How to use the Peak Shaving Potential Calculator
The Formula
TOU tariffs charge more when the grid is stressed. Peak shaving moves flexible loads into cheap off-peak windows—same comfort, lower weighted $/kWh. Savings scale with your rate spread and how much peak energy you can reschedule.
Practical Example
Before = peak kWh × peak $/kWh + off-peak kWh × off-peak $/kWh. After moves (peak kWh × shift %) from peak to off-peak buckets. Monthly savings = before − after; annual = monthly × 12.
About Peak Shaving Potential Calculator
Why peak shaving matters
TOU tariffs charge more when the grid is stressed. Peak shaving moves flexible loads into cheap off-peak windows—same comfort, lower weighted $/kWh. Savings scale with your rate spread and how much peak energy you can reschedule.
Bill before vs. after
Before = peak kWh × peak $/kWh + off-peak kWh × off-peak $/kWh. After moves (peak kWh × shift %) from peak to off-peak buckets. Monthly savings = before − after; annual = monthly × 12.
Home vs. commercial
Homes usually optimize energy $/kWh. Businesses may also face demand kW charges—pair with Demand Charge Calculator when ratchets apply.
Frequently asked questions
Q: Different from TOU Shifting Savings? A: That tool takes shiftable kWh directly; this one starts from your peak/off-peak split and a shift %. Q: 100% shift realistic? A: Rare—HVAC and cooking often stay on-peak. Q: Super-off-peak tiers? A: Use your lowest overnight rate in off-peak field.