Every estimate starts with visible assumptions.

Core bill calculation

Energy charge = monthly kWh × energy rate. Demand charge = billed peak kW × demand rate. We add fixed charges, then apply the tax or surcharge percentage entered by the user.

Load factor

Load factor = monthly kWh ÷ (peak kW × billing days × 24). It describes how consistently a facility uses its available peak load. A lower figure can indicate short, expensive peaks, but the right interpretation depends on the business.

Peak-shaving comparisons

Solar peak offset uses system kW multiplied by the user-selected coincidence with the billing peak. Battery offset is limited by both battery power and usable energy across the discharge window. Savings multiply the estimated kW reduction by the entered demand rate.

Rate data

State benchmarks are May 2026 commercial-sector average retail prices from the U.S. Energy Information Administration. They combine many utilities and customer classes, so they are a starting point—not a substitute for the tariff printed on a bill.

Source: U.S. EIA Electricity Data Browser.

Important limitations

• Ratchets, coincident peaks, riders, minimum bills, and tiered tariffs may not be represented.
• Industry presets are illustrative starting points, not measured benchmarks for a specific property.
• Solar and battery results exclude degradation, losses, financing, incentives, and installation cost.
• Confirm decisions with the serving utility and a qualified energy professional.