Lori T. from Sioux Falls but working with a Montana client on NorthWestern Energy Schedule E-2. The demand charge structure seems unusual compared to other utilities I've worked with. It shows "$12.85 per kW of billing demand" but I'm not clear on how they determine billing demand. Is it highest 15-minute interval or something different?
Montana tariff question - demand charge calculation
Marilyn D. here in Helena MT. NorthWestern Energy uses standard 15-minute interval demand measurement, but they have a ratchet provision that's easy to miss. Billing demand is the higher of current month peak demand or 75% of the highest demand in the previous 11 months. This catches a lot of people off guard, especially seasonal businesses.