nRF24L01 uses just 12mA current during transmission, which is quite low compared to some LEDs. It only utilizes 26µA current in standby mode and 900nA in power-down mode. This module ... of the DHT11 ...

A module-level power electronics can achieve the maximum power generation for each PV panel with overcoming the partial shading. However, it increases the possibility of DC series arc fault condition ...