Field note
Seasonal power rates and mining schedules
In Korea’s humid summers, cooling can erase the advantage of an otherwise attractive energy rate. Scheduling full hash through every peak hour looks busy on a dashboard and expensive on the bill.
Mark the tariff seasons on a wall calendar
Print the months when your industrial rate steps up. Overlay known monsoon weeks. Operators who keep this calendar near the breaker panel make faster curtailment calls than those who reopen a PDF each afternoon.
Measure cooling as a percentage of IT load
If you lack a dedicated HVAC meter, estimate cooling from nameplate fan draw and dehumidifier runtime. During profitability analysis we treat a rising cooling percentage as a signal to shorten peak-hour mining, not to buy more machines.
Write curtailment rules before the heat arrives
Agree on wet-bulb or room-temperature triggers that pause the least efficient machines first. Cost monitoring checkups later compare how often those rules fired against the hours you planned in the break-even map.
Revisit after tariff renewal
When the power contract changes, schedule a short advisory even if the fleet is unchanged. Seasonal schedules that fit last year’s riders can quietly miss the new peak window.