Reading Joules Per Terahash on a Korean Electricity Bill
How to translate bench J/TH figures into monthly kilowatt-hours using KEPCO tier blocks and realistic uptime assumptions.
Manufacturers advertise efficiency at the chip. Your breaker sees something else: PSU loss, fan overhead, and summer humidity.
Start With Wall Draw
Our audits measure at the circuit, not the internal meter. Take the reported watts at your target clock and multiply by hours online per month. That is your baseline kilowatt-hours before tariff multipliers.
Map KEPCO Blocks
Residential and commercial contracts use different seasonal tables. Pull the block that applies to your meter, not a neighbor’s commercial space. Night-heavy schedules may shift a meaningful share into lower blocks—model this explicitly instead of averaging.
Divide Hash by Cost
Once monthly kWh is priced, divide total terahash delivered in the same period. Compare models on cost per terahash, not cost per unit. A cheaper miner with higher J/TH can lose on a tight electricity budget.
When Bench and Meter Disagree
Five to eight percent variance is common from cable length and shared circuits. Beyond that, check for thermal throttling or pool downtime logged against uptime assumptions.
Book a modeling session if you want a spreadsheet wired to your actual bill PDF.