I'm at the early stages of thinking/investigating about adding a portable solar panel to our 4x8 teardrop when we're out for a longer camping trip in an area with no electric hookups. We have a 12 v battery, an inverter, LED lights and don't use much juice except to grind coffee and charge phones. But on dark cool nights it would be nice to plug in the tablet or computer and watch a movie and not worry about draining the battery. I've looked at some 130 watt folding portable panels (Humless).
We do have the ability to charge the battery while driving via the leads from the battery in the car, through the tail-light/stop-light connector. I'm wondering if I can't just run leads from the solar panel controler to a connector that would connect with those same two leads in the tail-light/stop-light connector on the teardrop that connect to the battery. Wouldn't that work and save me having another pigtail hanging out of the battery to connect to?