You have 5 ways to power your backlit address numbers: You only need one power source & one LED Driver/transformer for all the numbers. 110V Hardwiring - 110V AC to 12V DC transformer needed Existing 12V DC power source Existing landscaping system - additional 12V AC to 12V DC converter might be needed if your landscaping system is 12V AC 110V Plug/Outlet - 110V AC to 12V DC transformer needed Solar Panel Power Bank If you want to power up your lighted address numbers with the solar panel power bank, please choose the solar panel power bank option from the required powering accessories section. LED Driver/Transformer, Dusk to Dawn Light Sensor, Timer, Dimmer, and Plug are Not needed with the solar panel power bank option as the solar panel power bank has a built-in dusk to dawn light sensor, timing & dimming functions. Please find wiring diagrams for powering the backlit address numbers on this link Please refer to our installation instructions page on this link for more information