That's actually the box I pointed out earlier in this thread. Folks can make fun of being it's just a "relay driver". But I wish Morningstar would call it a RD-1 Programmable Logic Controller instead. It has four output channels, programmable timers that go up to 18 hours, and can turn on or off just about anything, including complete wind systems and solar arrays, based on high or low voltage set points.
Anything you can turn on or off with a relay, it will run or control, including auto gen-start functions.
If you're going to use an RD-1 to start a generator, it only requires one output channel for a two-wire gen, and two output channels for a three-wire gen (a three-wire gen will have sustained ignition on two wires and crank on one - so you have to drive two relays). With a diesel, on some gens you can use two wire (one glow/stop, and one crank). On some diesels it might take three output channels (preheat, crank, stop).
One thing the RD-1 does not do is crank lockout on gen voltage/freq sense. So it does not have programmable retries on gen start. Technically, if the gen doesn't start so you get a voltage increase, the RD-1 is going to re-try a gen start after the timers you have programmed into it expire. But I don't like that. So for that reason, I only recommend them for two-wire gens that have a built-in controller on the gen. If you have a three or four wire gen and it starts reliably, then it might work OK. But it will keep the starter engaged on gen start for the crank time you have programmed into it. This normally kicks the starter drive off the flywheel and it may not hurt anything. But I don't like that function of it. It is best suited to two-wire generator start systems.
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Chris