Magnum Hybrid Inverter Question

dclark1946 wrote:
After reading the explanation and thinking about it some more I still have a question about the transfer switch and what it switches. It sounds like the inverter ac output is normally connected to the ac load side so it can add power if required but if input ac power is lost and the inverter needs to provide all of the load it is already connected to the load so I must not be fully understanding the switch connection. Just asking for a high level switch connection topology.

the owner manual gives a pretty solid description of how it works.

what your specifically looking for

"3.4 Transfer Time
While in Standby mode, the AC input is continually monitored. Whenever AC power falls below
the VAC dropout voltage (80 VAC, default setting), the inverter automatically transfers back to
Inverter mode with minimum interruption to your appliances—as long as the inverter is turned
on. The transfer from Standby mode to Inverter mode occurs in approximately 16 milliseconds.
While the MSH3012RV is not designed as a computer UPS system, this transfer time is usually
fast enough to hold them up. However, the VAC dropout setting has an effect on the ability of the
loads to transfer without resetting. The lower this setting, the longer the effective transfer will be
and therefore, the higher the probability for the output loads to reset. This occurs because the
incoming AC voltage is allowed to fall to a level that is so low that when the transfer does occur,
the voltage on the inverter’s output has already fallen low enough to reset the loads.
The disadvantage of a higher VAC dropout setting is that smaller generators (or large generators
with an unstable output) may nuisance transfer. This commonly happens when powering loads that
are larger than the generator can handle—causing the generator’s output voltage to constantly
fall below the inverter’s input VAC dropout threshold"


based on this you might want to adjust the voltage setting higher so it transfers quicker.

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