Yes, the RF amps generate most of the heat and consume most of the power. A single antenna sector might radiate 50/MHz. If we assume that the sector is fully loaded and is using a 20MHz FDD channel then it's using at the max 50x20MHz. Now a wideband RF amps might be 50% efficient if at that. Most of the time it is 20-30%. If at 33%, then each antenna/rf amp will be consuming 3000 Watts. so for a three sector site, that will be 9-10,000 Watts. That does not include any of the other equipment.