Though I love it, and used to make it, I no longer make it. There have recently been warnings issued about bacteria growth in sun tea (the temp in the sun is just right to grow bugs)---and I have to say I experienced this first-hand.
So, now it's a big jug of cold Water and cold-brew teabags in the fridge. Same concept, but safer.
I am an UNsweet girl, so that's all there is to it. Toss the bags after steeping, and add a squeeze of lemon. But my sweet tea husband uses Splenda. (Stevia--at least Truvia brand--caused me some weird neuro symptoms, so I haven't stuck with that.)