import type { MotorEfficiencyInput, MotorEfficiencyResult } from './types.js';
/**
 * Calculate motor efficiency upgrade economics
 *
 * Annual energy = motor power (kW) * running hours * load factor / efficiency
 * Annual cost = annual energy * electricity rate
 * Annual savings = current annual cost - new annual cost
 * Payback period = upgrade cost / annual savings
 *
 * @param input - Motor efficiency input parameters
 * @returns Motor efficiency result with costs, savings, and payback period
 */
export declare function motorEfficiency(input: MotorEfficiencyInput): MotorEfficiencyResult;
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