Hot aisle
Hot aisle is the aisle receiving server exhaust air. Properly separating hot and cold aisles improves cooling efficiency and reduces recirculation.
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Utility Rates, Grid, and Markets
System-peak charge
A system-peak charge is based on the customer's measured contribution during utility or market peak intervals. PJM 5CP and ERCOT 4CP are common examples users will encounter when evaluating large-load operating costs.
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VPPA
Virtual Power Purchase Agreement is a financial contract for differences tied to a generation project rather than physical delivery to the buyer's meter. It can support renewable procurement but does not by itself solve local capacity or interconnection constraints.
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An energy charge bills total consumption, usually in dollars per kWh. It captures volume of electricity consumed, while demand charges capture the system capacity needed to serve the customer's peak.
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