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In agriculture with the hydroponic method of the DFT system (Deep Flow Technique), the circulation of plant nutrients must occur continuously to prevent decay in plants. Along with the many concerns due to the large electricity costs incurred to run the irrigation system for hydroponic plants, the authors hereby design a tool in the form of a submersible pump as a medium for regulating the flow of water in plants by utilizing a 50 WP PV module instead of a source of electrical energy from PLN. The method used in this research is the method of observation, literature study, design, and testing. The results of the 50 WP solar panel-based submersible pump trial show that a circuit connected to a battery at 1M Head tends to produce a stable water discharge, which is an average of 6.03 liters/minute compared to one that is not connected to a battery, which is only 5.28 liters/minute. Furthermore, the resulting water discharge affects the quality of the plants, especially in root length, number of leaves, leaf length, and leaf size. The test results are used as a reference for the comparison of expenditure costs between irrigation systems run using solar cells and those based on conventional (PLN).

Electricity is a very important need for the life of many people. Especially with the increasing number of tools that use electricity as a source of energy in this day and age. With the increasing demand for electricity, the more electrical energy that must be issued, especially by PLN. Electricity is also a source of energy that is needed in all activities related to electronics, therefore its use varies greatly. The purpose of making this final project entitled "Installation of Solar Power Generation Devices (PLTS) as a Source of Electrical Energy in the Garden of the Mahktab Building, Panca Budi Campus" is as a form of saving electrical energy in garden lighting. Electrical energy saving is done by utilizing solar cells, batteries as current storage and LED lights which are operated with a control system. The method used in this final project is the design method. The method steps are analysis, design, manufacture and testing. analysis, design, manufacture and testing. The design of the solar cell device as a converter of solar energy into electrical energy which is then stored in the battery.