

Maybe a bit more so it can cope with inclement weather. I recommend giving the electrical engine double its intake so it can run through the night (obviously you're gonna need a buffer like a BatBox as well). You don't have to alternate, a forked conductive pipe will do the trick. On Forestry easy mode, I'd say 1-2 MJ/t is enough between the two machines to keep things going, which means a single electrical engine (Choke upgrade or not). The wheat grows on its own, and you're probably OK with the farm and harvester taking a bit to harvest and replant. Other farms have to do a lot more (such as harvest multi-blocks structures, replace soil blocks, gather loose items). The wheat farms especially, because it only has to harvest the crops and replant. Even though Forestry farms drain a lot of power, they're A-OK with receiving very little, and in fact I'd recommend that because you get seriously diminishing returns if you power them fully.

How many solar panels you need is up to you.
