Ice Tea shelf-life question?

[Skid Row Joe]

I made/brewed a gallon jar of ice tea with the large tea bags on the countertop yesterday afternoon.....

Now here's the question; does this stuff need to be refrigerated, and if so, how long is it good for just sitting on the countertop at room temperature?

I have always refrigerated it - but I bought a watermellon that's taking up all the room in the refrigerator. I can only eat so much watermellon or drink so much tea a day.

I'd put the ice tea or the watermellon in the motorcoach's galley refrigerator - except while I'm at my homebase in Texas, the coach sits at a somewhat severe angle where the refer won't function properly on the slope of my lot/land.