Re: Solar Lighting for red/green and anchor light.
NYBo's question was about the motor. Navigation lights are only used when you're underway, i.e., when the motor is running. If the motor has an alternator it's charging your battery and replacing whatever current is drawn by the lights. Ergo, solar lighting is unnecessary- and as previously mentioned, NOT USCG approved.
Change your anchor light over to LED (USCG approved, of course) and don't worry about the nav. lights (provided your motor charges the battery).
My .02