Nucular X6F Controller: Specs, Wiring and Which HPC Builds Use It
The Nucular X6F is a 15kW FOC e-bike controller about the size of a credit card, and it is now the controller HPC puts in every new build and conversion kit. If you are comparing controllers or planning a wiring job, this is the spec sheet and setup guide in one place: the ratings, what you need to buy alongside it, how the pieces connect, and which HPC products use it.
Nucular X6F specs at a glance
| Spec | Nucular X6F |
|---|---|
| Price | $400 |
| Control | Field-oriented control (FOC) |
| Max power | 15kW |
| Max phase current | 250A |
| Max battery current | 170A |
| Max battery voltage | 90V (21S) |
| Dimensions | 55 x 34 x 77 mm |
| Weight | About 8 oz |
| Board | 8-layer low-inductance design |
| Capacitors | Polymer solid electrolyte, low ESR |
| Cooling | Custom top-side cooling MOSFETs, hard-anodized aluminum case, removable color heatsink |
| Setup | Requires a Nucular display or the Nucular Bluetooth module for programming |
These figures come from the product page. Maximum ratings are ceilings, not what a given bike will draw. The actual power depends on your battery, motor and the limits you set.
What the ratings mean in practice
- 15kW and 90V (21S). The X6F accepts packs well above the 48V to 63V range of HPC's previous-generation controllers, so you can move to a higher-voltage battery later without changing the controller. Our high-voltage battery guide explains the trade-offs.
- 250A phase and 170A battery current. Phase current is what the motor sees and drives torque. Battery current is what your pack and wiring must supply. Your battery's discharge rating should match the limit you set. See E-Bike Controllers Explained for the basics.
- FOC. Field-oriented control gives smoother, quieter power from a standstill and wastes less energy as heat than older square-wave designs.
- Small and light. At about 8 oz it is easy to hide in a frame or battery area. A smaller controller also means less clutter in a conversion kit.
What you need to set it up
The X6F does not come with a screen or an app built in. HPC's product page says it requires either a Nucular display or the Nucular Bluetooth module for programming, so plan on one of these:
| Part | Price | What it does |
|---|---|---|
| Nucular Tech On-Board Computer 2.0 | $130 (Revolution plug-and-play version $150) | Handlebar display, and the tool you program the controller with |
| Nucular Controller Bluetooth Module | $35 ($45 with CAN wire) | Android and iOS app configuration, can be used instead of the display |
| Nucular Universal Thumb Throttle / Regen Lever | $28 | Plug-and-play throttle or regen control |
The module can be used on its own or alongside the display, which gives you both a handlebar view and phone tuning. See Tune Wirelessly: The Nucular Bluetooth Module for what the app adds.
How the pieces connect
This section sticks to what HPC's product pages state. For anything beyond it, such as pin-outs and power-lead sizing, follow Nucular's own manuals and ask HPC before you cut wire.
- CAN bus links the accessories. The Bluetooth module connects to the CAN bus and has two CAN ports. If you order the controller together with the module, a 1.2 meter (47 inch) CAN wire for the connection is included with the controller.
- Running a display and the module together. If the kit will also include the On-Board Computer, you need to order an additional CAN wire (PHD to PHD) from the accessories section. The module's Add CAN Wire option is there for that reason.
- The display kit includes connectors. The On-Board Computer 2.0 comes with a GoPro-style fork mount, four PHD 2.0 4-pin connectors, one 6-pin, one 8-pin and 26 crimp pins, so you can build harnesses to suit your bike.
- Throttle and brake inputs. The thumb throttle / regen lever has a 40 cm (about 15.7 inch) lead crimped with a PHD 2.0 4-pin connector. It plugs into the THR (throttle) or BRK (brake) port on the On-Board Computer, so one lever can serve as a throttle or as a modular regen control. Read Add Regen Braking for more.
- Bluetooth module power. It runs from 8 to 15V, is Bluetooth 5.0, and measures 50 x 18 x 9 mm.
Which HPC builds use the X6F
As of October 2026, HPC has moved every new build and every conversion kit to the Nucular X6F. It replaces the previous-generation HPC 2000W and 3000W sine wave controllers. In practice that means:
- New HPC builds: ship with the X6F. If you are ordering a specific model, confirm the exact controller and display on your order with HPC, since product pages for some older models still describe earlier hardware.
- Conversion kits: the High Performance Hub Motor Conversion Kit is built with it. The kit page lists a programmable motor controller matched to your power package. Our kit guide covers contents, speed and range.
- Existing riders: if you own a previous-generation HPC controller and want to move up, contact HPC to work out what your setup needs.
Why HPC switched, and how the old and new controllers compare line by line, is covered in Nucular X6F vs Our Previous Controllers. If you are weighing it against a third-party controller, read the ASI BAC4000 vs Nucular X6F comparison. The product launch story is in Meet the Nucular X6F.
X6F or P24F?
When you need more than the X6F offers, Nucular's bigger controller, the P24F, is covered in Nucular P24F: Full Specs, Wiring and Which HPC Builds Use It. You can browse every option in the Controllers collection and the Nucular Tech electronics collection.
Availability
The X6F is an active product and currently shows a small number in stock. Stock changes quickly, so check the product page before you plan a build around it.
Ride responsibly
A controller rated for 15kW can take a bike far beyond the legal definition of an electric bicycle. Use power and speed limits that suit where you ride, keep street-legal settings on public roads and paths, and save full power for private land and closed off-road areas. Rules vary by location, so check yours. Our guide to street-legal fast e-bikes explains the classes.
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