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The microgrid consists of at least one energy source that is connected to a load in a relatively small area. In practice, microgrid are divided into two types, off-grid systems or often said to be standalone systems and on-grid systems that are connected to utility networks. The use of renewable energy sources, such as photovoltaic, has become an alternative energy for the problem of electricity energy deficits. This research examines the possibility of saving power consumption from the network using a grid-tie inverter (GTI) power converter in a microgrid configuration so synchronization can be made between renewable energy systems and utility networks. The integration of photovoltaic energy resources with the grid system will increase the value of electricity capacity while reducing the use of fossil fuels, as well as a positive impact where the use of renewable energy can reduce energy use and bills to be paid. Integration of grid tie testing carried out without a load can convert the power generated by almost 90% distributed in the utility network, while testing with a load using a grid tie system, can save power up to 70% of the energy supplied by the utility network.

The use of renewable energy from solar panel systems is increasingly being applied, but until now the utilization has not been maximized. The movement of the sun caused by the rotation of the earth should be taken into account to maximize electrical energy in the solar panel (PV). In this study, a concept was proposed to control the movement of the two-axis sun tracker with smartphones using bluetooth communication. Controlled by rotating two DC motors, two axes are joined together into linear actuators that can extend and shorten, so that the solar panel can move towards the sun. This system uses a light sensor (Light Dependent Resistor) and a gyroscope sensor as input and two DC motors that are placed on each axis as output. The motor driver used is the Monster Moto Shield. Sun tracker that is used based on tetrahedron geometry and uses three light sensors. The light sensor functions to determine the position of the sun while the gyroscope sensor is used to determine the tilt angle of the solar panel. The gyroscope module used is MPU-6050. This system also uses the GY-273 compass sensor which functions to determine the direction of the wind direction. Components of input and output are connected to the ATmega328P microcontroller and wireless communication using bluetooth. The Bluetooth module used is the HC-05 module. The solar panel movement and the power obtained are then monitored and recorded for analysis

Penelitian ini bertujuan untuk mengetahui pengaruh beban kerja dan komunikasi organisasi terhadap semangat kerja pada karyawan PT Bukit Baiduri Energi di Kabupaten Kutai Kartanegara. Penelitian ini menggunakan pendekatan kuantitatif. Subjek penelitian ini adalah 90 karyawan yang ditentukan dengan menggunakan teknik sampel jenuh. Metode pengumpulan data yang digunakan adalah skala semangat kerja, beban kerja dan komunikasi organisasi. Teknik analisa data menggunakan uji analisis regresi berganda. Hasil dari penelitian ini menunjukan bahwa: (1) ada pengaruh negatif dan signifikan antara beban kerja terhadap semangat kerja dengan koefesien beta (β) = -0.494, serta nilai t hitung > t tabel (-4.945 > 1.986) dan nilai p = 0.000 (p < 0.05); (2) ada pengaruh signifikan antara komunikasi organisasi terhadap semangat kerja dengan koefesien beta (β) = 0.264, serta nilai t hitung > t tabel (2.633 > 1.986) dan nilai p = 0.006 (p < 0.05); (3) ada pengaruh signifikan antara beban kerja dan komunikasi organisasi terhadap semangat kerja dengan nilai F hitung > F tabel (23.647 > 3.10) dan nilai p = 0.000 (p < 0.05). Kontribusi variabel (R2) beban kerja dan komunikasi organisasi terhadap semangat kerja pada karyawan adalah sebesar 35.2%.