Offerings to Ra
Some of these are attested in ancient sources while others come from my own (or other people’s) personal experience giving offerings to the God.
Liquid Offerings
Water
Beer
Pomegranate-Wine
Wine
Orange Juice
Coffee
Tea
Food Offerings
Bread and Barley
Fruits and Vegetables
Oranges, Apples
Figs
Dates
Fig Newtons
Pastries; cookies and cakes
chocolate
Meat Offerings
chicken or duck
beef
Non-Food Offerings
Scents: myrrh, frankincense, sandalwood
Flowers: Yellow, Orange or Red Roses, Sunflowers, Yellow or Red flowers, Water lilies, lotus
Light: yellow, red, gold or orange candles; beeswax candles; lanterns
Colors: Red, Orange and Yellow; White
Jewelry: Gold, solar colors
Taboos
pork
fish; any seafood
ram
Disposal of Offerings
1) Eat them
2) With wine or water, you can leave it to evaporate on the Shrine or pour it out as a libation when done.
Sacred Animals
Falcon
Hawk
White Heron/Bennu Bird
Cat
Bull
Ram (as Ra-Atum or Ra-Wesir)
Sacred Symbols
Sun
His Barque
Pyramids
Obelisks
The Bennu Bird (White Heron; Phoenix)
Syncretisms
Amun-Ra
Atum-Ra
Khepera-Ra
Khepera-Ra-Atum (Dawn, Noon, Dusk)
Khnum-Ra
Nefertem-Ra
Ra-Atum
Ra-Heruakhety (Ra Horakhty; Ra and Horus of the Two Horizons)
Ra-Wesir
Sobek-Ra
Wesir-Ra
Sources
Quirke, Stephen. The Cult of Ra: Sun-Worship in Ancient Egypt. New York: Thames and Hudson, 2001.
This Website: Wepwawet Wiki: Ra
Fiercely Bright One 
Thank you very much! I’ve had a difficult time finding reliable sources on the internet and yours seems to be very reliable and one of the only ones that has left sources!
Thank you!