Eight objections, answered honestly

We would rather you understand this than buy it. A few of these are things we would say ourselves if we were on the other side of the conversation.

"It's just a fancy thermostat"

Why people say this. And plenty of products marketed as energy savers really are just thermostats with an app, so the skepticism is earned.

Fact. A thermostat measures one thing: the temperature in the room it is mounted in. It knows nothing about your water heater, your dryer, your pool pump, or your electric bill. It cannot tell whether three loads are about to overlap, because it cannot see any load but its own.

The Demand Automation Computer measures total electrical demand entering your building. Current transformers clamp around the incoming service conductors ahead of the main breaker, at roughly a 1,000:1 ratio, so it sees every amp the building draws, sampled 1,000 times per second. And it acts on the rate demand is rising, not just the level. If demand is climbing fast enough that it will overshoot your limit before the current interval ends, the system acts before the limit is reached rather than after it is crossed.

A thermostat has no concept of a demand interval, no concept of a limit, and no ability to coordinate anything. Different devices, different jobs. You should keep your thermostat.

"It'll make me uncomfortable"

Why people say this. Because the mechanism is real. Anyone who tells you a demand controller can never affect comfort is not being straight with you.

Fact. Comfort is a dial, and you hold it.

The demand limit is the one setting the homeowner adjusts. Higher limit means more appliances running at once and a higher bill. Lower limit means more savings and less margin on the hottest afternoons. Bill Brayden, who invented the system, describes it as cruise control for the house.

A documented example: a home under 3,000 square feet with two air conditioners and a pool started at a 3.0 kW limit and saw more temperature rise than the owner wanted on 110-degree days. He raised the limit to 4.5 kW. The house now holds 74 degrees and the bill still dropped roughly 40 to 60 percent.

The design also protects comfort structurally. Water heaters get held first because a delayed reheat is invisible. Air conditioners get a minimum run time of 8 minutes on a 30-minute averaging period or 10 minutes on a 60-minute period, so a compressor that starts actually delivers cooling. Dryers get the highest priority in the system and are the last thing ever held.

Honest bottom line: at a reasonable limit, most people do not notice. At an aggressive limit on the worst day of the year, you might. The dial is yours.

"It will shut off my power"

Why people say this. In the 1980s and 90s, utilities installed switches on residential air conditioners and water heaters that cut them off during system emergencies, on the utility's schedule, for the utility's benefit. People remember coming home to a hot house. That memory is legitimate.

Fact. This is not that, in three specific ways.

It does not disconnect your service. It briefly interrupts individual controlled circuits, in sequence, usually for minutes. Lights, refrigerator, computers, outlets and every uncontrolled circuit stay energized continuously.

It is not a breaker. It does not trip anything, does not disconnect anything permanently, and needs no action from you to restore anything. Loads come back automatically.

And it works for you, not for the utility. Nobody outside your building is deciding when your equipment runs. The system responds to your own demand and your own limit.

"I'll have to change how I live"

Why people say this. Almost every other energy-saving recommendation does require behavior change. Do laundry at 10 p.m. Precool before 5. Do not run the dishwasher during peak. It is reasonable to assume this is more of the same.

Fact. The system is automatic and does not ask you for anything.

There is no app to check, no notification to respond to, no schedule to follow. Start the dryer whenever you want. It has the highest priority in the system.

Two small things do come up at commissioning, and it is fair to name them. First, thermostat guidance: set the house to the lowest comfortable temperature, typically 70 to 72, rather than letting it sit warm. You are pre-cooling the thermal mass so there is something to coast on. Most people prefer this. Second, you have to be on a demand rate plan with your utility for any of this to save money, and switching plans is a call you make. We will tell you which plan and help you compare.

Beyond that, the system runs unattended, continuously, without input.

"Solar already fixed this"

Why people say this. Because for a lot of customers, solar did fix most of the bill, and it is reasonable to assume it fixed all of it.

Fact. Solar is a kilowatt-hour product. Demand charges are a kilowatt problem. They are different lines on your bill calculated different ways.

Your demand charge is set by the single highest interval of the month, which is typically the moment when consumption was highest and production happened to be lowest. Monsoon cloud cover can cut array output 70 to 90 percent in minutes. Panel soiling derates output invisibly. Inverters trip and thermally derate, sometimes for weeks before anyone notices.

