Antminer S21+ Solo Mining Setup

Last updated: April 11, 2026 Hardware guide

The Bitmain Antminer S21+ is one of the most powerful SHA-256 ASIC miners available, delivering 235 TH/s at 3,877W (16.5 J/TH). This guide covers how to configure it for solo mining on SoloFury.

Step 1: Access Miner Web Interface

Connect to your Antminer's web interface via its IP address in your browser. Default credentials are usually root / root.

Step 2: Pool Configuration

Navigate to Miner Configuration or Pool Settings. Enter:

Pool 1: stratum+tcp://bch.solofury.com:7070
Pool 2: stratum+tcp://bch.solofury.com:7071
Pool 3: stratum+tcp://bch.solofury.com:7072

Worker: YOUR_BCH_ADDRESS.S21Plus
Password: x

For European miners: Replace bch.solofury.com with eu-bch.solofury.com

For Asian miners: Replace bch.solofury.com with asia-bch.solofury.com

Step 3: Choose Your Coin

The S21+ can mine any SHA-256 coin on SoloFury. Replace the pool URL based on your choice:

Coin	Pool URL	Ports
BTC	`btc.solofury.com`	6060, 6061, 6062
BCH	`bch.solofury.com`	7070, 7071, 7072
BC2	`bc2.solofury.com`	8080, 8081, 8082
BCH2	`bch2.solofury.com`	8585, 8586, 8587
XEC	`xec.solofury.com`	9090, 9091, 9092

Step 4: Firmware Settings

AsicBoost: Should be enabled by default on S21+. SoloFury supports version-rolling for ~15-20% efficiency gain.
Firmware: Bitmain Stock, BraiinsOS, VNish, and LuxOS are all compatible.
Power mode: Use normal mode for best reliability. Low power mode reduces hashrate but saves energy.

Step 5: Verify Connection

After saving, wait 1-2 minutes. Check:

Miner status shows "Connected" and accepted shares increasing
Your worker appears on the SoloFury dashboard
0 rejected/invalid shares

Specifications

Spec	Value
Hashrate	235 TH/s
Power	3,877W
Efficiency	16.5 J/TH
Algorithm	SHA-256
Cooling	Air (4 fans)
Noise	~75 dB

Use the interactive configurator

Solo Start →