Certain modifications and additions to the prior art short passivation technique have lead to improvements in the low light voltage of solar cells which are made using the improved passivation technique. The control apparatus includes a receiver, a controller, an initialization state detector, and a transmitter. In particular embodiments, the locking mechanism is operatively connected to the play yard frame’s lower frame members and includes a rotatable member configured for being rotated to adjust the locking mechanism between the locked position and the unlocked position.