Ticketing and entry at the door, power and distribution behind it. Two systems an event runs on before a guest notices either: the gate that lets people in, and the supply that keeps every plug live.
Two sub-collections — ticketing and entry systems for the door, and power systems for everything plugged in on site.
Self-service queue kiosks that dispense tickets, thermal wristband and label printers, and double-sided PVC ID card printers for passes and accreditation.
Total the load of your cooking, cooling and rig first, then size above it — this shelf runs from portable stations to 10–15 kW diesel sets and 24 kW solar.