Energy and climate problems that occur encourage the intensification of energy use efficiency, one of which is in buildings. The building sector is the largest contributor to energy consumption when compared to other sectors due to the need for comfort in life, including to regulate air temperature, ventilation, and artificial lighting. Window innovation as a building component leads to adaptive smart windows technology that has energy saving features. The use of these windows is attractive because they are designed to adapt to changing environmental conditions to minimize large heat losses by adjusting their transmissivity and conductivity. Various types of smart windows have developed, one of which is electrochromic technology as dynamic glass technology which has been widely used as smart windows in commercial buildings. Several studies have shown that its use in buildings has been shown to save energy consumption in buildings through the HVAC and lighting aspects. However, in today's technology, its performance still requires external power to adjust their optical conditions. Therefore, the innovation in developing electrochromic smart windows technology that is integrated with photovoltaic technology is an interesting thing to do. The combination of the electrochromic solution with photovoltaic Si-TFSC placed on a glass substrate provides promising optical performance and energy benefits. The integration of electrochromic and photovoltaic devices provides better efficiency in energy saving, because photovoltaic and electrochromic devices can achieve electrochromic layer discoloration without an external power source. Given the photoelectric and optical modulation properties of electrochromic photovoltaic windows that can function as solar cell modules as well as powered smart windows on their own, this technology has a major advantage in applying sustainable energy to buildings. In its application in buildings, to improve device performance, the control system can be applied by adjusting environmental conditions according to the sensor system readings to obtain better device performance.

Technological developments require the development of wireless power transfer systems. From the various types of technology, magnetic coupling-based wireless power transfer system is one of the most widely used technologies. This research was conducted to study and design a magnetic coupling based wireless power transfer system circuit using the Proteus 8 simulation software. This wireless power transfer system consists of a transceiver, an inductive coil, and a power receiver. Experiments have been carried out and a wireless power transfer system using inductive coupling can produce power readings in the receiver coil circuit. The measured voltage value on the receiver coil in real (not ideal) conditions indicates power losses of at least 17.1296% due to electromagnetic interference. However, this magnetic coupling based wireless power transfer system can provide charging flexibility so that it remains attractive for application in various technologies.

Energy plays a strategic role in human life today. In this case, energy is an interdisciplinary concept from the concepts of science and the environment to global social problems. One aspect of energy development is energy conservation, where efficient and rational use of energy is carried out without reducing energy use performance. To increase public awareness and participation on energy issues, especially those related to energy conservation, it is necessary to increase knowledge about energy in the wider community, one of which is through energy literacy. This is because knowing energy will empower people to make wise decisions and take responsible action regarding energy use. Energy literacy here can be obtained through formal and informal education. This study investigates the condition of energy literacy in Indonesian society in general through a sampling method, and it is found that the level of energy literacy in Indonesian society is on a moderate scale, but it is still not enough to reach the expected level of energy literacy, while the energy literacy level is less. Energy literacy and energy conservation will also be increasingly hampered. Therefore, it is hoped that an increase in education or energy literacy related to formal and non-formal education so that people are more familiar with and apply energy conservation in their daily lives.

Mushrooms are one of the agricultural products that are in great demand because of their high nutritional content, healthy and delicious taste. Nowadays, mushroom cultivation is increasingly widespread and focuses on understanding the optimal environmental conditions for good mushroom production. The main parameters that affect the growth of fungi are the temperature and humidity of the environment, where the fungus will grow optimally at a temperature of 20 to 30°C and at a humidity of 60 to 90%RH. But unfortunately, mushroom farmers often find it difficult to monitor at any time the environmental conditions where the mushrooms grow. For this reason, an iot-based temperature and humidity monitoring system was developed for use in mushroom cultivation rooms. This system is assembled using a DHT11 temperature and humidity sensor, a NodeMCU ESP3866 microcontroller and WiFi module, and an LCD screen. IoT development is carried out using the Thinger.io platform which allows mushroom farmers as users to monitor room conditions directly through a web page.