Upload your usage information from the energy company to compute your demand charges.
Updated October 22, 2025: Demand charge is 14c, not 18c. The energy company has posted a new page on their website with more information.
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Visit the energy company's website, create or log in to your account. Place your mouse cursor over the "MyAccount" menu at the top, and the go down to "View Usage".
Scroll to the bottom of the page and click "Download Usage".
Choose a date range, ideally a full year to get a complete picture of how much the demand charge will cost you each month.
Enter your email address and click Submit. You will receive an email to return to this page and download the ZIP file when it has been prepared.
Once you receive the email, downloaded the data in a ZIP file format, and unzipped the files, choose the file ending in "_Demand.csv" to upload to this website.
Demand charges are a highly-complex way to calculate the burden placed on the grid by an electric service (e.g. your house, or office building).
To calculte a demand charge, first take a 24-hour day, and divide it into 15 minute segments, like 12:00 AM to 12:15 AM, or 4:30 PM to 4:45 PM.
For each of those 15 minute segments, calculate the average power used by the electric service. This can be done by multiplying the kWh used from the grid by four (because its a quarter of an hour).
Over the course of the day, find the maximum power used over all the 15 minute segments. Do this for each day of your billing cycle.
Multiple that power (kW) by 14c per kW, to find out the demand charge for the day.
For example, if you used a maximum of 8kW each day over a 30 day billing cycle, you would have 8kW times 14c ($1.12), times 30 days, is $33.60 per month.
While the energy company is planning on reducing the per kWh charge to compensate, you will likely see cheaper bills in the winter and higher in the summer in Las Vegas (assuming you're using natural gas for heating and electric A/C units).
If you have solar, your surplus solar energy credits cannot be applied to the demand charge.