Stereo receiver to avoid voltage drop

We were told by many people that a compressor fridge is better if you rely on solar as it uses less power. Also, as we travel on back roads we don't like to use propane even less. Plus, on ferries, your propane tank must be OFF. Some ferry rides are hours. We did have a 3 way fridge in our Four Wheel camper and it really used the power. Thus, the switch to a compressor fridge. Thanks for all your help. I guess either a lower wattage radio or the MFJ voltage booster or pile on more blankets or get a warmer sleeping bag to cut down heater use. And, turn down fridge (no ice cream). Happy Thanksgiving!!!