Generator to run three RV's?

valhalla360 wrote:

Gdetrailer wrote:


In the OPs case..

2 RVs with 50A shore power = 24Kw
1 RV with 30A shore power 3.6Kw

Fair chance that the folks with 50A shore power will easily end up tripping the gen. Their rigs have a 50A breaker so they can draw 50A (6,000W) on each leg which means the generator breaker now becomes the limiting factor.

You are confusing the theoretical peak load with the realistic peak load. Most 50amp rigs never hit anywhere close to their theoretical peak.

30amp it happens but even there it's for a second or two then drops back to something closer to 10-15amps. As long as everyone's air/con compressor doesn't kick over at the exact same time, you can have a generator quite a bit lower.

Not "confusing" anything.

For all intents and purposes, the two RVs with "50A" shore connections are able to draw more power than the one that is 30A. The breakers on the gen now become the limiting factor.

A 6Kw gen can output a max of 25A at 240 or 2 120V at 25A each.

13.5K A/C when running will draw easily 13A (1560W)in the heat of the day not including startup surges. They will have a LRA current of 20A-29A (2400W-3480W)each. The LRA is why many folks struggle getting a 2Kw inverter gen to consistently start and run a A/C unit.

Typical 6Kw gens are combo 120V/240V, you can pull max of 25A at 240V or you have essentially two separate 120V only windings which provide 25A each.

if the 50A rigs were connected via a 50A-30A 120V adapter you have to stack two rigs on one 120V winding and one on the other 120V winding.

You could of course connect the 50A rigs to the 240V outlet but now you have two rigs stacked but yet the way 50A rigs are wired it will still have more loads on L1 than L2 and still have to share one leg heavily (generally the second A/C unit is put on the L2 circuit).

The result will still be someone losing out.

The fix is simple, either go much bigger than 6Kw or bring your own smaller gens. 9Kw-10Kw would be the min I would recommend, that gives you some hope that the two rigs stacked on the one leg will not easily trip the breaker on the gen.

Something else to consider when using 120/240 gens, uneven loading of the two 120V windings results in uneven and poor voltage regulation. The AVR samples from only ONE of the 120V windings resulting in rather poor voltage regulation if you stack the load unevenly (IE more load on the wrong winding).