Yamaha Generator question

wa8yxm wrote:
One thing I mention When my Rig was new I sometimes charged batteries using a Generac 1000. this is a true 1000 watt continous device (at least mine was) and it powered my Progressive Dynamics 9180 with wizard and dead house batteries.. You even had enough left over to power a night light... (not much more than that) converter is rated 1100 watts at full load.
Now once the batteries fill up.. Well that genny is not good for much but then I could watch TV if I wished. not much more with just 1KW.
2KW i could nuke lunch.

Apparently it does no good to correct your silly story each time you repeat it over the years, but anyway here we go again! :(

First the 9180 is rated at 1300w and it needs a 20a circuit--see the specs here:

https://www.progressivedyn.com/rv/power-converters/pd9100-series-rv-power-converters/pd9180a-80-amp-electronic-power-converter/

And they are talking about 13.6 volts, not the 14.4 volts needed to charge the battery bank. Plus they don't mention the 0.7 PF it has, which makes that 1300w into 1857VA.

You say you got 1857VA from your 1000w gen? Ha! (to say the least)

Now let's go through what really happens with the 9180 doing 80 amps when battery reaches 14.4v just before amps taper and demand on the gen eases off.

Output- 14.4 x 80 = 1152w
Efficiency est 85% (specs say > 80) so input 1152/85 = 1355w
PF is 0.7 with PDs (and others) so 1355/7 = 1936VA

Fact is you need a gen that can hold 1936VA to run that PD9180 at full blast. A Honda 2000 at sea level could do it (fisherguy said his could) for 30 minutes, but really a 2200 is needed, and it has the necessary 15/20 receptacles too.