Panel Capacity Calculator

Calculate your available electrical panel capacity based on historical meter data.

An implementation of National Electrical Code (NEC) 220.87 for homes with smart meter data.

Developed under this Grant from the California Energy Commission.

Adding new electric devices to your home?

Avoid the high costs and long delays of upsizing your electric panel!

Many homes have unused electrical capacity that can be safely used for new devices like heat pumps, electric vehicles, or induction stoves. This tool helps you determine your available capacity using your actual usage data, potentially saving you thousands of dollars in unnecessary panel upgrades.

Step 1: Upload Your Electric Usage Data

Import your smart meter data below

Drag and drop a CSV file with your energy usage data. Or click above to select it from your computer. Click the "Need help" button above to see supported formats.

or

Try running the calculator using one of these sample files:

Step 2: Panel Specifications

Step 3: Calculate