I have a 300 W landscape transformer on my patio that is controlled by a z-wave switch (fully programmable with remote on/off via a Nexia bridge). Attached to the transformer’s 12 V output is a single buried line that runs 150 ft to a remote area where it is attached to 4 simple manual on/off switches powering 4 separate low wattage LED lighting zones. I do not change the individual switches often and the system works well but I would like to replace the manual switches with something that I can control remotely. I would prefer z-wave but I do not want to run either a 120 V power line or 3 additional 12 V lines out to the remote area.
Any suggestions of what I can replace the manual switches with to better automate this setup?
Thanks in advance for any help.