Antminer L7 Power Consumption: Wall Draw and Circuit Sizing

The Antminer L7 is rated at 3425 W, and a metered reading at the wall commonly sits a few percent higher once fans reach full duty in a warm room. Always size circuits, PDUs and utility planning on measured draw plus headroom rather than on the datasheet figure.

3425 W nominal, 3600 W+ observed, 20 A at 240 V. Over a month, the difference between nameplate and real draw is a meaningful line on your electricity bill and it is the number your payback model should use.

Plan a dedicated 200-240 V circuit per machine, sized for continuous duty with the standard eighty percent derating applied. For a 3425 W-class load that typically means a 20 A circuit at 240 V. Use properly rated PDUs, never daisy-chain, and have a licensed electrician verify the design.

Above a handful of machines, three-phase 208 V distribution balances load across phases and reduces conductor cost. Get the distribution design right at the start; retrofitting it around installed machines is expensive and disruptive.

Intake and exhaust fans, filtration, and on liquid systems the pumps and dry coolers all draw power that is invisible in machine specifications but very visible on the bill. Add ten to fifteen percent to the sum of your nameplates for a realistic site-level figure.

That overhead is also what your utility uses for demand charges, which on commercial tariffs can dominate the energy charge itself. Read your tariff carefully — the headline cents per kilowatt hour is rarely the whole story.

Firmware that exposes voltage and frequency lets you set a power target rather than accepting the factory point. Underclocking to fit available amperage is often more profitable than buying fewer machines, because efficiency per terahash typically improves as voltage drops.

Run the comparison explicitly: total site hashrate with four machines at full power versus six machines underclocked to the same total draw. The second configuration frequently wins on output and always wins on thermal margin.

Install per-circuit metering so you can reconcile machine-level consumption against the utility bill each month. Unexplained drift usually means a failing PSU, a fan running at maximum duty, or a machine throttling against poor airflow.

Reconciling monthly turns electricity from a fixed cost you accept into a variable you manage, and it is the fastest way to find the quiet inefficiencies that erode margin across a fleet.

The failure mode in this market is almost never the hardware — it is the transaction. Insist on a named legal entity, a verifiable phone number, a written warranty term, an invoice issued before funds move, serial numbers photographed on the machines you are actually buying, and a test report showing hashrate and per-board temperatures from a real bench run.

Every machine referenced here is listed on our catalogue with a live price, a bench-test report and a photograph of the actual unit, so you can move from this guide to a checkout in two clicks. Crypto, CashApp, Chime and bank transfer are all accepted, and orders ship worldwide from our Hong Kong warehouse to the USA, Canada, Europe, Asia, the Middle East, Latin America and Australia.

We ship air freight via DHL and FedEx with full commercial invoices, HS codes and, where relevant, EORI and VAT documentation for EU and UK buyers. Typical door-to-door transit is three to seven business days to North America and Europe, with sea freight available for container-scale orders where the freight saving justifies the longer timeline.

Deployment support does not stop at delivery. Send us your panel schedule, ambient conditions and pool preference and we will return a circuit plan, a firmware recommendation and a monitoring configuration so the fleet earns from the first day rather than the second week.