Photos: Electric introduction at the Tesla Design Studio

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)

Tesla CEO Elon Musk introduces a new line of residential and commercial batteries in a dramatic announcement at the automaker’s design studio in Hawthorne.   (Jerome Adamstein / Los Angeles Times)