INTRODUCTIONElectrical technology for the Renewable Energy (RE) uses solar energy source as an alternative source of reliable energy. Some of the problems arising in the photovoltaic system (PV) among others: prediction of PV configuration and battery size, energy consumption prediction, maximum power system and performance analysis of PV system. The PV system modeling is an initial phase to be considered, such as size, identification and simulation applications. In some literature, models have been proposed for modeling of different components on the stand-alone PV. Some methods are based on software simulation namely by using the program such as; PSpice, Matlab Simulink and Labview (Wahid and Hambali, 2015;Ramenah et al., 2014;Mizuki et al., 2014). This article will introduce a model of solar radiation based on weather forecasting system. It produces short-term photovoltaic output predictions from the forecasting information from the meteorological department. Based on the output results of solar radiation and distribution network, then an algorithm can be generated. The prediction model of produced photovoltaic power can predict the output and algorithm in computational speed (Bastidas-Rodríguez et al., 2018;Mai et al., 2017;Lin, 2012). Meng et al. (2014) have proposed to utilize solar power plant (photovoltaic) on a micro grid system with DC voltage source. The battery charging and discharging system is connected to the traction system through a DC bus. For tracking the maximum power point is adopted on the solar power plant. Consequently, if applied for locomotives on working condition and regenerative braking produce a more stable voltage.Akos Baldauf (2015) has developed an RE

Community service program is a mandatory activity for higher eduacation in community empowerment and development. These activities include training programs and application of appropriate technology including the utilization of solar energy for water pumps in orphanages in Rokan Hulu regency and the street lighting program in Simpang Petai village, Kampar regency in Riau province. This activity also considers to the obstacles faced by the community with offering and implementing appropriate technology to them as beneficiaries. This activity takes place with the involvement of students in work and lecture program (KKN) that integrated with community service activities.It is shown that the community as beneficiaries have joined diligently and received assistance with this program by implementation of solar water pump and street lighting. The evaluation of this activity shows that collaboration continues between the community and the Department of Electrical Engineering, Faculty of Engineering, University of Riau and the communitis feel helped and there is an improvement in the electricity infrastructure in their village. This activity was carried out in a fostered village by the Faculty of Engineering, University of Riau.

One alternative energy that is easy and can be used is wind. This energy is utilized through wind turbines which have two general types, namely horizontal and vertical axis wind turbines. This wind turbine can move by utilizing the energy available in the wind to rotate the turbine. The problem with wind turbines is self-starting is difficult to achieve. This can be caused by several factors, such as slow wind speed and erratic wind direction. In addition, wind turbines also have low-efficiency values. Therefore, our contribution to this research is to design a blade controller on a vertical axis wind turbine. This blade control is designed by utilizing the pitch angle by using actuators that are applied to each blade based on the Proportional, Integral & Derivative (PID) algorithm. The PID algorithm is used to find the appropriate pitch angle value on a vertical axis wind turbine. The effect of the pitch angle on the wind turbine serves to maintain the mechanical power value by the available power in the wind. This research was conducted using a simulation method (MATLAB). In this study, it was found that this wind energy conversion simulation produces maximum mechanical power when the wind speed varies is 1723 Watt and when the wind speed is 7 m/s, mechanical power achieved is 362.595 Watt.

Pencemaran lingkungan yang diakibatkan oleh pembuangan limbah cair pabrik kelapa sawit dapat menyebabkan ketidakseimbangan ekosistem. Tidak hanya bagi tumbuhan, dan hewan, namun pengaruh pencemaran tersebut menyebabkan gangguan kesehatan masyarakat sekitar. Kegiatan abdimas ini dilakukan di Desa Sungai Bawang tepatnya pada aliran sungai Muara Lembu. Untuk pemantauan kualitas mutu air, penulis merancang bangun sistem pemantauan berbasis nirkabel dan real time. Parameter berupa kekeruhan dan pH menjadi prioritas pengamatan untuk kegiatan abdimas ini. Bacaan kedua sensor ditampilkan pada papan informasi yang dibangun di depan kantor desa, untuk memudahkan aparatur dan masyarakat sekitar mengawasi kualitas mutu air sungai. Dari hasil pengamatan, air sungai bersifat asam karena mengandung pH berkisar 5,4–5,9, sementara untuk kadar kekeruhan pada tahap sedang dengan nilai berada di antara 125–205 NTU.

Pencahayaan dalam ruangan belajar yang baik akan menciptakan kenyamanan disetiap kegiatan adalah hal yang sangat baik. Pemasangan dan ketersediaan titik lampu dan jenis lampu yang baik dan tepat dapat mempengaruhi kondisi pencahayaan dalam sebuah ruangan. Permasalahannya adalah pemasangan titik lampu dan jenis lampu yang tidak sesuai dengan standar telah ditetapkan di Indonesia, dan ianya akan menyebabkan kerugian kepada manusia berupa gangguan pada fungsi mata. Tujuan pengabdian kepada masyarakat ini adalah untuk meningkatkan penerangan dan teknologi pencahayaan yang baik pada beberapa ruangan belajar (kelas) di MA dan MTs Pondok Pesantren Khairul Ummah. Kemudian, meningkatkan kualitas penerangan dan pencahayaan pada ruang belajar berbasis perangkat lunak. Metode yang akan dijalankan dalam pengabdian kepada masyarakat ini adalah mendesain dan teknik pencahayaan yang baik menggunakan perangkat lunak DIALux evo 8.1.