Stop Overpaying for Electricity You Already Use.
The Energy Sentry 9388A monitors your home's high-load appliances in real time and choreographs when they run — so they work in harmony, not in conflict. Comfort never changes. Chaos disappears. And your bill drops 30–60%.
Your Biggest Billing Risk Isn't How Much You Use — It's How Much at Once
⚡ The Problem
If you're on a time-of-use demand rate — and millions of homeowners already are — your utility measures the single highest 15-minute spike in your usage every month. That one spike sets your demand charge for the entire billing cycle.
When your AC cycles on, your water heater fires, your dryer tumbles, and your EV charger kicks in during the same quarter-hour, that spike can add $100–$200+ to your monthly bill. You used the same total electricity. You just used too much of it at the same time.
✓ The Solution
The Energy Sentry 9388A installs at your electrical panel and manages your non-essential, high-load appliances automatically. It constantly calculates the rate at which your electric use is approaching your demand limit and sheds loads accordingly — preventing the spikes that trigger costly demand charges.
It works on the "store/defer" principle. Loads like water heaters, ACs, pool pumps, and dryers contain thermal storage — they can cycle off briefly with zero impact on comfort. Same kWh consumed. Dramatically lower bill.
From Audit to Savings in 4 Steps
Professional installation included with every system. Set it and forget it — the savings stack automatically.
Energy Audit
We analyze your utility rate plan, current usage patterns, and controllable loads to determine your optimal demand limit and projected savings.
Professional Installation
A certified technician installs the 9388A at your panel, mounts current transformers on your service mains, and connects relay controls. Typical install: 4–6 hours.
Set & Forget
You choose which loads to control and set your demand limit. Least-important loads shed first, highest-priority last. It runs silently 24/7/365.
Watch the Savings Stack
Most customers see 30–60% reduction. Full ROI in 1–5 years. After that, every dollar saved goes straight to your bottom line — year after year.
What Homeowners Are Saying
We've Never Needed Tax Incentives to Make Our Math Work.
Solar generates energy. Batteries store energy. Neither one manages when your home uses energy — and that's what demand charges are based on. The 9388A is the missing piece.
Nothing to install on your roof. No permits, no HOA battles, no aesthetic compromises.
No lithium cells losing capacity year over year. The 9388A maintains a <1% failure rate across 35,000+ installs.
Keep your thermostat where you want it. Run your pool. Charge your EV. The system manages the timing, not your comfort.
Already have solar? The 9388A makes every panel and battery dollar work harder by optimizing when loads draw power.
This isn't a startup experiment. Nearly five decades of continuous refinement. Originally developed at Colorado State University.
The savings stand on their own. No rebate paperwork, no phase-outs, no political uncertainty.
Flat National Pricing. No Hidden Fees.
Every package includes the 9388A controller, current transformers, relay hardware, professional installation, programming, and our 5-year warranty.
Currently Serving These Utility Markets
Our product automatically pre-cools, staggers large appliances, and shifts flexible loads to off-peak hours — tailored to your specific utility's rate windows.
Arizona
SRP (E-16 Demand Price Plan), APS (TOU with Demand), TEP (Demand Time-of-Use)
North Carolina
Duke Energy (Residential Time-of-Use with Demand, R-TOUD)
South Carolina
Duke Energy demand rate plans
Virginia
Dominion Energy demand rate plans
Georgia
Georgia Power (Time of Use – Residential Demand, TOU-RD-11)
Missouri
Coming soon — contact us for updates on availability.
Not sure if your rate plan qualifies?
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