Port
€157,50
- Control from the app. Start, stop, set power levels and watch everything in real time.
- Up to 4 miners from one Port. Or even more by adding network switches.
- Plug and play. Pairs over Bluetooth and finds your miners automatically, ready in minutes.
- Time-based automations. Schedule when your miners run by time of day or day of week, to match your solar hours or cheaper tariff windows.
Create your bundle
Choosing your options
Condition: New vs Refurbished
Refurbished units are fully tested, professionally cleaned and come at a lower price, they perform like new. New units are factory-sealed and untouched. Both carry the same EU warranty.
Hashrate (TH/s)
How much computing power the miner has. More terahash means more Bitcoin earned, and a bit more electricity used. Running on free solar surplus, a higher hashrate simply puts more of that surplus to work.
Operating system
The firmware that runs the miner. Braiins OS is easier and more intuitive to operate, configure and troubleshoot, runs roughly 10% more hashrate (per Braiins' own specs) and more efficiently, gives you more configuration options, and reports errors in far more detail so problems are quicker to spot and fix. You can even change the power level without restarting the miner. It takes about a 2% fee on what you mine, and none at all if you pair it with the Braiins pool. Even with the fee, you still come out ahead. The stock Bitmain OS takes no fee at all. Bottom line: if you're not sure, go with Braiins OS for the support and ease of use, and only pick stock OS if you know what you're doing and want to tune the miners yourself to maximise revenue.
How we calculate
Formulas
BTC/day = (Hashrate / Network Hashrate) × 144 blocks × 3, 125 BTC
Your miner's share of the total network, multiplied by the daily block rewards. 144 blocks are mined per day, each worth 3, 125 BTC.
Revenue = BTC/day × BTC price
The BTC price is fetched live from the blockchain.info API and converted to your local currency.
Pays for itself = Product price / Monthly revenue
How many months of mining revenue it takes to cover the purchase price.
Scenarios
Conservative
BTC price −30%, difficulty −5%. (Shows scenario if conditions worsen)
Current (Live)
Today's actual BTC price and mining difficulty.
Optimistic
BTC price +100%, difficulty +20%. (Shows scenario if Bitcoin grows)
Important notes
- Electricity costs are not deducted. Actual profit depends on your local electricity rate.
- Mining difficulty changes roughly every 2 weeks. Higher difficulty means lower earnings.
- Pool fees (typically 1-2%) are not deducted. Most miners use a mining pool.
- The block reward halves approximately every 4 years. The next halving will reduce it from 3, 125 to 1, 5625 BTC.
- These calculations are estimates based on current network conditions. Actual earnings may vary. This is not financial advice.
Free shipping
30-day-return
5.000+ Satisfied customers
Product information
The 21energy Port is the central control hub for your Bitcoin mining setup. Connect your miners via Ethernet, and the Port takes care of the rest: automatic device detection, real-time monitoring, and full control over every miner from a single interface. Manage everything through the 21energy app, Home Assistant, or the built-in API. Just plug in and mine.
Port
What customers say
5, 000+ satisfied customers and trusted by thousands of homes across Europe.
Verified
The app (iOS) is well made and feels intuitive, the heater itself is very quiet even when running at its maximum power. I have using it for 5 days now and so far I'm very happy. I almost never write reviews but this company deserves to get recognition
Daniel Garcia
January 14, 2026
Verified
Excellent service as always! Thank you again 😊
JonnyW
February 5, 2026
Verified
Had an error at first but to be fair they did everything to rectify it and put it right and more
andrew ferguson
April 2, 2026
Verified
Perfect ! I receive everything and travel was long. Thx to all team !
Vivien Gaillard
January 8, 2026
Verified
Top Support 👍
Alex Tornyossy
March 23, 2026
Verified
all good, works well, good support.
Fredrik Åhslund
December 22, 2025
Verified
Ofen 2 is good product and there is a good service support. The product is well designed and well manufactured. I got a minor bug issue at the beginning with the thermostat. Support solved it very quickly with an update.
Jidé Jidé
December 4, 2025
Verified
Awesome Team. Had a great conversation with a customer service agent, helped me understand the inner workings of mining!
Remington Splettstoesser
September 24, 2025
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