A New Hybrid Model for Hourly Solar Radiation Forecasting Using Daily Classification Technique and Machine Learning Algorithms

Table 2

The annual comparison between the ML models.

Error metrics	ANN	SVR	GB	RF
RMSE (W/m^2)	62.73	62.80	63.40	62.44
nRMSE (%)	18.70	18.73	18.91	18.62
MAE (W/m^2)	33.94	32.52	34.57	32.75
nMAE (%)	10.12	9.69	10.31	9.76
AIC	6136	27273	5546	21428