Our first game there we had seats on the first deck, third base line, about middle left field. Game started at 6:20 and it was not until about the 3rd inning that the sun got off us.
Second game we had tickets on the second deck also third base line but closer to the dugout. Sun was hidden by the clouds and it was nice, but during a day game it would have been different.
First base side would definitely be where you want to sit if you want out of the sun.
Battery was awesome. We accidentally showed up 3 hours before game time (my time was messed up between eastern and central) and were able to walk into a restaurant and get a table. The next night, we went two hours before game time and could not get a seat anywhere. So, go a little earlier if you have tickets and want to eat before the game.