No, those electrical sensations do not signify the creation of the solar astral body, since that vehicle is only created through sexual magic. Study
The Perfect Matrimony and
The Mystery of the Golden Blossom by Samael Aun Weor.
Those vibrations are a natural psychic phenomena related to the detachment of the soul from one's physicality, so as to enter the higher dimensions. If you want to understand more about how this process works, you need to meditate on it!