The grant 2 down under (1st one out of europe)

[solarradio351]

Crude drawing but a thought for two different power sources , to shut one down totally before using the other.. Will the diodes be needed to stop lights from doing there own thing ? Light from switch will be wired to switch next to it ? Is that making any since ? Don't want power making lights half on when should be off or powering up meter in power supply.. ? What problems can you see ?