The demand charge is the line item nobody models until it hurts

Most industrial electricity bills carry two separate charges: energy, for the kilowatt-hours consumed over the month, and demand, for the single highest 15-minute spike in kilowatts pulled during that period. Energy is intuitive: run less, pay less. Demand is not.

A compressor, a furnace, and a chiller all starting up within the same quarter-hour can set a peak that has nothing to do with your average load. On many utility tariffs, that one spike, the “ratchet,” sets or influences your demand charge for months afterward, sometimes for a full year.

Industry-typical range, not a Hvare measurement: for a two-shift facility, demand charges are often 30–50% of the electricity bill. We model your actual number from 12 months of your utility data.

Three levers, one operational cost

• Shift flexible loads out of the peak window: disruptive, and not every load can move.
• Add on-site generation: solar helps, but it doesn't cover an evening or overnight peak.
• Add storage: discharge into the spike, recharge off-peak. Nothing about the process changes.

Storage is the lever with the least operational disruption, because it doesn't ask the plant to change how or when it runs. Whether it pays back on your site depends on your actual load shape and your actual tariff. That's exactly what a feasibility study is for.