You should work to be running your power outputs in parallel, and stepping them down from your ultimates like this... for every ult solar you go mfsu, mv transformer, 2 lv transformers, to machines.
As an example I've attached a picture of what my EU setup looks like, its a 5x5 grid for solars, i have a lightning rod system at bedrock that goes right through the center of the grid so its 24 ult solars 24 mfsus, 24 mv transformers and 48 lv transformers, the line traveling below powers all of my EU machines. the setup scales up to 12,500 EU/t if i should have enough machines to draw that but at most I'm running 6k eu/t draw, and never run out of power day or night.
edit also pro tip if you're running your mass fab (easy gregtech) without scrap slap an autarchic gate on it to emit a redstone signal when it doesn't have amp (scrap) to maximize your energy use.
edit edit if you plan on build this make sure you go bottom first to top and plan out how many solars you ultimately want (pun) to save yourself some accidents.