This paper presents the fabrication and working of a smart solar grass cutter. In this work, we have developed a solar-powered lawn mower and thus saved energy by decreasing air pollution and reducing labor cost. In the old model, cutting iron was used. Due to its high environmental impact, it was the most expensive cutter used by the engine. We have utilized a microcontroller in our project to control the different lawn mower actions. Two DC gear motors (10,000 RPM, starting current 1.7 A and no load current 1.5 A) are used to move the solar grass cutter, and one DC blade motor (7000–13,000 RPM, starting current 0.7 A and no load current 0.45 A) is used to cut the grass quickly. With current technology, this new prototype is designed as a remotely controlled grass cutter using Arduino UNO. The Smart Solar tracker is controlled via Bluetooth by using a smartphone. The Smart Solar Grass Cutter can run for more than two hours when the battery is completely charged.

Due to the gradatory reduction and exuberant ingestion of fossil fuels and the subsequent environmental problems, accretive work has been paid to the utilization of renewable energy sources, such as solar energy. Solar Photovoltaic System or Solar Power System is one of the renewable energy systems which uses PV units to convert sunlight into electricity. A DC compressor of 12 V/80 W, 12 V/50 Ah battery, a pair of 12 V/175 W solar panels connected in parallel through a 10 A charge controller was used for the refrigerator. Temperature was programmed to monitor and control the switching states of the DC compressor. This research project has established that the energy required for the real process of a DC refrigerator could be amassed from a renewable energy source at a reduced price and its application can be beneficial in developing countries. ATMEGA16 microcontroller with temperature, weight and momentary sensors interfacing was programmed in C language to control and monitor the ON/OFF states of the DC compressor. In this work, energy can be obtained from renewable energy resources at a reduced cost for the effective operation of a DC refrigerator. Thus, developing countries can also take benefit from its applications.

This paper introduces and uses a single-phase, high-power LED driver with a battery backup. The buck–boost converter and reverse converter are both combined to achieve optimal performance. In the first part of the integrated circuit, the buck–boost converter is simply used to adjust the power when operating in the non-continuous operating mode. The reverse converter provides free voltage to the LEDs when released as a remote DC–DC converter. The battery backup cycle directly charges the battery at the same power as the LED driver required and provides charging power when there is no electricity. This paper demonstrates the functionality of the entire system and proves that it is an effective solution for new lighting applications.

To ensure the flexibility and reliability of the power system demand and supply, demand side management with distributed generation is a tool to manage the high demand. In the present work, the demand side residential energy management for household equipment is investigated. Loads of units are divided according to priority. Every individual load is smart enough to switch on/off itself with respect to the power generated from the distributed source. Experiments are performed using MATLAB Simulink and the results showed improvements in electricity bills. Real-time pricing in the present system of billing is more economical than a flat rate system. When distributed resources are connected with the units, then flat rate billing is also more economical than real-time pricing.

This article addresses the issue of power outage while transmitting electric power to consumer’s end. Electricity demand in today’s world has risen sharply where it must be generated not only using conventional fuels, but also from renewable sources in order to meet this demand. In this regard, an automatic switch is being developed that allows switching between sources in such a way that first and foremost, electric power from solar and wind farms is transferred to the consumer or to the general network. It not only resolves the issue of unforeseen blackouts and power outages, but it also ensures that the consumer end is receiving voltage from a stable generating source. This is how the automatic switch will work effectively in the best interests of the consumers.

Technological advancements have improved energy efficiency and increased energy requirements requiring improved energy density solutions to optimally utilize the existing landscape. The renewable energy density of urban rooftops can be increased by introducing micro wind farms consisting of vertical axis wind turbines (VAWT). VAWTs do not require directed flow thus a feasible choice. In this paper, the preliminary study for parametric design of horizontal distance between two identical Savonius wind turbines is presented. Three different simulations were performed to reveal important insights about this problem with an inlet velocity of 2 m/s. The results suggest 3D analysis for accurate insights.