• Malini K.V
• J.Madhava Rao
• Kishor Kumar K
• Kavya S Neela
• Mithun V

Solar direct-drive (SDD) instruments like freezers and refrigerators are widely used for storing vaccines and other medical products in places without reliable mains electricity. The capacity of the solar array powering an SDD appliance must be large enough to provide sufficient compressor runtime during periods of reduced solar irradiance. SDD appliance solar arrays therefore create useful quantities of excess electricity that are currently not utilized. An Arduino that prioritizes the power requirements of the appliance and diverts excess electricity to other purposes has the potential to power a wide range of electrical devices, including health facility lights, appliance data loggers, medical devices, and mobile phone chargers. This paper discusses results of laboratory testing of twoArduino prototypes employing different control logics using simulated and actual solar power, as well as results from field testing. In laboratory testing, the prototype Arduino demonstrated diversion of useful amounts of electricity to secondary loads without adversely affecting refrigerator performance in most cases. Some problematic interactions between the refrigerator compressor controller and Arduino were observed. Development of more low-powered medical devices that can take advantage of the limited power provided by Arduino would be of great benefit to health facilities in areas without reliable mains electricity. Prioritized control of loads on solar arrays may have applications beyond medical refrigeration appliances.

Solar power,Arduino board,SDD

"SOLAR POWERED BATTERY BACKED HEALTH CARE FREEZER FOR REMOTE REGIONS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.358-360, May-2019, Available :http://www.jetir.org/papers/JETIRCJ06081.pdf

"SOLAR POWERED BATTERY BACKED HEALTH CARE FREEZER FOR REMOTE REGIONS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp358-360, May-2019, Available at : http://www.jetir.org/papers/JETIRCJ06081.pdf