Demand Charges on Alberta Farm Bills: What They Are and What to Do About Them

If you're a farm or commercial operation in Alberta, demand charges are probably the part of your energy bill you understand least — and they may be costing you more than you realize. Here's a plain-language explanation of what they are, why they matter, and what can actually be done about them.

What Are Demand Charges?

Most Alberta residential electricity bills charge you only for the energy you consume — measured in kilowatt-hours (kWh). Agricultural and commercial rate structures work differently. In addition to the energy charge, they include a demand charge based on your peak power draw during the billing period, measured in kilovolt-amperes (kVA).

Think of it this way: the energy charge is like paying for the water you used. The demand charge is like paying for the size of the pipe — the maximum flow capacity you required at any point during the month, even if you only needed it for 15 minutes.

For farms on Fortis Alberta Rate 21 or Rate 22, demand charges can represent 30–50% of the total monthly energy bill. Many farm operators don't realize this because the line items aren't always clearly labelled, and the billing structure isn't explained when accounts are set up.

How Demand Charges Are Calculated

Under Fortis Alberta's agricultural and commercial rate structures, your demand charge is typically calculated based on the highest 15-minute or 30-minute average power demand recorded during the billing period. It's usually expressed in kVA (kilovolt-amperes, which accounts for power factor) rather than kW.

The important thing to understand is that demand charges are based on your peak demand during the month — even if that peak occurs once, briefly, under unusual circumstances. Starting a large motor, running multiple high-load pieces of equipment simultaneously, or a brief surge during grain drying can set your demand billing for the entire month.

Fortis Alberta Rate 21 also includes an 85% ratchet clause — meaning your billable demand is at least 85% of your highest recorded demand in the previous 12 months, even in months where your actual demand is lower. This can significantly affect bills during slow seasons.

What Can Be Done About Demand Charges

Unlike energy charges, which you can reduce by using less electricity, demand charges require a different approach:

• Load staggering — avoiding the simultaneous operation of large motors and equipment. Starting grain dryers at different times, sequencing pump starts, and scheduling high-load tasks to avoid overlap can reduce peak demand without reducing production
• LED lighting upgrades — replacing high-wattage lighting with LED reduces the base load, which lowers the demand baseline. A barn full of metal halide fixtures replaced with LED can reduce that facility's contribution to peak demand by 60–70%
• Power factor correction — motors and older fluorescent lighting have poor power factor, which inflates kVA demand billing. Capacitor banks can improve power factor and reduce kVA charges without changing actual energy consumption
• Battery storage — batteries can provide peak power during high-demand windows, reducing grid draw and billable kVA. This requires careful analysis of when demand peaks occur and sizing the battery to cover those windows
• Rate class review — verifying you're on the right rate class for your operation. The difference between Rate 21 and Rate 22 billing structures can be significant depending on your load profile

Why This Matters Before Installing Solar

Solar panels reduce your energy consumption (kWh) but don't directly reduce demand charges. If demand charges represent 40% of your total bill, a solar system sized to your energy consumption will only reduce 60% of your costs — not the full bill. Understanding this before sizing a solar system is critical to accurate ROI projections.

QuotePath's free energy audit specifically addresses demand charge analysis as part of reviewing your full energy profile. We review your rate structure, identify demand charge reduction opportunities, and factor all of this into any solar or LED recommendation. Book your free energy audit to get a clear picture of your full energy costs.