What This Calculator Measures

Estimate peak shaving potential with load shifts, storage, and off-peak usage.

By combining practical inputs into a structured model, this calculator helps you move from vague estimation to clear planning actions you can execute consistently.

This calculator estimates how much peak demand you can shave with shifts and storage.

How to Use This Well

Enter peak load and shiftable load.
Add storage support and peak hours.
Set peak and off-peak rates.
Review peak reduction.
Adjust shift strategy.

Formula Breakdown

Peak reduced = peak − shift − storage

Shift: moved load.

Storage: battery offset.

Savings: rate delta × kWh.

Worked Example

6 kW peak with 2 kW shift and 1.5 kW storage.
Reduced peak = 2.5 kW.
3 peak hours yields strong savings.

Interpretation Guide

Range	Meaning	Action
0–15%	Low shift.	Limited savings.
16–35%	Moderate shift.	Good savings.
36–55%	High shift.	Strong peak control.
55%+	Major shift.	Excellent peak shaving.

Optimization Playbook

Shift heavy loads: move EV charging.
Use storage: discharge during peak.
Monitor rates: update utility rates.
Repeat monthly: track savings.

Scenario Planning

Baseline: current peak load.
More shift: add 1 kW shiftable load.
More storage: add 0.5 kW storage.
Decision rule: target 30% peak reduction.

Common Mistakes to Avoid

Ignoring battery power limits.
Overestimating shiftable loads.
Using outdated rates.
Forgetting peak hours length.

Implementation Checklist

Identify shiftable loads.
Set peak hours and rates.
Calculate peak reduction.
Monitor real savings monthly.

Measurement Notes

Treat this calculator as a directional planning instrument. Output quality improves when your inputs are anchored to recent real data instead of one-off assumptions.

Run multiple scenarios, document what changed, and keep the decision tied to trends, not a single result snapshot.

Home Energy Peak Shaving Calculator

Quick Facts

Your Results

Peak Plan