• Tejaswini . K
• Sai Kumar . T
• Ramesh . J

In the present day scenario due to the limited availability and depletion of conventional energy sources relying on non- conventional energy source is the best alternative for this problem .On the other hand better utilisation of non-conventional energy sources has to be made to bring down the power consumption cost .In this prototype a relevant solution is being made by automatic transfer switch and it can be implemented for household appliances. The automatic transfer switch is microcontroller based platform where the switching between utility service and solar PV system is made to power up the devices in such a way that cost of power consumption decreases. In this prototype Arduino platform based Atmega 328 p-pu microcontroller is used to control the switching operation .According to the voltages of utility and solar the switching action takes place. So in order to measure the voltages of utility service and solar powered batteries voltage divider circuits are being used and these analog values are given to microcontroller and upon comparison of these two values the switching i.e powering up of devices takes place in such a way that the electricity bill decreases as compared to conventional processes such as off-grid system. In this project the switching of devices is done using basic components in order to minimize the cost and one other hand meet the aim with accuracy.

Hybrid grid system, off–grid system, arduino, priority loading.

"Modeling of Energy Saving Circuit for House hold Appliances ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.706-710, May-2019, Available :http://www.jetir.org/papers/JETIRCJ06149.pdf

"Modeling of Energy Saving Circuit for House hold Appliances ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp706-710, May-2019, Available at : http://www.jetir.org/papers/JETIRCJ06149.pdf