Electronics & energy
Appliance standby annual cost
Appliance standby annual cost: Annual cost = watts × hours/day × devices × 365 ÷ 1,000 × tariff.
Electronics & energy — Page 2
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Electronics & energy
LED lighting upgrade payback
LED lighting upgrade payback: Payback years = upgrade cost ÷ annual electricity saving.
Electronics & energy
Power factor correction kVAr
Power factor correction kVAr: Required capacitor kVAr = kW × (tan acos(old PF) − tan acos(target PF)).