12 volt

I have 380 watts of lithium batteries I currently charge with a 300 watts of solar power I want to add a dc to dc charger but am clueless on what works I have heard that some of them will kill alternators can you recommend one that works? Thanks for your input...

I am looking for recipes for the 12 volt lunch box oven as I will be buying one tomorrow looks like a great way to cook or heat foods. I am wanting first to try making bread from scratch in it but no idea how much flour I can use one cup or 2 ? I know you can use aluminum pans in them to help...

Here is a schematic I have drawn up for a 12 volt power supply that I am currently working on. Please disregard the power inverter being direct wired to the battery. I have changed this because I have wired banana jacks to the battery for direct power so I can plug the inverter into them because...