4.5-22 m/s (10-49 mph)
Primus Air 40 Wind Turbine Series Manual
The body of the Primus Windpower Air 40 is constructed of permanent mold cast aluminum and the three blades are made of carbon molded composite.
The generator can be used for multiple types of off-grid power applications including telecom, security systems, cabins, tiny homes, and trailers. It can also be used in conjunction with a solar system to supplement battery charging.
Requiring only a 7mph wind for startup, the AIR 40 will produce 40 kWh per month with an average wind speed of 13 miles per hour.
It comes with a built-in microprocessor controlled charge controller and the option of using an external load diversion controller.
The wind generator cannot be connected directly to a power inverter. It must be used to charge a 12-volt battery bank.
Your inverter will get its power from the batteries.
Comes with a 5-year manufacturer's warranty.
Primus Windpower Applications Chart
Free Shipping Promotion:
Shipping costs for our business are typically around $10 for accessories can range and up to $450 for larger items. However, for a limited time only, we are offering free shipping on all products to the lower 48 states in the U.S.. No minimum order required!
If you would like an order shipped to anywhere else in the world, please email us at sales@ShopTinyHouses.com, and we will gladly work something out with you!
ShopTinyHouses.com reserves the right to cancel this offer at anytime
After you place your order, you will receive a confirmation email. This means that we have received your order in our system. As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and ready for shipment. If your item happens to be on backorder, or is otherwise unavailable, we will let you know via email. Once your item(s) are available for immediate shipment, we will ship the order.
Your order will ship within the lead time we have posted on the product page. We will email you tracking information within 24 hours of your order leaving the warehouse. If you do not receive tracking information from us by 3 days after the lead time posed on the product page has elapsed, feel free to follow up with us at sales@ShopTinyHouses.com.
Most orders will be shipped by FedEx or UPS. Small items may be delivered by the US Postal Service or by the US Postal Service via FedEx Smartpost or UPS Surepost. Larger items may be delivered via FedEx Ground, FedEx Home Delivery, UPS Ground, or Truck Freight. Items shipping via Truck Freight are clearly marked on our website and catalog. Some special orders may require 2 to 6 weeks depending on the item.
Some large or heavy items require additional shipping and handling charges due to the bulky nature of these products. If an item requires additional shipping and handling charges we will clearly mark this requirement on our website and in our catalog. In most cases, we charge a "flat" rate to ship these items.
Free shipping applies to orders totaling over $99 shipped to a final destination within the contiguous 48 states of the United States. Certain items do not qualify for free shipping regardless of order total. Items that do not qualify for free shipping will be clearly marked on our website. ShopTinyHouses.com reserves the right to cancel this offer at anytime. Delivery to rural or extended areas, special order, & Truck Freight shipments may take extra days to arrive. Please call (888) 467-5447 for details.
International Orders (except Canada) require special processing. When you are entering an International Order, please complete all the necessary information. We will get a shipping quote from one of our International shippers. We will contact you with the final charges for approval. The order will not be shipped or charged unless it is confirmed by you. Please note: You will be responsible for any applicable taxes and/or duties that will need to be paid upon delivery.
Canadian Orders: We do not ship directly to Canada, however, we will ship to a US-based freight forwarder of your choice! We recommend you first contact the desired freight forwarder to obtain their shipping and receiving processes. You will be responsible for all duties and tariffs on Canadian shipments, along with coordinating with the freight forwarder for delivery to final destination. Please call (888) 467-5447 for assistance, otherwise enter the shipping address provided by your US-based freight forwarder.
ALL SHIPMENT SHOULD BE INSPECTED AT THE TIME OF DELIVERY. DAMAGED PACKAGES SHOULD BE REFUSED. If you notice any damage, you should note it on the freight bill when signing for delivery. If your product is defective or sustains damage during shipping, please contact us at sales@ShopTinyHouses.com right away. Remember to keep all the original packaging for any items that need to be returned. All returns need to be authorized by our customer service department prior to being processed.
If delivered by Truck Freight, please contact the freight carrier at the phone number on the carrier’s bill. After contacting the carrier, please call ShopTinyHouses.com Customer Service at (888) 467-5447 for further assistance with the damaged shipment. Please note, signing for your delivery without noting any damages or inability to inspect the delivery on the relevant paperwork legally states that you have received your freight in good condition and ShopTinyHouses.com cannot be held liable for any damages, missing pieces, etc. that may be incurred as a result of this decision. Leaving a note or instructions for the driver is considered to be the same as signing for your products in good condition. If you authorize the freight company to leave freight without a signature, ShopTinyHouses.com cannot be held liable for any damages, missing pieces, etc. that may be incurred as a result of this decision. If you choose to sign for a visibly damaged please note on the relevant paperwork that you are signing for a damaged package; however, ShopTinyHouses.com cannot be held liable for any damages or missing pieces for accepted via signature delivery.
Cancellations & Refunds:
To cancel an order, reply to the confirmation email you received when you placed your order online. Just tell us why you need to cancel and we will process it as soon as we can. All orders canceled after 48 hours are subject to a $50 administration fee, regardless of whether your order has shipped. If you order has shipped, you will also be responsible for return shipping charges. Refunds will be issued to the credit card that you used when placing your order minus a 10% restocking fee.*
How do I return a product?
If you want to return an item, please send an email to Returns@ShopTinyHouses.com.
Returns will only be accepted within 30 days** of the receipt of your product. The product must be returned unused in the original packaging.
We do not accept returns of used products. You should also provide us with a receipt of your purchase and a reason for returning the item.
Please note that you cannot return an item without a valid return authorization number.
You (the customer) are responsible for return shipping to the address given at the time you receive your RMA. In addition, there will be a 10% restocking fee on all returned products.
Upon receiving and inspecting the returned product, ShopTinyHouses.com will issue a refund for the full amount (minus restocking fees) to the credit card used for the purchase only.
* A 20% re-stocking fee will be applied for all Aqua2Use and Dry Flush products
** For all Emergency Water Well products, the item must be returned within 10 days for receiving the product. All other conditions above apply.
Questions & Answers
Have a Question?
What type of surge protector (lightening protection) do you recommend?
It is always a good idea to use lightning protection. The DELTA LIGHTNING ARRESTOR (model LA 302-DC – 3 WIRE – 500 V) is widely used. In addition, it is also recommended to use the MidNight Solar – MDSPD – 300 - DC. Grounding your system is also very important in protecting against lightning. We do not carry these products but they can be easily sourced on the internet.
How many batteries will I need and what type
Deep cycle batteries are required (types include: flooded lead acid, absorbed glass mat (AGM), gel cell and NiCad.) for use with the Primus Windpower Air 40 Wind Turbine. IMPORTANT: Never use “automotive” batteries or any battery other than a “deep-cycle” battery. The number of batteries that you will need will vary depending on your usage. To calculate the number of batteries you will need, see page 11 of the downloadable manual on the product page. This formula will help you get the right number of batteries.