📚 Energy calculators
The energy calculators cluster covers generation and grid performance math: capacity factor, availability factor, heat-rate thermal efficiency, renewable curtailment, T&D loss, load factor, peak-to-average ratio, forced outage rate, renewable share, energy intensity reduction, reserve margin, demand-response participation, SAIDI, self-consumption, battery round-trip efficiency, power factor, parasitic load, and pumped hydro cycle efficiency—each on a single-intent URL. Professional efficiency and manufacturing OEE availability live on their own hubs.
Run energy and utilities performance math in one place: capacity factor from actual MWh ÷ (rated MW × hours), availability factor, heat-rate thermal efficiency, renewable curtailment %, T&D loss %, electrical load factor and peak-to-average ratio, forced outage rate, renewable share, energy intensity reduction, plus Wave 2 tools for reserve margin, demand-response participation, SAIDI, self-consumption, battery round-trip efficiency, power factor, parasitic load, and pumped hydro cycle efficiency. Keep metering boundaries and period definitions identical to the calculator labels. Professional efficiency lives on the Professional efficiency page; manufacturing OEE availability lives on the Manufacturing hub—do not treat plant availability factor as OEE A. Electrical load factor here is average÷peak demand; logistics fleet load factor is cargo utilization on the Logistics hub.
Key facts
| Primary audience | Plant engineers, utility planners, renewables operators, and energy analysts |
|---|---|
| Core formulas | Capacity factor, availability, heat-rate, curtailment, T&D loss, load factor, FOR, reserve margin, DR %, SAIDI, self-consumption, battery RTE, power factor, parasitic %, pumped hydro |
| Category | Energy / utilities / generation / grid |
| Related hubs | Professional efficiency; Manufacturing (OEE availability); Logistics (fleet load factor) |
Definitions
Capacity factor
Actual MWh ÷ (rated MW × period hours) × 100—how hard a unit ran vs continuous rated output. Distinct from manufacturing plant capacity utilization.
Reserve margin
(Firm capacity − peak demand) ÷ peak demand × 100—resource adequacy headroom. Distinct from capacity factor.
SAIDI
Customer-minutes interrupted ÷ customers served—average interruption duration. Distinct from generating-unit forced outage rate.
Battery round-trip efficiency
Discharge MWh ÷ charge MWh × 100—storage cycle efficiency. Distinct from heat-rate thermal efficiency.
Formulas
- Capacity factor %: Actual MWh ÷ (Rated MW × Period hours) × 100
- Availability factor %: Available hours ÷ Period hours × 100
- Heat-rate efficiency %: (3412 ÷ Heat rate Btu/kWh) × 100
- Renewable curtailment %: Curtailed MWh ÷ Potential MWh × 100
- T&D loss %: (Generated − Delivered) ÷ Generated × 100
- Load factor %: Average load ÷ Peak load × 100
- Peak-to-average ratio: Peak load ÷ Average load
- Forced outage rate %: Forced outage hours ÷ Period hours × 100
- Renewable share %: Renewable MWh ÷ Total MWh × 100
- Energy intensity reduction %: ((Baseline − Current) ÷ Baseline) × 100
- Reserve margin %: (Firm MW − Peak MW) ÷ Peak MW × 100
- DR participation %: DR enrolled MW ÷ Eligible peak MW × 100
- SAIDI: Customer-minutes interrupted ÷ Customers served
- Self-consumption %: On-site consumed MWh ÷ On-site generated MWh × 100
- Battery RTE %: Discharge MWh ÷ Charge MWh × 100
- Power factor %: kW ÷ kVA × 100
- Parasitic load %: Auxiliary MWh ÷ Gross generation MWh × 100
- Pumped hydro cycle %: Energy out ÷ Energy in × 100
Comparison table
| Topic | Guidance |
|---|---|
| Capacity factor vs plant utilization | Capacity factor is energy÷(rated power×time); manufacturing utilization is output÷capacity quantity—different hubs. |
| Availability factor vs OEE availability | Energy availability is available÷period hours; OEE A is uptime÷planned production time on Manufacturing. |
| Load factor vs fleet load factor | Electrical load factor is average÷peak demand; logistics fleet load factor is cargo vs vehicle capacity. |
| Capacity factor vs reserve margin | CF measures energy produced vs rated continuous output; reserve margin is firm capacity headroom vs peak demand. |
| SAIDI vs forced outage rate | SAIDI averages customer interruption duration; FOR is generating-unit forced hours÷period. |
| Power factor vs capacity factor | Power factor is kW÷kVA; capacity factor is MWh÷(MW×hours)—different electrical concepts. |
| Battery RTE vs heat-rate efficiency | RTE is discharge÷charge for storage; heat-rate efficiency converts Btu/kWh to thermal %. |
| Parasitic load vs T&D loss | Parasitic is plant station service vs gross gen; T&D loss is network injected vs delivered. |
| Self-consumption vs renewable share | Self-consumption is site-used÷site-generated; renewable share is renewable÷total mix. |
| DR participation vs curtailment | DR participation is enrolled DR MW÷eligible peak; curtailment is unused renewable potential. |
| Load factor vs peak-to-average | Load factor is average÷peak (%); PAR is peak÷average (ratio)—reciprocal views of the same shape. |
| FOR vs availability | FOR uses forced outage hours; availability uses available hours—planned outages affect AF differently than FOR. |
Glossary references
Reinforce entities by pairing percent language with conversion pages when learners mix fractions, decimals, and ratios.
❓ Frequently Asked Questions
Is capacity factor the same as plant capacity utilization?
No. Manufacturing utilization is output÷capacity quantity. Capacity factor is actual MWh ÷ (rated MW × hours).
Is availability factor the same as OEE availability?
No. This hub’s availability factor is available hours ÷ period hours. Manufacturing OEE availability uses planned production time—see the Manufacturing hub.
Is load factor the same as logistics fleet load factor?
No. Electrical load factor is average÷peak demand. Fleet load factor on the Logistics hub is cargo utilization vs vehicle capacity.
Is SAIDI the same as forced outage rate?
No. SAIDI averages customer interruption duration on the distribution system. FOR is generating-unit forced outage hours÷period.
Is power factor the same as capacity factor?
No. Power factor is kW÷kVA. Capacity factor is energy÷(rated power×time).
Where is Professional efficiency?
Cross-link to Professional efficiency on the Professional hub when you need a general efficiency % outside plant heat-rate or intensity KPIs.
Do these replace ISO/RTO or GADS filings?
No. They compute educational formulas from your inputs—SCADA, ISO extracts, and regulatory definitions remain authoritative.