Constantly charge your electric bike battery while you cycle! Our patent-pending 10″ x 27″ Regenerating Solar Panel Charging System is integrated into the rear rack. Easily attaches to any of UltraTrek Electric Bikes. Puts out 2 Amps per Hour in full sunlight. Rack is enforced with heavy-duty bars to hold up to 150 lbs. Now included in any E-Grizzly Bicycle purchase.