Bitmain
Antminer S21 Imm. HEM 301T
AvailableNew
- Hashrate
- 301TH/s
- Power
- 5,569W
- Efficiency
- 18.5J/TH
- Immersion
- SHA-256
Price on request
Picture of the model. The unit you receive may differ in appearance.
MicroBT WhatsMiner M66S 286 TH/s Bitcoin Miner
The WhatsMiner M66S 286T is an immersion Bitcoin miner from MicroBT, rated at 286 TH/s and 5,291 W (18.5 J/TH). It runs on 380–480 V power.
- Hashrate
- 286TH/s
- Power
- 5,291W
- Efficiency
- 18.5J/TH
- Cooling
- Immersion
- Coins
- BTC
- Input voltage
- 380–480 V
Versions of this model
- 286 TH/s
- 290 TH/s
Retail price
$2,445.30
per unit · $8.55 per TH/s
- 1–4 units$2,445.30
- 5+ unitsVolume pricing available
View volume pricingVolume pricing
| 1–4 units | $2,445.30 |
|---|---|
| 5–19 units | Volume pricing on request |
| 20–99 units | Request Quote |
| 100+ units | Contact Mining Sales |
- Ships in
- 5–10 business days
$2,445.30Free standard shipping. Excludes duties and taxes
- Manufacturer
- MicroBT
- Model
- M66S 286T
- Algorithm
- SHA-256
- Condition
- New
Product overview
The WhatsMiner M66S 286T is an immersion Bitcoin miner from MicroBT, rated at 286 TH/s and 5,291 W (18.5 J/TH). It runs on 380–480 V power.
Condition: New.
286 TH/s
Rated hashrate
18.5 J/TH
Energy per terahash
Immersion
Cooling method
5,291 W
Power draw at the wall
Technical specifications
Specifications as published by the manufacturer · last verified October 1, 2026 · MicroBT documentation
Fields the manufacturer does not publish are left out rather than estimated.
Performance
| Hashrate | 286 TH/s (±10%) |
|---|---|
| Power consumption | 5,291 W |
| Efficiency | 18.5 J/TH |
| Algorithm | SHA-256 |
| Supported coins | BTC |
Power & electrical
| Input voltage | 380–480 V AC |
|---|---|
| Power connection | Custom made, ≥ 16 A |
Cooling
| Cooling type | Immersion |
|---|---|
| Immersion compatible | Yes |
| Coolant inlet temperature | 25–55 °C |
| Coolant flow | ≥ 24 L/min |
| Coolant | Insulating liquid (S5X/S3X) |
Physical & environment
| Net weight | 16 kg |
|---|---|
| Gross weight | 17 kg |
| Storage temperature | -40–70 °C |
Connectivity
| Network interface | Ethernet |
|---|
General
| Manufacturer warranty | one-year warranty period |
|---|
Mining economics
Estimate output and operating cost for the WhatsMiner M66S 286T at your own power price. Results are calculations from the inputs shown, not a forecast.
Estimated results (per miner, at $0.06/kWh)
- Est. revenue / day
- $10.15
- 0.00012590 BTC mined / day
- Electricity cost / day
- $7.62
- 127 kWh × $0.06
- Operating result / day
- $2.53
- Revenue less electricity
- Revenue / 30 days
- $304.59
- Electricity / 30 days
- $228.57
- Operating result / 30 days
- $76.01
- Energy / day
- 127 kWh
- Energy / 30 days
- 3,810 kWh
- Break-even electricity
- $0.080/kWh
Estimates only. Not financial advice. Results vary with network difficulty, pool fees, uptime, market conditions, the Bitcoin price and the cost of electricity. They are calculated from the inputs shown at constant difficulty and price, and leave out the cost of the hardware, cooling, downtime, taxes and depreciation.
