A mining profitability model needs an all-in energy assumption. The simple calculation—power draw in kW multiplied by hours and the applicable rate—becomes misleading when it ignores hosting charges, cooling needs, outages and the difference between an advertised tariff and the actual billed rate.
Cost inputs to separate
| Input | Question |
| Machine power draw | Is this measured at the intended operating mode? |
| Electricity rate | Does it include all relevant demand or site charges? |
| Hosting fee | Which maintenance, cooling or management elements are included? |
| Availability | What cost continues during downtime? |
Calculate the all-in cost per operating day
Start with the machine’s expected power draw and the hours it can realistically operate. Multiply that energy use by the actual contracted or billed rate, then add charges that are not included in the headline tariff. If a host manages the equipment, separate the power component from service, maintenance and administration fees. The formula can be simple, but its assumptions must be explicit enough to update when the invoice or operating conditions change.
| Cost category | What to verify | Why a headline rate may mislead |
| Energy | Rate, billing unit, minimums and applicable site charges | Advertised tariffs may exclude delivery or demand-related costs. |
| Hosting | Included services, repair process, suspension policy and term | Operational charges can sit outside the quoted power figure. |
| Cooling and environment | Responsibility for heat handling and operating limits | Heat-related downtime changes both output and maintenance needs. |
| Availability | Expected maintenance and outage allowance | A 24-hour calculation can overstate real operating time. |
Compare alternatives on the same basis
A lower electricity number is not automatically the lower operating cost. One offer may include monitoring and repairs, while another may bill them separately. One facility may have a shorter contract or clearer outage policy. Compare each option using the same planned operating hours, machine power draw, service scope and cost boundary. If a line cannot be priced, label it as an uncertainty instead of silently treating it as zero.
- Record the source and date for each power and hosting assumption.
- Calculate a base case with current conditions and an adverse case with higher cost or lower availability.
- Include installation, electrical work and transport if they are paid outside the monthly bill.
- Ask how renewals, early termination and maintenance are charged.
- Set a date to compare the model with actual invoices and uptime.
Uptime is part of the energy question
Energy cost and uptime interact. An idle unit may stop consuming its normal load, but it also stops producing output while fixed hosting or contract costs can continue. Frequent restarts, thermal limits or unstable connectivity can therefore matter as much as the tariff. Keep an operating log that makes outages visible rather than relying only on estimated dashboard results.
Use invoices to challenge the model
After a billing cycle, compare expected energy use, actual charges, service fees and availability against the worksheet. A discrepancy is not automatically an error, but it is a signal to learn which assumption was incomplete.
Recalculation trigger
Recalculate after a rate change, equipment issue, hosting renewal or material shift in operating conditions. Cost assumptions are not permanent simply because they were correct when the machine was bought.
Conclusion
Energy is an operating input, not a footnote. A reliable mining decision makes its electricity and hosting assumptions visible and revisits them when reality changes.
Build an invoice comparison record
Keep the invoice, meter or host report, and operating log for the same dates together. Note whether the amount represents energy consumed, a fixed facility fee, a service charge or an adjustment from an earlier period. When a billed total differs from the model, trace each component before changing the forecast. A single month may include unusual downtime or a one-time charge, so document the reason instead of copying the result forward without context.
Use one worksheet row per machine or hosting arrangement. Include the unit, billing period, energy reading, effective rate, fixed fees, uptime and source document. If a charge cannot be assigned to a specific machine, show how it was allocated. This keeps the comparison explainable when equipment is added, moved or taken offline.
Separate measured facts from assumptions
Mark measured draw and actual invoices differently from supplier specifications and future estimates. State whether the model assumes full operation, planned maintenance or a conservative availability level. When changing one input, hold the others constant so that the effect is visible. The model does not forecast network conditions or guarantee revenue; it is a way to understand how local operating costs respond to a changed rate, schedule or service agreement.
