Originally Posted by sailorboy1
Where did you measure the amps in relation to the capacitor? It's function is basically to supply extra amps to the compressor on start-up by discharging.
I'm not going to go back a pick the thread apart. But have you tried to start and run the unit while on shore power? If you did did you measure the amps then?
Assuming your system will start; if it wouldn't start with the potable gen then the capacitor isn't supplying enough power. Get a larger capacitor!
Yes of course I made these measurements with shore power.
You are at least partially wrong, or at least misleading, though, in saying that the capacitor supplies "extra" amps. The motor draws X-number of amps to start, assuming the circuit has the capacity to supply all the needed amperage, which it should on shore power (ideally). It can not supply any more than the motor requires in this ideal case. So on shore power, the capacitor doesn't supply extra amps, it supplies some of the required amps, thereby reducing the load on the supply line. Of course, that's ideally, and I would say that there is probably a voltage drop on the shore circuit when the compressor starts, limiting the amps to below what the motor actually requires. The more the voltage drops on the supply line, the more amps the capacitor provides, in relation to what's required by the motor. So from that perspective, it does supply "extra" amps . I guess that's why these capacitors are used a lot because so many of the circuits can't supply the required amps.
Of course, I'm no EE either, but that's what I remember form my electrics courses.
But you make a good point in that I measured between the capacitor and the motor. So if my supply line, even on shore power, can't supply the required amps, that might explain why the current went up with the SPP6. So maybe it does work. I don't know at this point. But it still didn't work with the generator. And I still think there should be a voltage across the capacitor with the relay closed.
And there was another thread on here (yes I searched before starting this thread) that said someone with my exact AC unit, and a Honda
2000 generator, and an SPP6, worked. That's why I ordered the SPP6 and bought the generator. If the Honda
is rated at 12.5 amps, and the Ryobi at 15 amps (which I verified), my system should work, assuming the SPP6 actually works. That's why I want to know if these miracle Honda generators are somehow producing quite a bit more than their rated amps. Which it sure would be nice if someone would verify, empirically.