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.
Power & Performance
- Peak output: 12 kW in strong winds (22+ m/s)
- Rated output: 3.8 kW at 15 m/s sustained wind
- Generates from: 6 m/s wind speed
- Daily energy yield: 3–28 kWh per day depending on site
- Annual yield: 2,800–10,500 kWh depending on average wind
In stock
Made to Order — Built Specifically for You
Add-Ons for Enhanced Experience
Inside the Magnum — Industrial-Grade Engineering
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.
- 12-pole, 36-slot, 3-phase distributed stator winding — fractional-slot configuration for minimal cogging torque and sinusoidal voltage output
- 90 wires per stator slot — 2 parallel strands × 45 turns of 0.70 mm Class 200°C enamelled copper (IEC 60317-13 GR 2), the insulation grade used in industrial servomotors and EV drivetrains, CE / UL certified
- Parallel-strand bundling doubles current capacity and distributes heat across multiple thin conductors — motor runs cold even at sustained full load
- 4 kg of pure copper total winding mass — exceptional thermal reservoir
- 24-magnet rotor with NdFeB N42 super magnets — bread-shape (~60×25×5 mm, nickel-coated), 180 cm³ total magnet volume
- Skewed magnet mounting — reduces cogging torque by ~80%, smoother torque curve and longer bearing life
- Silicon-steel laminated stator core — 240 individual 0.5 mm electrical-steel sheets stacked to 12 cm total height, ~16 cm outer diameter. Transformer/motor-grade construction that minimises eddy current losses (versus cheap cast-iron cores that overheat)
- ±0.05 mm precision tolerances across all machined components
- 2.35 m rotor diameter with aerodynamically optimized carbon fibre composite blades — 4.34 m² swept area
- Adjustable voltage limit (0–400 V max) — when paired with a TESUP charge controller (sold separately), set via MyTESUP mobile app or potentiometer; auto-brakes the turbine in overvoltage conditions (storm protection)
- Generator dimensions: stator Ø16 cm × 12 cm height (2.4 L); 24 magnets at 60×25×5 mm = 180 cm³ total
How power is calculated
Available wind power follows P = ½ × ρ × A × V³ × Cp × η. Wind speed (V) is cubed — small increases produce dramatic output gains. Magnum's carbon-fibre blade aerodynamics reach Cp 0.45 in good wind. Combined with 95% electrical efficiency from the parallel-strand premium copper winding and bigger 60×25×5 mm magnets, Magnum extracts ~43% of available wind energy as electricity — at the top of the small horizontal-axis class.
Magnum Power Curve (2.35 m rotor)
| Wind speed | Power output | Visual | Note |
|---|---|---|---|
| 22 m/s | 12 kW | peak (storm) | |
| 20 m/s | 9.0 kW | ||
| 18 m/s | 6.6 kW | ||
| 15 m/s | 3.8 kW | rated | |
| 12 m/s | 2.0 kW | ||
| 10 m/s | 1.1 kW | ||
| 8 m/s | 580 W | ||
| 6 m/s | 245 W | starts generating |
Designed and manufactured in Europe
TESUP operates in the United Kingdom and 37 other countries — the world's leading household wind turbine and solar panel manufacturer. Our European production facilities make over 270 components in-house, from generators and electronic cards to carbon fibre blades, silicon-steel stator laminations, and mounting hardware. Magnum is built once, then operates for 25+ years. Stock-dependent delivery from one day to four months.
See the Magnum in action
TESUP Magnum — generating 6–7 kW even at low wind speed.
Explore The Book By TESUP, to access our product manuals, delve into our values and mission and discover how we're shaping the future with renewable energy.
From Our Factories
Every TESUP turbine is tested before it ships. Browse our most recent quality checks.
Boxing Images
See how each TESUP turbine is packed and boxed before it ships. Browse our most recent dispatches.
Estimated yearly output and payback
| Average wind speed (m/s) | Estimated energy (kWh/yr) | Estimated saving / yr | Approx. payback |
|---|---|---|---|
| 4.0 | 772 | $139 | 6.3 yrs |
| 5.0 | 1,971 | $355 | 2.7 yrs |
| 6.0 | 3,788 | $682 | 1.4 yrs |
| 7.0 | 6,289 | $1,132 | 0.9 yrs |
Power curve
| Wind speed (m/s) | Power (kW) |
|---|---|
| 6 | 0.245 |
| 8 | 0.58 |
| 10 | 1.1 |
| 12 | 2 |
| 15 | 3.8 |
| 18 | 6.6 |
| 20 | 9 |
| 22 | 12 |
Magnum — Frequently Asked Questions
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 $0.18/kWh and the $999 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.
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.
Yes. TESUP designs and manufactures its own wind turbines, solar products and accessories in its European factories, and ships to customers worldwide. The photos below are recent, real images from our factory and dispatch area, published by our team as the work is done — so you can see products being built, boxed and prepared for shipping.
Updated regularly
