An inverter converts the DC current from your battery to AC current the powers most 120volt appliances, like airators, fish finders, computers. You can pick up a cheap inverter for like $25 for your truck. It plugs into the cigarette lighter or accessory outlet, plug in your cell phone charger or your laptop, or blender for the best Margaretta's.
Almost sounds like you need an old 10 gallon fish tank to keep minows alive at home. Has a air source, filter system, and should hold enough water to keep it cool for a few days. Forever if left int eh basement.
My minnow bucket has a lid with holes. On hot days I dunk it in the lake to swap water, pour some out, refill with fresh water, repeat as needed.
HOI Crappie Club
Where family and friends come to compete for a little more than bragging rights.
Quick, someone teach me how to fish so I can win this tournament!!!