I’ve converted my steam power production to use 3 large turbines running Ultimet rotors for some 1,500 EU/tick (the displayed output keeps fluctuating between 1200 and 1800, presumably because the EV dynamos don’t emit a packet until they hit 2,048 EU).
Setting up the first turbine and figuring out how I’d re-configure power distribution took considerable time, but building turbines 2 and 3 went pretty quickly. Compared to most multiblocks, the large turbines are somewhat simple, with only 5 special blocks (controller, maintenance, dynamo, input and output hatches).
It helped considerably that I only had to build one set of redstone logic for control, and turn them all on or off together. The logic is as I laid out earlier - one set of comparators and a RS latch to check available energy storage, and one for available steam. The turbines turn on if the battery is nearly empty and there’s steam available, and turn off if the battery is full or steam runs out.
Running out of steam should never happen, but there could be some reason why the boilers shut down.
In practice both the turbines and the boilers run fairly steadily since the output energy buffer and steam buffer are large. If the turbines are running continuously due to load, the boilers run 13 minutes on / 2.4 minutes off since they produce 20% more steam than the turbines consume.
Peak demand so far has been about 2,400 EU/tick, but I expect that will go up dramatically once I build some actual EV machinery. So far my only actual EV consumer is my disassembler. I know the Tungstate electrolysis requires 2k EU/tick, and all of the Resin Board electronics also require circuit assemblers demanding 2k EU/tick each.