The DL-300 charge controller is an integrated solution designed to prevent 12 or 24 Volt batteries from overcharging. It is designed to be used with the LE-v150, LE-300 and LE-300 marine wind turbines. Compact and easy to install, the DL-300 was developed especially for the Leading Edge range of turbines. It incorporates a 300 Watt resistor / heater and controller board in a stout powder coated steel enclosure. The DL-300 controller operates like an electrical overflow for your batteries. This means that the turbine is always running – and not being switched on and off as is the case with other charge control methods. It also means that your batteries are never ‘cycled’ through on / off charging techniques and this will prolong the life of your expensive battery bank.

As the wind turbine charges the batteries, the State of Charge (SOC) and battery voltage will rise. As the batteries become fully charged and are no longer able to accept any further electrical energy, the battery voltage will rise. At this point, the DL-300 begins to bleed power to the dump load. This energy is then dissipated as heat into the surrounding environment. More or less power is diverted to the dump load according to how much is being supplied to the battery from the turbine.

Available in 12 and 24V options.

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Leading Edge DL-300 Wind Turbine Controller (12/24V)


£260.57 ex. VAT

Technical Specification

The DL-300 Features:
PWM (Pulse Width Modulation) for highest charging performance without flicker
Selectable three stage charging or over-voltage protection mode
Selectable for sealed or flooded batteries using jumpers

Power (at 12V):
Recommend fuse or circuit breaker: 30 Amps
Integrated load resistor: 300 Watt, wire wound
Quiescent current when not load dumping: 2.6mA @ 12 Volts

Power (at 24V):
Recommend fuse or circuit breaker: 15 Amps
Integrated load resistor: 300 Watt, wire wound
Quiescent current when not load dumping: 3.0mA @ 24 Volts

#10-32 brass screws for V+ and VTwo
1/2" / 3/4" concentric NPT knockouts and two 1/2" NPT knockouts

Mounts to vertical concrete, metal, drywall, or other non-flammable surface
Uses four #10 screws
Body sits 19 mm out from wall
Enclosure suitable for indoor mounting

Weight and Dimensions:
Dimensions: 88 mm wide, 95 mm tall, 470 mm long (3.375 x 3.75 x 18.5 in)
Weight: 1.94 Kg (4.28 pounds)
Shipping Dimensions: 102 mm wide, 108 mm high, 508 mm long (4.0 x 4.25 x 20 in)
Shipping Weight: 2.15 Kg (4.75 pounds)

Enclosure: 18 gauge mild steel, powder coated black
Circuit board: FR-4, 1.6 mm (0.062 in), double sided, plated through holes, solder mask, silk screen,
gold plating.

12V Setpoints
Battery Type

24V Setpoints
Battery Type
*All technical specifications and images are correct at the time of publication, but are subject to change without notice.
Your item has been added to your basket

Leading Edge DL-300 Wind Turbine Controller (12/24V)


£260.57 ex. VAT

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