Solar power becomes one of the most promising renewable energy resources in recent years. However, the weather is continuously changing, and this causes a discontinuity of energy generation. PV Power forecasting is a suitable solution to handle sudden disjointedness on energy generation by providing fast dispatching to grid electricity. These methods present a key insight into matchmaking grid electricity and photovoltaic plants. Bootstrap aggregation Ensemble method(Bagging) is classified as one of the most useful machine learning models which are applicable to supervised learning regression tasks. Following this regard, this paper proposes a state-of-art method based on bagging and this method works perfectly for PV power forecasting. The latter had powerful capabilities of tracking the behavior of stochastic problems with good accuracy with the aid of feature importance information. This approach comes to optimize bias/variance using feature weighting vector. Thus, this paper is devoted to present various feature importance techniques for Photovoltaic forecasting parameters. This technique consists of improving the aforementioned ensemble model via contributing the knowledge expertise obtained from features analysis to be directly transformed into the Ensemble model. The proposed model is tested on PV power prediction. Therefore, the benchmarked technique shows an improvement in accuracy in terms of RMSE to 5%.