15-Minute Smart Meter Data: What Your Usage Says About Your Home

Your smart meter records your electricity use every 15 minutes, 96 readings a day. Taken together, those readings tell a clear story about how your home runs and which kind of plan fits it.

For how the meter itself works, read how smart meters work in Texas on GridWise Audit. This article looks at what the data says once you have it.

Your Seasonal Shape

Month by month, most Texas homes rise in summer and dip in spring and fall. How big that swing is matters. A home with a big summer peak can land on the wrong side of a bill credit threshold in mild months, or pay heavily on a plan priced for lower use. Seeing your own seasonal shape is the first step to picking a plan that holds up all year.

When in the Day You Use Power

Fifteen-minute readings show whether your usage leans toward daytime, evenings, nights or weekends. That matters most for time-of-use plans, which charge different prices in different hours. A plan with free or cheap nights is only a deal if a real share of your power falls in those hours.

High-Use Days

Daily totals also show the days that stand out. A day that uses far more than your usual pattern can point to a heat wave, guests, a pool pump left on, or an appliance working too hard.

Solar Homes

If you have solar, the meter records both the power you buy and the power you send back. Those two numbers have to be kept apart to judge a buyback plan fairly.

What the Free Audit Does With It

The free WattTrim audit asks you to authorize access through Smart Meter Texas, then uses up to 12 months of your 15-minute data. It:

• Prices each available plan at your actual monthly usage, including bill credits in the months they apply.
• Splits your usage by time of day so time-of-use plans are priced on your own hours.
• Keeps solar exports separate from the power you buy.
• Shows a month-by-month table of your usage and estimated cost.

What Sentinel Adds

WattTrim Sentinel is an optional subscription ($4.99/mo or $44.99/yr). It pulls fresh data every week and keeps comparing plans as your usage changes. In the Sentinel portal, high-use day tips flag recent days where your usage was well above your daily average for that billing cycle, so you can spot what changed while it is still fresh. Sentinel also sends contract renewal reminders. These features are part of the subscription, not the free audit.