The structural problem is larger than any of those. On SRP's Manage Demand plan, the on-peak window runs 5 to 10 p.m. weekdays. In midsummer, production is finished well before that window closes, so several on-peak hours every weekday get zero solar contribution while the house is still hot and still cooling.

This is getting more relevant, not less. SRP retired traditional net metering in November 2025, and new solar customers now go onto the Customer Generation plan, which carries a demand component.

We do not sell solar and we are not arguing against it. Solar handles your energy. It does not handle your worst thirty minutes. Full detail is on our Solar and Demand Control page.

"I'll just shift my usage manually"

Why people say this. Because it partly works, and because people who try it are usually the most engaged, most capable customers we talk to. Some of them get real results.

Fact. Manual shifting works well for time-of-use energy charges and works poorly for demand charges.

TOU is about when. You control that. Run the dishwasher at 9 p.m. and you have genuinely saved money on energy.

Demand is about simultaneity, and you cannot see it. Your water heater's thermostat closes when the tank drops a few degrees, and you do not know it happened. Your air conditioner starts when the house warms up, and you are not tracking it. Neither tells the other what it is doing, and the overlap between them sets your peak.

To do this by hand you would have to know, continuously, the instantaneous draw of every large load in the building, and intervene within seconds when two of them are about to coincide. Every day, all month. Miss it once and your demand charge for that entire month is set.

That is not a discipline problem. It is an information problem. You do not have the data, in real time, at the service entrance.

"It reduces how much electricity I use"

Why people say this. Honestly, because some vendors imply it. If a product saves money on an electric bill, the natural assumption is that it uses less electricity.

Fact. It does not, and this is the answer we give every time.

The Demand Automation Computer defers load. It does not eliminate load. Your kilowatt-hours stay essentially constant. Your water heater still heats the same water, it just heats it twenty minutes later. Your air conditioner still delivers the same cooling. Your dryer still dries the same clothes.

What changes is the shape of the curve, not the area under it. The peaks come down and the valleys fill in. Total energy is about the same.

The savings come entirely from the demand charge, which is a separate line item billed in dollars per kilowatt. On many demand rate plans that line is a significant share of the bill, which is why the savings can be large even though consumption did not move.

There is a direct consequence of this: if your rate plan has no demand charge, this product will save you nothing. That is the first thing we check, and if the answer is no, we say so and the conversation ends. We would rather tell you that in the first ten minutes.

"This is the same as a smart panel like Span"

Why people say this. They occupy adjacent shelf space, they both involve electricity and software, and both get described as smart electrical products. The confusion is understandable and the marketing does not help.

Fact. They do different things, and the difference is automation.

Span monitors individual circuits and gives you good visibility into where your electricity is going. It is a well-built product. It does not perform automated demand control. It shows you data.

EcoFlow and Lumen Smart monitor usage and make suggestions. Also useful, also not automated. They tell you what to do and leave the doing to you.

Utility load control boxes from the 1980s and 90s answered exactly one question, over and over: is demand above the limit or below it? Above, shed. Below, restore. No prediction, no coordination, no knowledge of what was running. Bill Brayden's description is the clearest one we have: the old ones just had a voltage. Too high, turn off loads. Too low, add them back. There was no algorithm.

The Demand Automation Computer measures total service demand at the mains, calculates both the level and the rate of change, predicts an overshoot before it happens, and sequences loads in priority order to prevent it. It also learns the approximate size of each controlled load over time by watching how total demand changes when it switches something, and updates those estimates as appliances age.

It is not a smart breaker, not a load-shedding relay box, and not a monitor that shows you a chart and asks you to act. In the sub-300 kW market, we are not aware of another product doing automated predictive demand control.

One more thing we should say plainly

Demand control is not right for everyone. If your utility does not offer a demand rate, if your load curve is already flat, or if your demand charge is small enough that payback runs past a decade, we will tell you. We have turned down projects for exactly those reasons, and we would rather do that than sell a system that does not earn its keep.

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Still have questions? Call toll free (888) 461-9336, direct (970) 461-9600, or email help@energysentry.com. Monday–Friday, 8:00 AM–5:00 PM Arizona time.