Energy Rate Disclaimer: Utility rate tiers reflect standard published TOU rate plans (e.g., California PG&E/SCE, ConEd NY, ERCOT TX, Arizona APS). Savings depend on actual household load profiles and seasonal tariff adjustments.
Home Energy Studio Peak Shaving • EV Off-Peak • Tesla Powerwall Arbitrage

Time-of-Use (TOU) Electricity, EV & Battery Arbitrage Calculator

Calculate monthly power bill savings from off-peak EV charging, appliance load shifting, and home battery peak shaving arbitrage.

1. TOU Utility Rate Tiers ($/kWh)

Tariff Schedule
$
$
$

2. Shiftable Monthly Energy Loads

kWh Consumption
~1,500 Miles / mo

3. Home Battery Peak Arbitrage

Tesla Powerwall
$
Estimated Monthly Electricity Bill Savings

$316.20 / mo

65.4% BILL REDUCTION
Unmanaged Peak Cost

$446.40

Peak Rate ($0.48)
Shifted Off-Peak Cost

$130.20

Off-Peak ($0.14)
Annual Savings

$3,794.40

12-Month Total
Battery Payback

4.5 Years

With 30% Tax Credit
10-Year Cumulative Wealth Created:

Invested bill savings compounded at 8.0% annual CAGR

$55,570.82

24-Hour TOU Rate Curve & Peak Arbitrage Window

Midnight → 4-9 PM Peak → Midnight
✨ AI Home Energy & Battery Arbitrage Strategist 100% Private AI

Click "Run AI Energy Arbitrage Audit" to evaluate smart thermostat pre-cooling strategies, Level 2 EV charging timers, and battery roundtrip degradation. 100% private to you—zero server access.

Zero Data Access: Home energy and utility inputs execute 100% locally on your device. Zero Server Access

Grid Economics & Smart Home Energy

The 4 PM–9 PM Utility Rate Trap: How Peak Shaving and Home Battery Arbitrage Eliminate 65% of Power Costs

An authoritative engineering guide to Time-of-Use rate spreads, Level 2 EV charging automation, and NEM 3.0 self-consumption.

The 3.5x Peak Rate Multiplier

Utilities like PG&E, ConEdison, and Southern California Edison charge up to $0.55 per kWh during On-Peak hours (4 PM–9 PM) compared to just $0.14 per kWh overnight. Plugging in an EV right when arriving home at 5:30 PM costs $19.25 per charge. Setting a 12:00 AM scheduled charging delay reduces that exact same charge to $4.90, saving over $1,400 annually with zero lifestyle change.

Frequently Asked Questions (TOU & Battery Arbitrage)

What is Time-of-Use (TOU) electricity pricing?

Time-of-Use (TOU) is a utility billing structure where electricity prices vary based on the time of day. Electricity is most expensive during "On-Peak" hours (typically 4:00 PM to 9:00 PM) when grid demand is highest, and cheapest during "Off-Peak" or "Super Off-Peak" overnight hours (12:00 AM to 6:00 AM).

How much money does scheduled EV charging save on TOU rates?

Charging an electric vehicle overnight during super off-peak hours ($0.12 to $0.15/kWh) instead of peak hours ($0.45 to $0.55/kWh) saves approximately $30 to $40 per 1,000 miles driven, resulting in $600 to $1,200 in annual fuel savings.

What is Home Battery Energy Arbitrage?

Energy arbitrage is the practice of charging a home battery (such as a Tesla Powerwall or Enphase 5P) with cheap off-peak or solar power during the day, and discharging that stored energy to power your home during expensive 4 PM to 9 PM peak utility hours, avoiding high grid rates entirely.