Bitaxe Ultra
Original open-source solo miner running BM1366 chip. Quiet enough for a bookshelf. 5V barrel jack power, USB-C is for firmware only.
Open Source Hardware
This miner is built on open-source hardware designs — transparent schematics published for anyone to audit, modify, and manufacture. No vendor lock-in, no proprietary firmware, and community-verified security.
Every Bitcoiner who cares about decentralization should own open-source mining hardware. It is the ultimate expression of hardware sovereignty — no single company controls the design, the firmware, or your ability to mine.
Explore the Bitaxe Hub →Open Source Miners United
Open Source Miners United (OSMU) is the community movement behind open-source Bitcoin mining hardware. The designs were published openly, enabling permissionless manufacturing worldwide — ensuring no single entity controls mining hardware production.
D-Central participates in the OSMU ecosystem by assembling open-source miners, carrying Bitaxe-compatible accessories, and supporting builders from Canada.
Shop Open Source Miners →Manufactured by D-Central
This device is assembled and quality-tested by D-Central Technologies in Canada. D-Central builds open-source mining hardware and related accessories, including heatsinks, cases, stands, and power solutions.
When you buy from D-Central, you get a device prepared by a team that works directly with Bitcoin mining hardware. Units are tested before shipping and backed by Canadian technical support and ASIC repair experience.
Supporting manufacturers like D-Central is how open-source hardware achieves real decentralization — multiple independent producers worldwide, each building from the same open designs, ensuring no single entity controls the supply chain. Your purchase directly supports this mission.
Shop D-Central Miners →Built for Solo Mining
Solo mining means mining independently — no pool, no shared rewards. One lucky hash wins the entire block reward. Low-power miners like this one are perfect for solo mining: the electricity cost is negligible, so you can run 24/7 as a perpetual lottery ticket.
Every hash has an equal chance. Every hash counts.
Solo Mining Calculator →Profitability Calculator
| Period | Revenue | Electricity Cost | Profit |
|---|---|---|---|
| Daily | $0.01 | $0.03 | $-0.01 |
| Weekly | $0.10 | $0.18 | $-0.07 |
| Monthly | $0.44 | $0.76 | $-0.32 |
| Yearly | $5.31 | $9.20 | $-3.89 |
Heating offset estimates the value of heat replacing an electric space heater during heating season (~6 months/year in Canada). Actual savings depend on your heating setup and climate.
Solo Mining Estimate
Solo mining is a lottery. There is no guarantee of finding a block. These estimates are based on current network difficulty and your hashrate. Every hash has an equal chance.
Where to Buy the Bitaxe Ultra
D-Central Technologies
CanadaBitcoin Mining Hackers since 2016. Ships from Laval, Quebec.
Shop all Bitcoin mining productsASIC Miner Market
United StatesWide selection of new and used ASIC miners. US-based shipping.
Shop NowFull Specifications
| Model | Bitaxe Ultra |
| Model Number | Bitaxe Ultra |
| Manufacturer | D-Central |
| Algorithm | SHA-256 |
| Coins Mined | Bitcoin (BTC) |
| Hashrate | 500 GH/s |
| Power Consumption | 15 W |
| Efficiency | 30 J/TH |
| Noise Level | 35 dB |
| Chip Model | BM1366 |
| Chip Count | 1 |
| Cooling | Air |
| Voltage Range | 5V DC (barrel jack 5.5x2.1mm) |
| Operating Temperature | 0-50°C |
| Dimensions | 95x55x35 |
| Weight | 0.3 |
| Interface | WiFi |
| BTU Output | 51.2 BTU/hr |
| Equivalent Heater | Small personal heater (51 BTU/hr) |
| Daily Power Cost | $0.03/day |
| Monthly Power Cost | $0.76/mo |
| Circuit Requirement | Standard 120V 15A |
| Release Date | 2023-09-01 |
| MSRP | $79.00 |
| Status | Active |
Home Mining Assessment
Original open-source solo miner running BM1366 chip. Quiet enough for a bookshelf. 5V barrel jack power, USB-C is for firmware only.
The Bitaxe Ultra is a SHA-256 cryptocurrency miner manufactured by D-Central. It delivers a hashrate of 500 GH/s with a power consumption of 15W, achieving an efficiency of 30 J/TH.
Built on the BM1366 ASIC chip, uses air cooling, operates at 35 dB noise level, weighs 0.3 kg, measures 95x55x35.
With a home mining score of 70/100, this miner is well-suited for residential use. It produces 51.2 BTU/h of heat output, making it suitable for supplemental space heating.
At 30 J/TH, the Bitaxe Ultra sits in the previous-generation efficiency tier; it runs best where electricity is inexpensive, or as a dual-purpose heat source.
The Bitaxe Ultra is solo-mining capable, so you can point it at your own node or a solo pool for a shot at a full block reward, and its waste heat (around 51.2 BTU/h) can be ducted into a room, turning money you would otherwise spend on heating into hashrate.
View detailed specifications, real-time profitability calculations, and comparison data for the Bitaxe Ultra in our comprehensive ASIC miner database.
Open-source miner setup path
Match the board family, firmware, power supply, case, cooling, and solo-mining expectations before buying accessories or tuning.
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Common Bitaxe Ultra Error Codes
Known error codes and troubleshooting guides for the Bitaxe Ultra. Click any error for step-by-step repair instructions.
Bitaxe – AxeOS Connection Issues
All Bitaxe models: Supra (board 401), Ultra (202/204/205/207), Gamma / Gamma Turbo...
Bitaxe – ESP32 Crash Loop / Reboot Loop
All Bitaxe models (ESP32-S3 based): Max (BM1397), Ultra (BM1366 boards 202/204/205/207), Supra...
Bitaxe – Not Hashing / Zero Hashrate
Bitaxe Supra, Bitaxe Ultra, Bitaxe Gamma, Bitaxe Gamma Turbo (GT), Bitaxe Hex,...
Bitaxe – Overheating
Bitaxe Max, Ultra, Supra, Gamma, Gamma 601, Gamma 602, Gamma Turbo (GT),...
Frequently Asked Questions
What are the current mining economics for the Bitaxe Ultra?
At $0.07/kWh, the Bitaxe Ultra currently shows an estimated daily net cost of $0.01 before pool fees and hardware cost. Lower electricity rates, network changes, BTC price changes, or useful heat recovery can change the result.
Can I mine Bitcoin at home with the Bitaxe Ultra?
Yes, the Bitaxe Ultra scores 70/100 for home mining viability. It produces 35 dB of noise and draws 15W. It is suitable for home environments with appropriate placement considerations.
Can the Bitaxe Ultra heat my home?
The Bitaxe Ultra outputs approximately 51.2 BTU/hr of heat. For reference, a typical space heater produces 5,000-5,500 BTU/hr. All electrical energy consumed by the miner is converted to heat, making it 100% efficient as a heater. D-Central offers Bitcoin Space Heater builds designed specifically for home heating integration.
What power supply does the Bitaxe Ultra need?
The Bitaxe Ultra draws 15W of power. You need a power supply rated for at least 17W with appropriate voltage (5V DC (barrel jack 5.5x2.1mm)). D-Central stocks compatible power supplies in our shop. Always use a quality PSU from a reputable manufacturer to protect the miner and wiring.