Bitmain Antminer T21 ‘Transformer’

Brand New Bitmain Antminer T21 ‘Transformer’Antminer T21 is one of the most affordable Bitcoin miners that runs at sub 20J/T efficiency. Yet its direct 3 phase ~400V power requirement, makes it impractical for many miners. We modified the Bitmain Antminer T21 to run on single phase 240V power, by swapping stock PSU with APW12, new power bus bars & custom designed 3D Printed PSU cover. We are calling this Antminer T21 Transformer.This is a plug & play Bitcoin miner that runs at 170T | 3230Watts | 19J/T on single phase 240V. Ships with Vnish FirmwareComes with APW12 PSU , stock APW11 PSU & power bars are not includedSpecificationsProduct Glance ModelT21 TransformerAlgorithm | CryptocurrencySHA256 | BTC/BCH/BSVHashrate, TH/s170 Power on wall @25°C, Watt3230Power efficiency on wall @25°C, J/TH19.0Detailed Characteristics Power Supply Power supply AC Input voltage, Volt(1-1)200~240Power supply AC Input Frequency Range, Hz47~63Power supply AC Input current, Amp(1-2)20(1-3)  Hardware Configuration Networking connection modeRJ45 Ethernet 10/100MMiner Size (Length*Width*Height, w/o package),mm(2-1)400*212*290Miner Size (Length*Width*Height, with package),mm570*316*430Net weight, kg(2-2)14.4Gross  weight, kg(2-2)16.1Noise, dBA @25°C (2-4)76Environment Requirements Operation temperature,°C0~45Storage temperature,°C-20~70Operation humidity(non-condensing) , RH10%~90%Operation altitude, m(3-1)≤2000  Profitability Calculator T21 Transformer Kit Installation Guide Antminer T21 Transformer Kit Installation Guide Frequently Asked Questions Do you provide setup support? If you need setup support beyond the available instructions provided, we offer one-on-one setup/consulting services that can be purchased separately from our consulting page. We would be happy to guide you through the process. Is the original Antminer T21 PSU included with the miner? T21 PSU is not included with the miner. This comes with APW12 PSU that is commonly found on Antminer S19 series.  Does this have any warranty? Like everything else in our store, this comes with our 14 day Altair Warranty. Please be aware that this modification voids Bitmain’s warranty Can I run stock Antminer firmware on this miner? Stock Antminer firmware does not allow running Antminer T21 on APW12.  What's the dev fee on Vnish firmware? This miner ships with our white label copy of Vnish firmware that charges 2.8% fees. Can I load another firmware like LuxOS or BraiinsOS on this miner? The T21 operates well utilizing VNISH and LuxOS. It does not run on BraiinsOS.  Can I overclock this miner? We recommend staying under 175T hashrate for this miner. APW12 PSU can not provide enough power to support higher hashrates. This can damage the APW12 PSU as well as the receptacle or PDU it is connected to. Can I underclock this miner? Yes, this can be underclocked down to about 100T hashrate via Vnish firmware webUI.  Can I run this on Mara UCB 2100? Yes, we have tested and it works.  I purchased the conversion kit but I'm unable to load aftermarket firmware on my miner. Can you help? We recommending Vnish firmware for running T21 on single phase power. Basic outline of firmware installation is listed on our firmware page. Firmware installation procedure is dependent on your control board type, existing firmware type, existing firmware version and other factors. Aftermarket firmware installation is customer’s responsibility. We do offer remote firmware installation via our consulting service, that can be purchased seperately.