Is my generator big enough?
I have have a Coleman 2500 watt generator and I am wondering if it will pull my rooftop AC on my 19ft travel trailer? My rooftop AC is a Duo-Therm Model: 57915-541. It does not say how many watts it...
Forum Discussion
Only one thing matters when it comes to the generator winding side and that is hertz. 60 hertz is 3600 rpm. Yes the gen may do it on propane but it's going to be through the governor and a wide throttle opening. So if on propane go about 20 % larger. Well...they dont give you the option to increase horse power in a particular wattage range. They sell you a little larger unit because it's on propane.
So X unit on gas will often be upsized slightly for propane. Same issues with elevation and power.
So as pinao originally said, you would basically consider it to be about 20% smaller because it's on propane. That's just how I would describe it.
When working on a portable generator, to increase or decrease the hertz, you adjust the governor speed. 3600/60 hertz. It's the ac sine wave/winding design. Rotor and windings are flashing past each segment at 60 times per second.
Some units that are 1800 rpm are wound differently but have to be still putting out 60 hertz. I have never worked on those but it seems like a great idea to slow the engine as a lot of a generators noise is from the mechanical side not the exhaust side. Any engine will be quieter at 1800 rather than 3600.
You cant put a Honda muffler on a champion and have a Honda.
I have worked on generators that people have tried to over muffle and it increased the back pressure too much and melted the control panels and wiring. The muffler/exhaust is not just noise, it's heat.
You can do it but the exhaust system has to be large and be able to remove enough heat. It defeats the intent of a portable generator. A lot of the Hondas or Yammies price isn't in the muffler, it's in the engineering and tolerances of the engine.
So X unit on gas will often be upsized slightly for propane. Same issues with elevation and power.
So as pinao originally said, you would basically consider it to be about 20% smaller because it's on propane. That's just how I would describe it.
When working on a portable generator, to increase or decrease the hertz, you adjust the governor speed. 3600/60 hertz. It's the ac sine wave/winding design. Rotor and windings are flashing past each segment at 60 times per second.
Some units that are 1800 rpm are wound differently but have to be still putting out 60 hertz. I have never worked on those but it seems like a great idea to slow the engine as a lot of a generators noise is from the mechanical side not the exhaust side. Any engine will be quieter at 1800 rather than 3600.
You cant put a Honda muffler on a champion and have a Honda.
I have worked on generators that people have tried to over muffle and it increased the back pressure too much and melted the control panels and wiring. The muffler/exhaust is not just noise, it's heat.
You can do it but the exhaust system has to be large and be able to remove enough heat. It defeats the intent of a portable generator. A lot of the Hondas or Yammies price isn't in the muffler, it's in the engineering and tolerances of the engine.
