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Snakefruit rind which has been treated as waste has not been optimally processed, in fact it is only used as waste by the community, even though snakefruit peel can be reprocessed into herbal tea for snakefruit peel. Snakefruit skin has a high content of antioxidants and polyphenols. This service activity aims to introduce new innovative products from processed zalacca peels, namely herbal teas at Micro, Small and Medium Enterprises in Wonosalam Village, Jombang Regency. The main process for making tea from bark is drying at a temperature of 60 0C and drying time for 7 hours. This service activity was carried out in August 2022 at the Wonosalam Village community activity workshop and the introduction process was carried out at Micro, Small and Medium Enterprises for soft drink products in Sumber Hamlet, Wonosalam Village. The parameter used to differentiate the quality of herbal teas is the respondent's satisfaction index on the color, taste and aroma of herbal tea. Where the highest satisfaction is in bark tea with Screwpine aroma, which is as much as 75% of the total respondents.

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The Indonesian region, which has a tropical climate and has a wide sea, is one of the factors that make the population a fisherman. Fishermen from Pasuruan Regency, especially Lekok Village, are one of the producers of high quality marine products so that production reaches foreign exports. This study aims to develop the productivity of marine products in Lekok District, Pasuruan Regency which is constrained by the process of drying fish. Using research methods of literature and empirical studies, an automatic fish drying machine is designed by utilizing a hot air blower which is controlled by a thermistor and accompanied by a rotating system so that the results resemble manual drying using solar radiation. From the results of data analysis and system testing, it shows that the quality of fish that is dried with a rotary system is more effective than drying machines in general, such as the rack type because the results of drying fish are more even. The test results for the drying process require a temperature setting of 45-50 degrees within 220 minutes to reach a moisture content of 0.38% with a drying machine capacity of 32.5 kilograms.

- The rooftop of the University of Muhammadiyah Surabaya Integrated Laboratory building which has an area of ​​210 m2 can be used as a solar power plant (PLTS). Installing PLTS in buildings has several advantages, namely as a long-term energy investment and easy to integrate with the grid electrical system. PLTS is designed to save electricity consumption. In addition, if PLTS is connected to a battery, it can meet some of the energy needs at night. To design a PLTS installation in the Integrated Laboratory building, this research uses technical and economic analysis methods. Technical analysis is carried out to determine the capacity and number of PV mini-grid components required for installation. While the economic analysis aims to calculate the investment costs and the length of time for the return on investment compared to buildings without PV mini-grid installations. Based on this research, the results show that the amount of energy required for the Integrated Laboratory building is 482.148 kWh, while the planned PLTS is able to provide energy of 216,128 kWh. The PLTS design requires an initial investment of Rp. 927,700,894,-. So by using the Payback Period (PP) method, it can be concluded that the planned design is feasible, because the comparison of the cost of return on investment is 9.13 years faster than the project age that has been determined previously, which is 20 years.