How do you calculate energy cost per kg?

Multiply load by runtime to get kWh, multiply by the rate to get cost, then divide by kg processed. With 420 kW x 12 hr = 5,040 kWh, x $0.11 = $554.40, over 1,400 kg = $0.396/kg.

What is process energy used in this example?

5,040 kWh, from a 420 kW load running for 12 hours. That energy costs $554.40 at $0.11/kWh, or about $46.20 per hour of operation.

What is a good energy cost per kg for anode processing?

It varies widely by step; spheroidization and coating are far lower than graphitization, which can dominate. The $0.396/kg here is reasonable for a mid-temperature step but would be low for full graphitization.

Why use a blended electricity rate?

Bills combine energy, demand and time-of-use charges. A blended $/kWh rate captures your effective cost so cost per kg reflects what you actually pay, not just the headline energy charge.

How does constant-load assumption affect accuracy?

Furnaces draw heavily during heat-up and less during soak, so a flat 420 kW may over- or understate kWh. For high-stakes comparisons, use metered energy rather than load times runtime.

How can I use hourly energy cost?

At $46.20/hr you can compare scheduling a run during peak versus off-peak windows; shifting energy-intensive hours to cheaper rates directly lowers cost per kg.

Graphite, Anode & Battery Materials Processing calculator

Energy Intensity Calculator

Energy Intensity converts a battery-material process's connected load and runtime into total kWh, total electricity cost, and the cost per kilogram of anode material processed. Graphitization and high-temperature purification are among the most energy-hungry steps in battery manufacturing, so plant and process engineers track energy per kg to find the biggest lever on conversion cost. The calculator also returns hourly energy cost, which helps schedule energy-intensive runs against time-of-use rates. Because electricity can be the single largest variable cost in graphite processing, watching cost per kg per recipe is essential to staying competitive on anode pricing.

What this calculator does

Estimate energy intensity and energy cost per kg for graphite purification, milling, coating, calcination, drying, blending, or finished anode material production.
Use it when comparing process routes, furnace settings, dryer conditions, milling times, or production scale-up assumptions on a kWh-per-kg basis.
It computes process energy used in kWh, total energy cost, and energy cost per kg of anode material processed.

Formula used

Process energy cost = battery-material process load × process energy runtime × blended electricity rate
Energy cost per kg = process energy cost ÷ processed anode material

Inputs explained

Battery-material process load:
Process energy runtime:
Blended electricity rate:
Processed anode material:

How to use the result

Use it to benchmark recipes, evaluate furnace efficiency upgrades, or schedule loads against time-of-use electricity rates.
It assumes the process draws a constant load for the full runtime; real furnaces vary draw across heat-up, soak and cool, so a flat load can mislead.

Current U.S. benchmarks

As of Apr 2026, industrial electricity averages 8.7 cents per kWh across the U.S. (EIA), up 5.5% from a year earlier. State averages range widely, so plants should confirm against their own tariff.
The producer price index for copper and brass mill shapes stands at 559.593 (BLS, May 2026), up 76.8% from a year earlier. Quotes priced off last quarter's material cost miss this move. Global copper trades at $13,484 per tonne (IMF via FRED, May 2026).
The U.S. has 5,397 electrical equipment and appliances establishments employing about 369,437 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate energy cost per kg? Multiply load by runtime to get kWh, multiply by the rate to get cost, then divide by kg processed. With 420 kW x 12 hr = 5,040 kWh, x $0.11 = $554.40, over 1,400 kg = $0.396/kg.
What is process energy used in this example? 5,040 kWh, from a 420 kW load running for 12 hours. That energy costs $554.40 at $0.11/kWh, or about $46.20 per hour of operation.
What is a good energy cost per kg for anode processing? It varies widely by step; spheroidization and coating are far lower than graphitization, which can dominate. The $0.396/kg here is reasonable for a mid-temperature step but would be low for full graphitization.
Why use a blended electricity rate? Bills combine energy, demand and time-of-use charges. A blended $/kWh rate captures your effective cost so cost per kg reflects what you actually pay, not just the headline energy charge.
How does constant-load assumption affect accuracy? Furnaces draw heavily during heat-up and less during soak, so a flat 420 kW may over- or understate kWh. For high-stakes comparisons, use metered energy rather than load times runtime.

Last reviewed 2026-05-12.