This 3-phase gearless permanent magnet generator (PMG) is the workhorse of DIY renewable energy projects. Rated 100W, 200W or 300W in 12V or 24V, with single or double shaft, it pairs with wind turbines, micro-hydro setups, pedal generators and test benches.
Key benefits
- Gearless direct drive — fewer moving parts, lower maintenance, higher reliability.
- Low cut-in RPM — multi-pole permanent magnet design produces useful voltage from low rotor speeds.
- 3-phase AC output — easy to rectify and condition for 12V or 24V battery charging.
- Single or double shaft — flexible coupling for wind, water and bench applications.
- Optional mounting base — ready to bolt onto your turbine head or frame.
Technical specifications
| Rated power | 100W / 200W / 300W (selectable) |
|---|---|
| Rated voltage | 12V or 24V (selectable) |
| Output type | 3-phase AC (rectifier required for DC battery charging) |
| Drive type | Gearless direct drive, permanent magnet |
| Shaft configuration | Single shaft or double shaft |
| Mounting | With or without mounting base |
| Typical applications | Wind turbine, micro-hydro water turbine, pedal generator, DIY renewable projects |
| Optional accessory | Wind charge controller bundle |
What’s in the box
- Permanent magnet generator (rating and shaft type per your selection)
- Mounting base (only if the 'with base' option is selected)
- Wind charge controller (only if the controller bundle is selected)
- Datasheet with wiring instructions
Blades, hub, tower, rectifier and battery bank are not included — the PMG is sold as a core component so you can build the system you need.
Best use cases
- DIY small wind turbines (1–1.5 m rotor diameter)
- Micro-hydro and Pelton-wheel water turbines
- Pedal generators and emergency hand-crank systems
- Educational and laboratory renewable-energy benches
- Off-grid charging when paired with a rectifier and charge controller
Compatibility
Compatible with any 3-phase bridge rectifier and 12V/24V wind or hybrid charge controller. Works with AGM, gel, flooded lead-acid and LiFePO₄ batteries when paired with a matching charge controller.
Shipping, warranty and support
Shipped tracked from our warehouses. Each PMG includes a manufacturer warranty against defects and email support for wiring, rectifier sizing and controller selection.
Frequently Asked Questions
- What is a permanent magnet generator (PMG) used for?
- A PMG converts mechanical rotation into 3-phase AC electricity without brushes or gears. It is the core component of small wind turbines, micro-hydro systems, pedal generators and any DIY renewable project where you want a low-RPM, low-maintenance generator.
- Do I need a controller or rectifier?
- Yes. The PMG outputs 3-phase AC. To charge a 12V or 24V battery bank you need a 3-phase rectifier and a charge controller (a wind or hybrid charge controller is recommended). The bundled wind controller option helps regulate voltage and protect the battery.
- What is the difference between single and double shaft?
- Single shaft has one keyed output — typical for wind turbines and pedal generators. Double shaft has an output on both ends, which is convenient for water turbines, lab benches and dual-coupling setups.
- How do I choose between 100W, 200W and 300W?
- Match the generator rating to your prime mover. A small Pelton water wheel or a 1–1.5 m rotor diameter wind turbine pairs well with 100–200W. Larger rotors, faster streams or high-RPM drives can take advantage of the 300W version.
- Does the 'with base' option include a mast or tower?
- No. 'With base' refers to a mounting flange that bolts the generator to a frame, tower head or test bench. The tower or hydro housing is not included.
- Is it suitable for off-grid battery charging?
- Yes. With a matching rectifier and charge controller, the PMG charges 12V or 24V battery banks from wind, water or any rotating energy source. Cut-in RPM is low thanks to the multi-pole permanent magnet design.
