How does commercial battery peak shaving reduce electric utility bills?

Commercial BESS systems discharge during peak 15-minute facility power demand windows, reducing the maximum kW spike recorded by the utility meter and saving up to 50% on commercial demand tariff charges.

Does battery energy storage qualify for the federal ITC tax credit?

Yes, standalone commercial energy storage systems with a capacity of 5 kWh or greater qualify for the 30% Section 48 Investment Tax Credit (ITC) under the Inflation Reduction Act.

Commercial BESS Peak Demand Shaving & Battery Storage Sizer

⚡ 1. Facility Load & Utility Tariff

Facility Peak Load (kW)

Demand Charge Rate ($/kW/mo)

Target Peak Shaving (kW)

Battery Duration (Hours)

🔋 2. BESS Hardware & Efficiency

Turnkey Installed Cost ($/kWh)

Round-Trip Efficiency (RTE %)

Annual Degradation (%/yr)

Annual O&M Maintenance ($/kW-yr)

🏛️ 3. IRA Section 48 Clean Energy ITC

Standalone Energy Storage ITC Rate

Discount Rate for NPV (%)

Utility Tariff Escalation (%/yr)

📊 4. Storage Sizing & Financial Returns

15-Year Cumulative Net Present Value (NPV)

$462,800

IRR: 19.4% • Simple Payback: 4.8 Years

BESS Sized Capacity

1,200 kWh

300 kW (4-Hour Duration)

Annual Demand Savings

$88,200/yr

$7,350/mo utility bill credit

Gross Turnkey CapEx

$696,000

$580/kWh all-in installed

IRA Section 48 ITC Credit

-$278,400

40% Federal Tax Shield / Direct Pay

Net Out-of-Pocket CapEx (Post-ITC)

$417,600

Eligible for 5-Year MACRS Accelerated Depreciation

Metric Description	Underwritten Value
Monthly Peak Demand Reduction	300 kW
Effective Annual Usable Throughput	385,440 kWh/yr
Annual O&M Service Contract	$3,600/yr ($12/kW)
Net First-Year Operating Cash Flow	$84,600/yr
15-Year Cumulative Protected Cash Flow	$1,185,400