Network data as of 2026-10-28 13:00 UTC · price: mempool.space · difficulty: mempool.space · block reward 3.1391 BTC
Electricity cost by power price
Daily and 30-day electricity cost of WhatsMiner M66S 286T at 5,291 W, with the estimated revenue beside it.
| Electricity price | Electricity / day | Electricity / 30 days | Est. revenue / day | Est. net / day |
|---|---|---|---|---|
| $0.03/kWh | $3.81 | $114.29 | $10.15 | $6.34 |
| $0.05/kWh | $6.35 | $190.48 | $10.15 | $3.80 |
| $0.06/kWhselected | $7.62 | $228.57 | $10.15 | $2.53 |
| $0.07/kWh | $8.89 | $266.67 | $10.15 | $1.26 |
| $0.10/kWh | $12.70 | $380.95 | $10.15 | -$2.55 |
| $0.12/kWh | $15.24 | $457.14 | $10.15 | -$5.09 |
| $0.15/kWh | $19.05 | $571.43 | $10.15 | -$8.89 |
| $0.20/kWh | $25.40 | $761.90 | $10.15 | -$15.24 |
Compare miners
How the WhatsMiner M66S 286T compares with the closest alternatives by cooling type and efficiency.
| Model | Hashrate | Power | Efficiency | Cooling | Price | $/TH | Side by side |
|---|---|---|---|---|---|---|---|
| WhatsMiner M66S 286T (this miner) | 286 TH/s | 5,291 W | 18.5 J/TH | Immersion | $2,445.30 | $8.55 | |
| Antminer S21 Imm. HEM 301T | 301 TH/s | 5,569 W | 18.5 J/TH | Immersion | On request | — | Side by side |
| Avalon A1566I 273T | 273 TH/s | 4,959 W | 18.2 J/TH | Immersion | $1,607.97 | $5.89 | Side by side |
| Avalon A1566I 249T | 249 TH/s | 4,500 W | 19 J/TH | Immersion | $1,994.05 | $8.01 | Side by side |
| WhatsMiner M66 276T | 276 TH/s | 5,492.4 W | 19.9 J/TH | Immersion | $2,097.60 | $7.60 | Side by side |
Shipping
Standard shipping is free to every destination we ship to. If you need it faster, choose express shipping at checkout and we quote it before you pay. Import duties, taxes and customs clearance are set by the destination country and are the importer's responsibility unless your quotation states otherwise.
- Gross weight
- 17 kg
Documentation
Links open the manufacturer's own documentation on the manufacturer's website.
WhatsMiner M66S 286T questions
How much electricity does the WhatsMiner M66S 286T use?
The WhatsMiner M66S 286T draws 5,291 W at the wall. Running continuously that is about 127 kWh per day and 3,810 kWh per 30 days. Multiply by your electricity price to get the running cost, or use the calculator.
What is the hashrate and efficiency of the WhatsMiner M66S 286T?
Rated hashrate is 286 TH/s (±10%) at 18.5 J/TH. Lower J/TH means less energy per unit of hashrate. See Understanding J/TH.
What voltage does the WhatsMiner M66S 286T need?
Input voltage is 380–480 V AC. It cannot run on a 110–120 V household circuit. Confirm your supply, breaker and cabling with a qualified electrician before ordering. See Bitcoin miner power requirements.
How is the WhatsMiner M66S 286T cooled?
The WhatsMiner M66S 286T is built for immersion cooling: it runs submerged in dielectric fluid inside a tank and has no fans. Compare options in Air vs hydro Bitcoin miners.
Can I order the WhatsMiner M66S 286T in bulk?
Yes. Orders are handled by quantity: small quantities through checkout when a price is published, and larger quantities by quotation with pricing, batch and logistics confirmed by sales. Request a wholesale quote.
Similar miners
The closest alternatives by cooling type and efficiency.
Canaan
Avalon A1566I 273T
AvailableNew- Hashrate
- 273TH/s
- Power
- 4,959W
- Efficiency
- 18.2J/TH
- Immersion
- SHA-256
$1,607.97$5.89/TH
Canaan
Avalon A1566I 249T
AvailableNew- Hashrate
- 249TH/s
- Power
- 4,500W
- Efficiency
- 19J/TH
- Immersion
- SHA-256
$1,994.05$8.01/TH
MicroBT
WhatsMiner M66 276T
AvailableNew- Hashrate
- 276TH/s
- Power
- 5,492.4W
- Efficiency
- 19.9J/TH
- Immersion
- SHA-256
$2,097.60$7.6/TH
Wholesale & project supply
Need the WhatsMiner M66S 286T in volume?
Send quantity, destination and required date. Sales replies with batch availability, unit pricing and freight options for your order size.
- 20+ units
- Mixed models
- Container orders
- Project procurement
WhatsMiner M66S 286T
$2,445.30