Free deterministic standby-generator load calc & sizing (NEC 220 / NEMA MG-1 / IEEE 399). Models the motor-start transient that browns out a site. By GENERasic.
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Updated
Jul 23, 2026 - Python
Free deterministic standby-generator load calc & sizing (NEC 220 / NEMA MG-1 / IEEE 399). Models the motor-start transient that browns out a site. By GENERasic.
Pure, zero-dependency electrical engineering formulas: line current, kVA/kW/kVAr, power factor correction, voltage drop and cable sizing, generator sizing with motor starting, battery runtime with Peukert, transformer loading, AWG to mmآ².
US Residential Electrical, Solar PV, Battery Backup & Generator Sizing Formulas (NEC Reference)
Generator sizing calculator: load builder, motor-starting kVA, altitude/temperature derating, wet-stacking checks, fuel burn and 2026 code guidance for 12 industries, from farms to AI data centers. Built by zov911.com
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