Air-cooled
Antminer S19j Pro
The workhorse. Cheap to buy, easy to service, parts everywhere. The right first machine.
Hashrate104 TH/s
Efficiency29.5 J/TH
Noise~75 dB
1,400+Machines commissioned
18 PH/sUnder management
72 hrsAvg. repair turnaround
180 daysRefurb warranty
Bitcoin Mining Hardware, Hosting & Repair
BTC Anvil supplies, converts, hosts and repairs ASIC mining hardware for operators running anything from ten machines in a workshop to a containerised site.
Buying a miner is the easy part. Keeping it hashing for four years — through heat, dust, unstable grids and a dead hashboard on a Sunday — is where the return is either earned or quietly lost. We are set up for that second part, and it is why customers who start with one machine end up buying racks.
Every unit that leaves this workshop has been bench-tested under load, hashboard-verified, firmware-cleaned and photographed. You receive the test report with the machine. If the report and the machine disagree when it reaches you, it comes back at our cost.
What We Do
- Supply — new and refurbished ASIC miners from vetted channels, single units through container loads.
- Convert — air-cooled units rebuilt onto liquid loops in-house, then commissioned before dispatch.
- Host — rack space, clean power, real cooling and hands on site, with per-machine monthly reporting.
- Repair — board-level diagnosis and repair of hashboards, control boards and power supplies.
- Build — power, airflow, water and network planned properly before a single machine is ordered.
Before You Buy Anything
Tell us your electricity price and how much capacity you have. We will tell you honestly what a machine earns at that tariff — including when the answer is “don't”. It costs us nothing and it has saved several customers a very expensive year.
Machines in Stock
Updated weekly · Prices on request
Stock rotates constantly. The table below is representative of what is usually on the shelf — ask for today's sheet for exact quantities, grades and pricing.
| Model | Hashrate | Efficiency | Power | Cooling | Condition | Availability |
|---|---|---|---|---|---|---|
| Antminer S19j ProBitmain | 104 TH/s | 29.5 J/TH | 3,068 W | Air | Refurbished | 12 in stock |
| Whatsminer M50SMicroBT | 126 TH/s | 26.0 J/TH | 3,276 W | Air | Refurbished | 3 left |
| Whatsminer M30S++MicroBT | 112 TH/s | 31.0 J/TH | 3,472 W | Air | Used, graded | Sold out |
| Antminer S19 XP HydroBitmain | 255 TH/s | 20.8 J/TH | 5,304 W | Liquid | New | 8 in stock |
| Antminer S21 HydroBitmain | 335 TH/s | 16.0 J/TH | 5,360 W | Liquid | New | 5 in stock |
| PSUs, hashboards & sparesS17 → S21 coverage | — | — | — | — | Bench-tested | From stock |
Air-cooled
Whatsminer M50S
Tougher PSU and better tolerance for dusty rooms and unstable grids. Our shop favourite.
Hashrate126 TH/s
Efficiency26 J/TH
Noise~75 dB
Hydro
Antminer S19 XP Hydro
Water-cooled, near-silent, no summer throttling. Requires a loop and a heat rejection plan.
Hashrate255 TH/s
Efficiency20.8 J/TH
Noise~50 dB
Every Machine Ships With
- A written bench report — hashrate under load, per-board chip count, PSU test, temperature curve, firmware version
- Clean, known firmware — no mystery builds, no hidden dev fees, no locked configurations
- Power cable and fittings appropriate to your region, fitted and tested
- 180-day workshop warranty on refurbished units, 90 days on repaired boards and PSUs
- A working phone number that reaches someone who has actually opened the machine
Services
Five things we actually do
Most sellers stop at the invoice. We are set up for the four years afterwards, which is where the money is either made or quietly lost.
01
Sales & Sourcing
New and refurbished ASICs from vetted channels, with an honest earnings estimate at your power price before you commit.
- Single units through full container loads
- Machine selection matched to your tariff, climate and available capacity
- Bench report and photographs supplied with every unit
- Delivery across Europe and the UK, customs paperwork handled
02
Hydro & Immersion Conversion
Air-cooled units rebuilt onto liquid loops in our workshop — quieter, cooler, longer-lived, and overclockable without cooking the boards.
- Full conversion kits for supported S19 and M50-class chassis
- Dry coolers, chillers, pumps and manifolds specified to your site
- Inline filtration and coolant service — the part everyone forgets
- Heat recovery for greenhouses, dryers and workshop heating
- Commissioned under load on our bench before dispatch
03
Hosting & Colocation
Rack space, clean power, real cooling and someone physically on site. You keep the keys and the payouts.
