Commercial bills price your whole month off your single worst half-hour of demand. A battery sees that peak coming and caps it before it lands. For most C&I sites this is the biggest single line of battery savings.
Your highest half hour of the month sets a demand charge you pay all month. Watch what a battery does to it: it banks your own solar through the middle of the day, then powers the site through the evening peak so the grid never sees it.
Illustrative day. Your real curves come from your interval data, modelled in Ampaura Designer.
Your bill has two different meters running. Energy is the electricity you use across the month, priced per kWh. Demand is how hard you pull it at any one moment, priced per kW against your worst half-hour. The network builds its poles and wires for that worst moment, so that is what it charges you for.
Peak shaving is not a switch, it is a daily routine. The system positions the battery before the risk window opens, then discharges the moment demand climbs toward the threshold.
Load, solar and tariff forecast for the day ahead, rebuilt every day.
The battery is filled from the day's solar and held ready before the risk window opens.
The moment demand climbs toward the threshold, the battery discharges and holds the peak down.
AI Mode measures what happened and re-plans, so the threshold keeps tightening.
The NSW Peak Demand Reduction Scheme pays for exactly what this page describes, and our systems are certified for it. If your site is in NSW, the numbers get better again.
How the NSW incentive works →Send twelve months of interval data and we will show you the half-hours that set your bills, and what a battery would have saved on each of them. Plain numbers, no obligation.