Demand charges are the single biggest hidden cost in most school district electric bills, yet most facility managers have never had a clear explanation of what they are or how to reduce them. DataWrangler by CLOCworks helps school districts understand and control demand charges every billing cycle, resulting in average savings of 10 to 25 percent on monthly electric bills.

If you have ever looked at your utility bill and wondered why it is so high despite efforts to reduce energy use, demand charges are almost certainly part of the answer. They represent 40 to 70 percent of the average large-facility electric bill. However, most energy conservation measures do not directly address them.

What Demand Charges Actually Are

Your utility company measures your electrical demand in short intervals throughout the billing period. That interval is typically 15 minutes. The single highest demand reading during that period becomes your demand charge for the entire month.

In other words, demand charges are based on your peak draw, not your average draw or your total consumption. A brief surge in electrical demand, even one that lasts only 15 minutes, can set your demand charge for 30 days. As a result, one equipment startup at the wrong time can cost your district thousands of dollars. For a full breakdown of how this appears on your bill, see our guide on understanding your school district utility bill.

Why Traditional Energy Saving Measures Miss the Mark

Turning off lights, installing LED fixtures, and replacing old appliances all reduce your energy consumption. However, they do not necessarily reduce your demand charge. Your demand charge is set by your peak draw during the billing period, which is often driven by large systems like HVAC and kitchen equipment starting up simultaneously.

In addition, even a building with excellent energy efficiency can have high demand charges if its equipment is not scheduled thoughtfully. That is why demand management requires interval-level data, not just energy audits or efficiency upgrades. The U.S. Department of Energy notes that demand management delivers faster returns than efficiency upgrades in most large commercial buildings.

Common Sources of Demand Spikes in School Buildings

School buildings have predictable patterns that create demand spikes. HVAC systems starting simultaneously at the beginning of the school day is one of the most common sources. Kitchen equipment ramping up before lunch service is another. Computer labs running at full capacity during testing periods contribute as well.

Furthermore, after-school activities bring concentrated lighting and equipment loads in gyms, auditoriums, and athletic facilities. Each of these events can set your demand charge for the month if it happens to be your highest peak draw. DataWrangler identifies every one of these events in your monthly report and tells you exactly what each one cost. For a detailed look at how these costs add up, read our article on the real cost of peak demand for school buildings.

How to Reduce Demand Charges Without Capital Investment

The most effective demand reduction strategies for school districts require no capital investment at all. Staggering HVAC startup times so that different zones come on sequentially rather than simultaneously is one example. Pre-cooling or pre-heating during off-peak periods before occupancy begins is another.

In addition, scheduling high-draw equipment to avoid overlap with other peak loads can reduce your demand charge significantly. DataWrangler’s monthly reports give your facilities team specific schedule recommendations based on your building’s actual demand patterns. Moreover, those recommendations get more precise over time as we build a deeper understanding of your building’s behavior.

What DataWrangler Does That Other Systems Do Not

Most energy monitoring systems show you your consumption data. However, they do not connect that data to your utility tariff. As a result, they cannot tell you what your demand spikes are actually costing you in dollars. DataWrangler integrates your interval meter data with your specific billing structure so every number in your monthly report is tied to a real dollar cost.

Furthermore, DataWrangler does not just give you data to interpret. Each monthly report includes specific action items for your facilities team. You do not need an energy engineer on staff to benefit from the service. For a broader look at the strategies districts use to reduce costs, see our article on how school districts reduce their electric bills.

Find Out What Demand Charges Are Costing Your District

Upload one utility bill and DataWrangler will show you exactly how much of your bill is driven by demand charges and what your district could realistically save. Visit our No Charge Energy Review page to get started. There is no cost and no commitment required.