Demand Charge Management Strategies for Texas Office Buildings

Most Texas office buildings shop the supply rate hard and never touch the bigger lever: demand charges. On a commercial building, the difference between a good bill and a brutal one usually isn't the cents-per-kWh — it's how the building peaks, and whether anyone is managing it.

Here's what drives those charges, and the levers a property team can actually pull.

Demand charges 101: kW vs. kWh

Your bill measures two different things:

• Energy (kWh) — how much electricity you use over the month.
• Demand (kW) — your single highest sustained draw, usually measured over a 15-minute interval.

You pay for energy by the unit. You pay for demand by your worst moment. Flip on the chillers, the elevators and the full lighting load together on a hot afternoon and you set a peak that prices the whole month — even if it lasted fifteen minutes.

Load factor: the number that explains your bill

Load factor is the ratio of your average demand to your peak demand. A building that runs steadily has a high load factor and spreads its costs efficiently. An office tower with sharp morning startups and afternoon HVAC spikes has a low load factor — and pays a premium, because the grid and your TDSP have to be sized for that peak whether you hit it once or a hundred times.

4CP: the Texas wildcard

In ERCOT, a big slice of transmission cost is allocated using the Four Coincident Peak (4CP) — your building's demand during the four 15-minute grid-wide peak intervals across June, July, August and September. Your transmission charges for the following year are set by how much you were drawing in those few summer moments. Miss them and you save all year; hit them hard and you pay all year.

Five levers a property team can pull

1. Peak-shaving and scheduling — stagger large loads (chillers, pumps, EV charging) so they don't all spike together.
2. 4CP avoidance — when grid peaks are forecast on hot summer late afternoons, curtail non-essential load for those windows.
3. Load-factor improvement — flatten the profile; a smoother building is a cheaper building.
4. Sub-metering — find which tenant or system is setting the peak before you can manage it.
5. The right contract structure — match fixed, index or block-and-index to the building's actual load shape, not a headline rate.

What's no-capex — and what isn't

Most of these are operational: scheduling, curtailment during 4CP windows, and contract structure. That's UPG's lane — no solar, no batteries, no capital project. Equipment upgrades like better controls or efficient chillers can help too, but they're a separate decision; you can capture real demand savings without spending a dollar of capex first.

An illustrative example

Take an office building with a 400 kW monthly peak and a demand charge around $12/kW — roughly $4,800 a month in demand charges alone, before a single kWh of energy. Shave that peak by 15% through scheduling and you're looking at a meaningful four-figure annual saving, from operations rather than equipment. (Figures are illustrative; your TDSP, rate class and load shape determine the real number.)

Where to start

The fastest way to know what's possible is to let someone read your actual load shape. UPG's free Energy Health Check does exactly that: we pull your interval data, find where the peaks come from, and show you in writing what managing them is worth. See how we work with commercial real estate and load shifting & planning, or start your free Energy Health Check.