- Per-machine monthly reporting: uptime, hashrate, temperature, downtime causes
- Payouts go directly to your wallet — we never touch them
- Physical security, fire detection and 24/7 monitoring
- Spares held on the shelf, so a failure is hours not weeks
04
Repair & Refurbishment
Board-level diagnosis and repair. Fixed-fee, with a written pass/fail bench report either way.
- Hashboard repair at chip, PIC and voltage-domain level
- Control board recovery, reflash and IP rescue
- PSU rebuild and load-bank testing
- Full refurbishment: strip, clean, re-paste, re-test, re-certify
05
Farm Design & Buildout
Power, airflow, water and network planned properly the first time — from a ten-machine garage to a containerised site.
- Load calculations, distribution and breaker sizing
- Airflow or liquid loop design, and heat rejection planning
- Network, monitoring and remote management setup
- Install, commissioning and operator handover training
Why Liquid Cooling Wins
An air-cooled miner spends its life fighting its own exhaust. Put it on a loop and the fans go quiet, the boards run roughly 30 °C cooler, and the machine stops ageing itself to death. The trade-off is that you now own a plumbing system — which is exactly the part we build, commission and service.
| Air-cooled | Hydro / liquid | |
|---|---|---|
| Noise | 70–80 dB — needs its own building | 45–55 dB — tolerable indoors |
| Board temperature | High, and rises with room temperature | Stable, roughly 30 °C lower |
| Summer performance | Throttles when the room heats up | Unaffected if the loop is sized right |
| Density | Limited by airflow | Considerably higher per m² |
| Heat reuse | Difficult | Straightforward — usable hot water |
| Setup | Plug in and go | Needs a loop, a chiller and servicing |
The Repair Bench
Dead hashboard, chattering PSU, a controller that will not take an IP address — it comes to the bench, gets a full diagnosis, and you receive a written report whether we can save it or not.
No “send it back to China and hope”. Diagnosis is a fixed fee, credited against the repair if you proceed.
| Service | Typical turnaround | Warranty |
|---|---|---|
| Diagnosis & bench reportCredited against repair | 24 hours | — |
| Hashboard repairChip, PIC and voltage-domain level | 72 hours | 90 days |
| Control board recoveryReflash, IP rescue, component replacement | 48 hours | 90 days |
| PSU rebuildLoad-bank tested before return | 48 hours | 90 days |
| Full refurbishmentStrip, clean, re-paste, re-test, re-certify | 5 working days | 180 days |
Who We Work With
- First-time miners with cheap power and a spare room, who need someone to tell them the truth before they spend.
- Small operators running 10 to 100 machines who are losing money to downtime they cannot diagnose.
- Farm operators converting to hydro to raise density and cut noise complaints.
- Investors who want the hashrate without touching the hardware — hosting, reported monthly.
- Resellers and repair shops buying graded stock and spares in volume.
Frequently Asked Questions
Do you sell single machines, or only in bulk?
Both. Plenty of our customers start with one machine in a garage and end up with a rack. We price single units fairly, and we will tell you honestly if your power tariff makes it a bad idea.
What warranty comes with a refurbished miner?
180 days on units refurbished in our workshop, 90 days on repaired boards and power supplies. The warranty covers the work we did — not lightning strikes, floods, or a 40 °C room with no airflow.
Can you convert my existing air-cooled miners to hydro?
Yes, for supported S19 and M50-class chassis. Conversion is done in-house, tested under load on our bench, and shipped with the loop fittings ready. We will also specify the chiller or dry cooler you will need for your site.
What does hosting actually include?
Rack space, power, cooling, network, physical security and hands on site. You get per-machine monthly reporting, and your payouts go straight to your own wallet — we never hold them.
How do I know a used machine is not junk?
Every unit ships with a bench report: hashrate under load, per-board chip count, PSU test, temperature curve and firmware version. If the report and the machine disagree when it reaches you, it comes back at our cost.
Do you help with power, permits and the boring parts?
That is most of the job. Load calculations, distribution, breaker sizing, airflow, water and heat rejection are planned before anything is ordered — so you do not buy twenty machines you cannot legally run.
Where do you deliver?
Across Europe and the UK. Freight, insurance and customs paperwork are quoted with the machines so there are no surprises at the border.
Request a Quote
Tell us your power price and how much capacity you have. That is usually enough for us to come back with something useful.
A real person reads every message and replies within one business day — usually with questions, because the details matter. If you would rather talk, send “CALL” and a time and we will ring you.
- No automated sales sequence
- No pressure to buy today
- We will say so if the numbers do not work