School Electricity Rates
Buildings empty every summer. Bills don't. Fixed charges, demand ratchets, and a big HVAC load during the school year create a cost profile that generic commercial rates don't handle well.
The seasonal paradox that keeps school bills high
A school's annual kilowatt-hour total looks modest compared to a manufacturer or a hospital running 24/7. But that number hides the real problem: most of the energy compresses into the school year, when HVAC, kitchens, device charging, and event loads all stack on top of each other. The result is a high peak-month demand sitting inside a low annual consumption — the classic low load factor pattern that suppliers price conservatively.
Summer vacation creates the illusion of savings. Fixed charges and distribution costs bill every month regardless of consumption. On tariffs with a demand ratchet, a single peak during the school year can set a charge that appears on invoices well into summer, even with the building dark.
The move that matters most is shopping supply rates competitively — then pairing that with a few operational changes that shave the demand peaks driving the underlying tariff cost.
Where school electricity actually goes
HVAC — the dominant load during session
Heating and cooling classrooms, hallways, gyms, and cafeterias drives the majority of consumption while school is in session. A 6 AM building-wide startup call from the BAS stacks every air handler at once — setting the month's demand peak before the first student walks in. Staggering zone startup removes that spike at zero operational cost.
Kitchen & cafeteria — meal-service spikes
Commercial ovens, steamers, and dishwashers run hard for two or three service windows per day. On full-meal days the kitchen can rival HVAC as a demand contributor. Event catering days — holiday concerts, graduation — stack kitchen, lighting, and HVAC simultaneously.
Device charging carts — a new simultaneous load
1:1 Chromebook and iPad programs concentrate dozens of chargers into a single cart. When classes end and students return devices, every cart on every floor plugs in at roughly the same time. That after-school charging wave stacks on top of end-of-day HVAC — often the second-highest demand moment of the school day. Shifting cart charging to overnight eliminates the stack.
Gyms, auditoriums & event spaces — irregular peaks
High-bay gym lighting, stage rigging, and sound systems draw large loads for short windows. A single evening basketball tournament or spring play brings HVAC, lighting, and kitchen up together. These one-off events can set the meter's highest reading of the month — and therefore the month's demand charge.
Five moves that reduce school electricity costs
- Stagger morning HVAC startup zone by zone
Sequence zones 10–15 minutes apart instead of an all-call at 6 AM. The total energy used is identical; the peak demand reading drops because loads no longer overlap. This is the highest-leverage operational change available to most schools. How demand charges work →
- Program deep setbacks over breaks and holidays
Thanksgiving, winter break, spring break, and summer are long windows of near-zero occupancy. A building automation system or even programmable thermostats can hold setback temperatures during these periods. The savings are structural — every degree of setback across weeks of vacancy compounds on the energy bill.
- Charge device carts overnight
Move cart charging to overnight hours when HVAC has ramped down and the meter is reading its lowest values. The energy consumed is the same; it no longer stacks with the after-school HVAC and kitchen close-down loads that can create the day's second demand peak.
- Build event-day load awareness into operations
Evening events — graduations, concerts, tournaments — stack HVAC, lighting, and kitchen simultaneously. Knowing which events fall in which billing month lets facilities staff pre-cool the space earlier (lower demand during pre-event hours) and stagger lighting startup. Understanding your bill charges →
- Shop supply 60–90 days before renewal with documented quotes
That window gives multiple suppliers time to price your load profile and gives you room to compare. Public schools and districts often need competitive quotes on file before awarding a supply contract. Getting those quotes through a comparison is exactly the paper trail procurement rules require.
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School electricity questions
What uses the most electricity in a school?
HVAC is the dominant load during the school year. Heating and cooling classrooms, gyms, cafeterias, and administrative wings accounts for the largest share of consumption while school is in session. Kitchen equipment runs a close second on days when full meal service is operating, and auditorium and gym lighting spikes on event days.
Why aren't summer electricity bills zero if the building is empty?
Fixed charges—customer charges, distribution demand charges, and meter fees—appear on every bill regardless of consumption. Some utility tariffs also include a demand ratchet, which bills a percentage of your peak demand from the prior 11 months even in low-use months. That means a single hot June school-year day can set a ratchet that follows the building through August.
How can schools cut demand charges?
Stagger HVAC startup zone by zone instead of bringing the entire building online at once. A single 6 AM all-call from the building automation system creates a demand spike that sets the billing peak for the month. Sequencing zones 10–15 minutes apart spreads that load and can reduce the measured peak meaningfully. See our guide to demand charges for the mechanics.
Should a school choose a fixed or variable electricity rate?
Fixed rates align well with school budgets, which are set months in advance and can't absorb mid-year price swings. A fixed supply rate locks the energy component for the contract term so budget planning is straightforward. Variable rates can be lower in calm markets but carry the risk of spikes during winter weather or grid stress events—hard to defend to a school board mid-fiscal-year.
When is the right time for a school to shop its electricity supply?
Start 60–90 days before your current contract expires. That window gives suppliers time to quote, gives you time to compare, and avoids the default month-to-month rate your utility charges when a contract lapses. For public schools and districts, procurement rules often require documented competitive quotes before a contract can be awarded—getting multiple supplier quotes in writing satisfies that requirement exactly.
Related resources
Understanding Demand Charges
How peak demand is measured and why HVAC startup time matters so much for schools.
What's on Your Electric Bill
Fixed charges, demand charges, energy charges — what each line means and which ones you can influence.
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