⚙ Life Cycle Cost Analysis

PUMP & MOTOR REPLACEMENT OPTIMIZER

Determine the most economical time to replace your motor and pump-set — 30-year analysis
Users should prioritise lower-cost energy improvements before replacing pumps and motors. More details in the AEE® CIEP™ course.
© 2026 Albert Williams
Honeyguide Energy Engineering
All rights reserved
honeyguide.energy@gmail.com
Optimal Replacement Interval
—
Lowest 30-year lifecycle cost
Optimal Interval Total Cost
—
30-year accumulated cost at optimal interval
30-Year Total Cost
—
30-year replacement interval baseline
Savings vs 30yr Interval
—
By switching to optimal interval
IRR — Optimal vs 30yr
—
Return on incremental capital invested
Energy Share of LCC
—
% of 30yr baseline spent on energy
Months Energy = Capital
—
Yr-1 monthly energy to recover pump+motor cost
30yr Energy vs Capital
—
Times 30yr energy exceeds new pump+motor capital
System Parameters
💱 Currency
⚠ Critical User Inputs These parameters drive all calculations — enter your actual system values before reviewing results
Motor Output (Shaft) Power
kW
Electrical input: — kWe (shaft ÷ motor η)
Motor Efficiency — Year 1
%
Pump Efficiency — Year 1
%
Operating Hours / Year (Year 1)
h/yr
Electricity Cost — Year 1
$/kWh
Electricity Escalation Rate / Year
%/yr
Motor Replacement Cost
USD
Pump Replacement Cost
USD
▶ Default Values — change only if known
Motor Eff. Degradation / Year
%/yr
Pump Eff. Degradation / Year
%/yr
Operating Hours Increase / Year
%/yr
Interest / Discount Rate
%/yr
Motor Maintenance — Year 1 (% of cost)
%
Pump Maintenance — Year 1 (% of cost)
%
Salvage / Resell Value by Equipment Age  % of replacement cost recoverable when selling
↺ Reset to defaults
Calculating…
Life Cycle Cost by Replacement Interval — Ranked Lowest to Highest  ⭐ = Optimal
Interval
Relative Cost
30yr Total
Savings vs 30yr Interval
Accumulated 30-year lifecycle expenses by category for four key intervals. Salvage credits excluded (income items, not expenses).
Cumulative Expense Components Over 30 Years — Optimal Strategy
Annual Cost by Strategy — All Replacement Intervals
· Click chips to toggle individual intervals
Annual Cost Breakdown — Energy + Maintenance (30-Year Replacement Interval)
Cumulative Life Cycle Cost — Selected Replacement Intervals (30 Years)
30-Year Total Cost by Replacement Interval
Cumulative Savings vs 30-Year Replacement Interval
Detailed 30-Year Cost Comparison — All Intervals
Replacement Interval# Replacements in 30yr30yr Accumulated CostSavings vs 30yr Interval
Motor & Pump Efficiency — 30-Year Interval (dashed) vs Optimal Replacement (solid)
Annual Energy Consumed (kWh) — 30-Year Interval vs Optimal Replacement Interval
Year-by-Year Data (🟧 = replacement year | 🟩 = lowest 30yr cumulative)