Standard power is low cost eco-friendly solar power working off the internal warehouse lighting system. Ambient light trickle-charges a rechargeable DC battery.
Crossing Guard has a low battery alert system triggered by a second battery, which will warn if the primary battery needs recharge, repair or replacement. Avoid the cost, the inflexibility and the approvals needed for electrical wiring.
Crossing Guard can also be plugged into a existing low voltage power source.