Forum Discussion
Wayne_Dohnal
Sep 23, 2013Explorer
Measuring zoomed-in versions of the graphs with a ruler, the voltage drop with shore power is about 9 volts, and with the Onan about double that. I don't trust that info a whole lot however from the highly compressed display, and since the Onan waveform is closer to a triangle than a sine, extrapolating the RMS value from the peaks is iffy. I could have captured all of that info precisely but I didn't. The key thing for me is that with both sources the voltage droop is fully recovered in about 120 ms. which I consider excellent. Intuitively I believe with a similar-sized inverter generator the voltage droop wouldn't be as abrupt, might not be any deeper, but would last longer as the engine spins up. Even with "eco" off, the inverter genset isn't running at full RPMs, and it has less rotating mass to absorb the shock. The RPM comment obviously doesn't apply to the fixed speed inverter generators.
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