Electric Blimp?

[Combwork]

Or dirigible? Something the size of the Hindenburg or bigger using helium for lift. Skin covered with the lightest photovoltaic cells possible. By day they power electric motors and charge lightweight batteries, by night the batteries take over.

Possible? Zero running pollution; load carrying capacity would depend on size but it need not look like a floating cigar. What about something circular with a hole in the middle? Wing profile through 360 degrees, the hole in the middle lets the air blow clear after it's given lift. Could the machine be steered by altering the wing profile as it flew?

Just a thought.