The power supply method of full size sex dolls affects the long-term use cost. The average annual electricity cost of the standard American sex doll is $45, while the self-powered model uses bionic energy collection technology to increase the battery life to 480 hours. The wireless charging system in cooperation with Tesla increases the energy replenishment efficiency of full size sex dolls by 37%, but the module installation fee is $350. The test model of solar skin technology can support 8 hours of basic functions under 6 hours of light. The technology is expected to be mass-produced in 2026, which can reduce the average annual energy consumption cost to zero.