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Conversion System

  • $1,089.79

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Product Code: HD-DDF20-489

Availability: In stock

  • Special Parts for EZ-3 HD
  • 20 Mph / 9-42 Mile Range*
  • Pedal-Assist & Throttle On Demand

Subject to $35 DOT HazMat Shipping fee

Convert your SunSeeker EZ-3 HD to electric as seen on

Extras Included:

See details on the kit on video here:


E-BikeKit Front 500w Direct-Drive Hub Motor Conversion Kit
with 48 Volt Li-ion Battery Pack and Charger.

This premium electric bike conversion kit system is for riders that require the increased durability of a direct-drive motor for heavier loads and the long term reliability of a lithium battery. The direct-drive hub motor used in this conversion kit system is for heavier applications and a MUST for any total load (bike+rider+cargo) of 300lbs or more. This system pairs the heavy-duty motor with a 48v battery pack for increased torque and a 20MPH top speed.

Direct-drive motors are strong, durable, and long-lasting due to zero internal friction. Some lower quality or larger direct-drive motors have resistance, but that should not be a concern with this E-BikeKit direct-drive hub motor.

System Specs:
Watts: (Nominal/Peak) 500-1000w (EBK 22Amp Controller)
Top Speed: Approx. 20 MPH @48v in 26" Wheel
Range: 9-42 Miles* (see battery chart)
Charge Time: 2.5hrs (0-100%)
Weight: 24lbs (11kgs)
Performance: High
Efficiency: Medium
Stealth Factor: Low

Li-ion batteries provide a high level of performance for the duration of each discharge (unlike seal lead-acid where performance is diminished 1:1 as the pack is emptied). Li-ion batteries have a much higher power to weight ratio than lead-acid and 5-8 times the number of charge cycles (how many times a rechargeable battery can be charged from 0-100%). The li-ion option costs more initially, but over time, the "cost-per-cycle" is about half the cost of lead-acid. Li-ion packs also require less care as they can be left partially charged, and do not require immediate charging after each use. All batteries MUST be properly cared for during storage.

Battery Choice: 
We offer 3 battery packs for this kit - the 9Ah li-ion shrink wrapped battery is the lightest and smallest, at just 5.8lbs. The 20Ah li-ion shrink wrapped battery is the longest-lasting, with a 19-42 mile range. The 10Ah li-ion aluminum case battery sports a rugged enclosure, carrying handle, and locks in place with a key.

Model Weight Range Mount Style Cost
48v 9Ah Shrink Wrapped 5.8lbs 9-21 Battery bag w/ velcro straps mounting plate to mount to the rear frame Base Cost
48v 10Ah Alu 9.7lbs 10-24 Mounting plate to mount to the rear frame +$230
48v 20Ah Shrink Wrapped 14lbs 19-42 Battery bag w/ velcro straps mounting plate to mount to the rear frame +$380

Choosing Your Wheel Size:
 You can find your wheel size written on your tire. Available size options for this conversion kit are: 16", 20", 24", 26", 700c and 29er. Acceptable tire widths for the E-BikeKit rims: 1.15" (29mm) - 2.25" (57mm).

Learn More: Top 25 FAQ | Front vs Rear Wheel | Compatibility | Pedal Assist Compatibility

Note: Our kits include parts to fit a wide variety of bikes, but do not fit every bike without modification or extra parts. Our representatives are available to help with compatibility questions and make recommendations on additional parts that you may need.

Helpful Resources: Installation Videos | Owner's Manuals

Questions? Call us toll-free at 1-866-882-3245 and an experienced professional can assist you. Monday – Friday 9 am-5 pm EST. Outside of business hours get help fast via email.

Shipping Note: Li-ion batteries are shipped separately from electric bike kits. Li-ion battery packs are shipped via FedEx Hazmat and are require a signature for delivery. You may receive your kit, battery, and possibly the battery rack (if applicable), on separate days.

Brand: Electric Bike Technologies, Inc.
Type: Direct-Drive (brushless, disc brake compatible)
Power: 500w Nominal / >750w @36v / >1000 @48v
Max Torque: 39N-m @36v / 46N-m @48v
Max RPM: 194 @36v / 259 @48v
Cable: 8" Axle Exit, 3-Phase / 5 Hall Effect
Connector: Round 8-Pin 19/32" (10.4mm)
Weight: 12.8lbs (5.8kg)
Warranty: 1 Year (up to 48v - 600lb max load)

Nominal Voltage: 48v
Nominal Capacity: 9Ah / 10Ah / 20Ah (0.2C)
Battery Energy: 421Wh / 468Wh /  936Wh approx.
Dimensions: See table
Total Weight: 5.8lbs / 9.7lbs / 14lbs
Cell Assembly: 18650-3.6v-13S  4P / 5P / 10P
Life Cycles: 800-1000 Cycles
Max. Continuous Discharge: 20A / 22.5A / 50A 
BMS Protection Current: 30A / 30A / 60A
Discharge Cut-Off Voltage: 39v
Max. Charge Voltage: 54.6v
Inner Resistance: 180mΩ / 180mΩ / 220mΩ 
Charge Time: 4 hours / 3 hours / 5 hours
Operation Temperature Range: Charge: 0°C – 45°C / Discharge: -20°C – 60°C
Storage Temperature: 0°C – 40°C (Extended Storage: 15°C – 25°C;)
Battery Case Material: Blue PVC Heatshrink / Aluminum / Blue PVC Heatshrink
Assembled Pack Certificates: UL; UN38.3; MSDS; RoHS; SGS
Limited Warranty: 1 Year
Manufacturer: Electric Bike Technologies, Inc.

**System includes battery carrying rear rack.

UN 38.3 Certified e-bike battery
Assembled Pack Certificates: UL; UN38.3; MSDS; RoHS; SGS

Every E-BikeKit conversion kit comes with all of the parts you'll need for your conversion.

1 x USA Hand-Built Wheel w/ Disc-Brake Compatible Hub Motor
1 x 36/48V Compatible 22Amp 12FET Controller
1 x Programmable LCD Dashboard
1 x PAS 12-Magnet Split Disc
1 x PAS Sensor Left Side Mount (right side mount by request)
2 x 1 Thumb & 1 Split-Twist Throttle
2 x Left & Right E-Brake Levers
1 x Motor Cable
1 x Accessory Cable
1 x Battery Wire Harness (kits w/o batteries only)
1 x Freewheel (rears only)
1 x Battery
1 x Battery Charger
1 x Owner's Manual w/ Installation Guide
**Zip Ties, C-Washers & Torque Arms in Every Kit!

Extras For EZ-3 HD Kit:
1 x Pedal-Assist Extension Cable
1 x Locking Parking Brake Levers
1 x Topeak BarXtender
1 x Axiom Journey Rear Rack & Extra Long Rack Struts (for 9 and 20Ah batteries) or Seat Frame Bracket (for 10Ah batteries)



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