What Are Demand Charges — And Why They’re Eating Your School District’s Budget
| Demand charges now make up more than 50% of most school districts’ electric bills — and most business managers don’t know it. |
School districts across the country are facing the same quiet budget crisis: electric bills keep climbing, yet energy use hasn’t changed. Lights go off. Thermostats get adjusted. HVAC schedules get tightened. And still — the bill goes up.
The reason is almost always the same: demand charges.
What Are Demand Charges?
Your electric bill has two distinct components:
Energy charges — what you pay for the total kilowatt-hours (kWh) your buildings consume over a billing period. This is the part most people think about.
Demand charges — what you pay based on your peak electricity use, typically measured in 15-minute intervals throughout the month. The utility records the single highest 15-minute window of consumption and charges you for that peak — for the entire month.
Think of it this way: the utility has to build enough capacity to serve you at your absolute worst moment. Even if that peak lasts only 15 minutes on one Tuesday afternoon, you pay for it for 30 days.
Why Demand Charges Hit Schools So Hard
School buildings are among the worst-case scenarios for demand charges, and here’s why:
- They have predictable, simultaneous spikes. When the school day begins, HVAC systems ramp up, kitchen equipment fires on, computer labs boot up, and gym lights come on — all within a short window. That concentrated surge creates an enormous demand peak.
- Seasonal transitions are brutal. The first hot day in spring and the first cold day in fall drive the highest peaks of the year. One hot Monday in September can set a demand benchmark that affects your billing for the entire month.
- Most buildings have no visibility into when these spikes happen. Without real-time monitoring, facility managers are flying blind.
| Demand charges now account for more than 50% of the monthly electric bill for many school districts — and most business managers don’t realize it until they see a breakdown of their utility charges. |
A Closer Look at the Numbers
Consider a mid-sized school district with 8 buildings. Each building might have a monthly electric bill of $8,000 to $15,000. If demand charges make up 55% of that bill, you’re looking at $4,400 to $8,250 per building per month that has nothing to do with how much electricity you actually used — only with when you used it.
Across a district with multiple buildings, that adds up to hundreds of thousands of dollars per year in charges that, with the right information, can be meaningfully reduced.
What Can School Districts Actually Do About It?
The good news: demand charges are manageable — but only if you can see them.
Step 1: Understand your current demand profile
Before anything else, you need to know when your peaks are happening and what’s causing them. This requires interval-level data from your utility and ideally real-time metering at the building level.
Step 2: Stagger high-draw equipment startup
Staggering HVAC startup by 10–15 minutes across zones, or pre-conditioning buildings during off-peak hours, can significantly flatten the demand curve without affecting comfort.
Step 3: Shift flexible loads to off-peak hours
Kitchen equipment pre-heating, EV charging, and certain HVAC functions can often be scheduled outside peak windows. This is especially impactful if your utility has time-of-use rates.
Step 4: Identify and fix energy waste
Equipment left running over weekends, HVAC systems not matched to actual occupancy schedules, and power factor issues all contribute to higher demand. Visibility into your data reveals these waste patterns immediately.
Step 5: Get the right data before investing in capital solutions
Battery storage and solar can help with demand charges — but only if sized and configured correctly for your specific demand profile. Investing without data means guessing.
What School Business Officials Are Saying
| “We have already seen savings by using DataWrangler. They have helped us in fine tuning our HVAC scheduling, eliminate energy waste, and continue to provide proactive measures limiting energy demand peaks in the middle of the day.” |
| — John Stangler, Director of Buildings & Grounds, Pewaukee School District (WI) |
| “DataWrangler has helped us better understand what drives our costs and we are now implementing strategies that change how we use energy without impacting the quality of our learning spaces. I would highly recommend the DataWrangler software for school districts.” |
| — John Stellmacher, CFO, Kettle Moraine School District (WI) |
Start With a Free Energy Review
If you’re not sure how much of your district’s electric bill is driven by demand charges, the first step is a no-cost review. DataWrangler by CLOCworks will analyze your utility bills, run a history of your buildings’ energy use, and provide a detailed proposal showing your potential savings — at no charge and with no obligation.
| Submit a utility bill. We’ll show you exactly what you could save.
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Related Reading
Now that you understand what demand charges are, the next question is what to do about them. How School Districts Can Reduce Their Electric Bills by 15–25% walks through the five operational levers that consistently produce real savings — no capital investment required. If you manage the buildings yourself, The Real Cost of Peak Demand for School Buildings goes deeper into exactly what causes demand spikes in school facilities and how facilities directors are bringing them down. |
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