Fill a 2-quart or large glass jar or pitcher with 8 cups filtered water. Add 4-5 bags black tea bags. If the bags have paper tags, you can tie them together and hand them over the edge. Cover the jar loosely with a lid or plastic wrap (to keep out debris and bugs).
Place in a sunny spot outside or on a windowsill in direct light for 1 to 4 hours, depending on the type of tea you choose.
Taste test the tea after 1 hour. For a lighter tea, check and remove the bags now. For a stronger brew, continue steeping and taste hourly (but no longer than 5 hours to avoid bitterness).
Serve immediately over ice or chill in the fridge before serving with lemon slices and sweetener, if desired.
Notes
Steeping Time: Black tea usually brews fastest and is often ready in 1 to 2 hours, though the exact time depends on the sun and how strong you like your tea. It can steep for up to 4 hours.Tea Options: Green tea makes a lighter, more delicate pitcher and usually steeps in 1 to 2 hours, so start tasting early. Fruit tea can steep for 1 to 4 hours, and hibiscus blends add bold color and tangy flavor. Herbal tea is usually ready in 2 to 3 hours, but delicate varieties like chamomile should be checked early to avoid bitterness.Container: Use a clear glass jar or pitcher for brewing sun tea. Plastic should be avoided in direct sunlight.Storage: Once brewing is complete, refrigerate the tea promptly and drink it within 1 to 2 days.