Magnum M77. Built once. 25 years of power.
Meet the power monster — MAGNUM: the world's leading horizontal wind turbine generator for homes, vessels, and off-grid sites. Trusted at the Arctic Discovery Research Centres, on California's finest homes, and aboard Maersk and MSC fleet ships.
This purchase includes the Magnum generator only. Charge controller and blade set sold separately.
In stock
Made to Order — Built Specifically for You
Magnum M77. Built once. 25 years of power.
Meet the power monster — MAGNUM: the world's leading horizontal wind turbine generator for homes, vessels, and off-grid sites. Trusted at the Arctic Discovery Research Centres, on California's finest homes, and aboard Maersk and MSC fleet ships.
This purchase includes the Magnum generator only. Charge controller and blade set sold separately.
Made to Order — Built Specifically for You
The motor inside Magnum is genuinely 15 kW continuous-rated — 50% more capacity than typical 10 kW competitors. This headroom protects the generator from gusts and dramatically extends service life.
Available wind power follows the formula P = ½ × ρ × A × V³ × Cp × η, where wind speed (V) is cubed — small increases in wind speed produce dramatic increases in output. Magnum's power coefficient (Cp) reaches 0.42 under ideal conditions thanks to its blade aerodynamics and skewed magnet design. Combined with 92% electrical efficiency, Magnum extracts ~39% of available wind energy as electricity — among the highest figures for small horizontal turbines.
| Wind speed | Power output | Visual | Note |
|---|---|---|---|
| 22 m/s | 10.9 kW | peak (storm) | |
| 20 m/s | 8.2 kW | ||
| 18 m/s | 6.0 kW | ||
| 15 m/s | 3.5 kW | rated | |
| 12 m/s | 1.8 kW | ||
| 10 m/s | 1.0 kW | ||
| 8 m/s | 0.5 kW | ||
| 6 m/s | 0.2 kW | starts generating |
Wekraft operates in the United Kingdom and 37 other countries — the world's leading household wind turbine and solar panel manufacturer. Our European production facilities produce over 270 components in-house, from generators and electronic cards to blades and mounting hardware. Magnum is built once, then operates for 25 years. Stock-dependent delivery from one day to four months.
How much space the turbine needs once mounted on its pole.
Approximate figures for one unit on the standard pole; the turbine yaws a full 360° to face the wind.
Every Wekraft turbine is tested before it ships. Browse our most recent quality checks.
See how each Wekraft turbine is packed and boxed before it ships. Browse our most recent dispatches.
| Average wind speed (m/s) | Estimated energy (kWh/yr) | Estimated saving / yr | Approx. payback |
|---|---|---|---|
| 4.0 | 669 | £181 | 4.1 yrs |
| 5.0 | 1,737 | £469 | 1.7 yrs |
| 6.0 | 3,379 | £912 | 0.9 yrs |
| 7.0 | 5,657 | £1,527 | 0.5 yrs |
| Wind speed (m/s) | Power (kW) |
|---|---|
| 6 | 0.2 |
| 8 | 0.5 |
| 10 | 1 |
| 12 | 1.8 |
| 15 | 3.5 |
| 18 | 6 |
| 20 | 8.2 |
| 22 | 10.9 |
Honest answers on output, payback, wind speed and siting.
It depends on your average wind speed. At a breezy 6 m/s site the Magnum produces roughly 3,000–3,800 kWh per year, and far more on exposed coastal or hilltop sites. Below its 6 m/s cut-in it generates little, so it suits open, windy locations. Use the "Will it pay for itself?" calculator on this page for your exact wind speed.
On a good wind site the Magnum can pay for itself remarkably fast — sometimes within a couple of years at a breezy 6 m/s average wind, at your local electricity price of about £0.27/kWh and the £799 price. Payback is longer on calmer sites and shorter on windier ones; rising electricity prices shorten it further.
The Magnum is a horizontal-axis turbine with a 6 m/s cut-in, so it is at its best on open, consistently windy sites — coasts, hilltops and exposed countryside. For sheltered or urban locations with lighter, gustier wind, the vertical-axis Atlas (2 m/s cut-in) is usually the better choice.
The Magnum uses a premium 15 kW continuously-rated motor but peaks at about 12 kW of output, so the motor runs far below its limit. Running an over-rated motor gently means less heat, less wear and a much longer service life — it is built to keep working reliably for decades.
Yes, for homes with a good, open wind exposure — rural properties, farms, coastal and hilltop sites. It is a powerful horizontal turbine that rewards steady wind. If your site is built-up or sheltered, consider the vertical Atlas, which starts in much lighter wind.
Yes. The Magnum is designed for grid-tied (on-grid) use with a compatible inverter and cabling, offsetting the electricity your home draws and, where allowed, exporting surplus. A charge controller and battery are not needed for on-grid use.
Yes — the Magnum is well suited to off-grid irrigation and farm pumping. Its three cables carry 3-phase power that can drive a pump directly. Because a wind turbine's voltage and frequency rise and fall with the wind, it pairs best with a permanent-magnet or DC pump (which simply pumps faster in stronger wind) — including Wekraft's own Industrial Permanent-Magnet Motor as a clean direct match. A standard induction pump can also be driven through a simple variable-speed drive (VFD) or soft-starter for reliable starting and protection, or you can pair the Magnum with a battery and inverter for steady, on-demand water. Choose a pump rated at a similar power to the turbine for the best results — no charge controller is needed for direct pumping.
Because the motor turns at roughly the wind turbine's speed — low RPM with high torque — pick a pump suited to that. A positive-displacement pump (helical-rotor / progressive-cavity, piston or diaphragm) is ideal for direct drive and is the standard choice for wind- and solar-powered borehole and irrigation pumping. Connect the motor shaft to the pump with a flexible coupling (direct 1:1) or a belt and pulleys — the belt also lets you set the speed ratio. If you prefer a standard centrifugal pump, add a belt-and-pulley or a 1:4 gearbox step-up to reach its design speed. Match the pump's power to the turbine for the best results.
Very little. With a heavily over-rated, gently-loaded motor and durable construction, the Magnum is designed to run for years with minimal upkeep — an occasional visual check is usually all that is needed.
The Magnum is built from premium, corrosion-resistant aluminium — a lightweight, marine-grade metal that resists UV, salt and frost. Paired with its heavily over-rated motor, that durability is why the Magnum is built once to keep generating for around 25 years of reliable power. Aluminium is also 100% recyclable, so at the end of its long life the turbine can be fully recycled — clean energy made from a sustainable material.
Yes. Wekraft designs and manufactures its own wind turbines, solar products and accessories in its own factories, and delivers worldwide from local warehouses across many regions. The photos below are real, recent images from our factories and dispatch areas, published by our team as the work is done — so you can see products being built, boxed and prepared for shipping.
Updated regularly
Verified reviews from real Wekraft owners
ordered the first versions of the Wekraft Magnum wind turbines in 2018 for Northern Pole research missions, and they have been generating electricity reliably in some of the roughest conditions on Earth.
Wekraft Magnum — generating 6–7 kW even at low wind speed.
