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EnDuraLast 4 High Output Lithium Charging System (450w / 32 Amp) - ALL BMW Airheads
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Part #: EDL4Li

Limited time SALE price!

THE ultimate Lithium style battery compatible upgrade for your BMW Airhead's charging system is this 450w alternator kit.
  • Updated design with fewer components.
  • One kit fits ALL Airheads - no need to know the stator size.
  • Simple installation.
  • Detailed Installation Guide- see HERE
  • Lithium Battery compatible.
  • Will also work with AGM or Lead-Acid batteries with a slightly lower voltage regulation.
  • Mosfet R/R with voltage conditioners to manage voltage ripple and appropriate voltage regulation.
  • Brushless.
  • Ideal for any custom build for a clean simple and powerful electrical system.
  • All components mount in stock locations, no fabricating of brackets etc. required

The Kit includes all the components to replace your under-performing 240w BOSCH charging system.
Featuring a Permanent Magnet Rotor which eliminates the brushes and potential rotor failure. The Hi-Output Stator produces significant AC voltage at lower RPM's not possible with the original system. The new lithium specific MOSFET regulator rectifier is specifically designed to mount under the front engine cover replacing the diode board for a clean, simple installation. With a combined Voltage Regulator / Rectifier, the two components most vulnerable to failure on the BOSCH charging system, namely the diode board and the voltage regulator are eliminated.
In addition the kit includes a Rotor Removal Tool, a new timing cover Oil Seal and a Caliper for accurate measurements. Will work with conventional wet acid and AGM batteries, however will have a slightly lower voltage regulation of 14.3 volts +/- 0.3 (as required by Lithium type batteries).

Complete your upgrade with the
EnDuraLast Crank Mounted Ignition System, EDL-IGNS that is specifically designed to mount on this alternator!

The /5 Airhead models require a starter relay modification. Please review the Installation Guide for details.

Vehicle Manufacturer: BMW
Application: BMW Airhead Models
Make/Model: BMW R45, R50, R60, R65, R75, R80, R90, R100

Model Years: 1969 to 1996
Power Rating: 450 Watts @ 14 Volts = 32 Amps

Brand :
USD Price $599.99
BUY NOW $565.00

Quantity in Stock:4

Part #: EDL4LI

  • Updates the BMW Airhead original, under-performing 20 amp (max) alternator and diode board with modern components.
  • The critically important higher amperage output of this system at low engine RPM's allows use of lighting, heating and other accessories to be used without discharging the battery or overloading the original charging system.
  • High-tech permanent magnet rotor will never overheat and short out. Brushless design eliminates worn out rotor slip rings and brushes.
  • Eliminates "burnt out warning light" no-charge condition of Bosch systems
  • MOSFET lithium specific voltage regulator / rectifier housed in machined billet aluminum housing mounts where the original diode board was providing a clean simple installation.
  • Bolts right on and wires up with minimal wiring.
  • Original alternator/engine cover fits over the alternator with no alterations required.
  • Designed and manufactured to modern OEM specifications.
  • Incredible low RPM output of 280 Watts at just 2000 RPM's
Why do you need a different voltage regulator for lithium batteries?
Lithium batteries have different charging requirements than Lead Acid or AGM batteries that can severely affect their lifespan and performance. The key factors in safe and reliable lithium battery charging are the output DC voltage ripple and average output voltage.

The ripple effect is all that matters?
Charging voltage ripple in a powersports application is the difference between the highest and lowest voltages from the voltage regulator output. By nature, a common shunt style voltage regulator will have a fairly high voltage ripple due to the regulation shunt switches opening and closing frequently. Each on/off transition will cause some variation in the output voltage, this is unavoidable. Keeping this to minimum is critical for Lithium batteries.
In a perfect world, a ripple of less than 10% of the output voltage (~1.5V for a typical regulator), would be ideal, however is not practical for this type of regulator. The EDL4Li-VoltRect Lithium Specific regulator is able to maintain a less than 4 Volts output ripple, compared to verified test results of our competitors 8 volts. Keep in mind this ripple voltage is only seen via an Oscilloscope sampling the voltage 1000’s of times a second, and is not the same as your average charging voltage as measured by a multimeter.

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