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Indonesia has a great solar energy potential because its location in tropical area. One of significant characteristic of solar energy is intermittency. Integration of interimittent renewable energy source (IRES) especially solar energy into electrical power grid can cause significant impact in power system stability. This study aim to model the IRES characteristic, profile, and time duration classification based on collected data in Cipayung microgrid system. The result shows the characteristic of IRES consist in two type, suddenly increase and suddenly decrease of solar source. These two characteristic profile modeled by polynomial and logarithmic regression analysis using mathematically equation. There has not been found a condition where the availability of solar energy value is immediately decrease to high level or increase to zero. The very fast IRES classification of time duration is the most often occurs about 0.5 to 1.0 minutes. System operator can use these model to prepare the power plant and prevent the system collapse even blackout.