3000W Chinese Gensets Info.
professor95 wrote: EDIT ADDED 45/5/2013- When this thread started in March of 2005, I never expected to see it survive this long or amass the quantity of information that has been shared here. In...
Forum Discussion
Max49 wrote:
Here's what I did to my Champ and it now starts the AC and only struggles for a second or 2.
Please tell me if you think I did something that could hurt the RV appliances or the Champ; and if not you could let me know too.
Before the Champ ran about 3650 RPM with no load and dropped to 3450 with a 1500 watt load.
I turned the no load RPM to about 3800 RPM and now with the 1500 W load it drops to about 3600 RPM
I also turned up the voltage from 120V to 124 Volts. I watched the volt meter while the AC compressor kicked in. It dropped to about 117 volts at start up for a couple of seconds , the AC started and the volts went back to 123-124.
I have ordered the SP6E for one AC but I would feel better if you knowledgable guys, and especially our Professor, would 'bless' these changes I have made to the Champ. Don't forget, I live in Colorado and often camp at 9000' , maybe a little higher. Much cooler up there but less oxygen and horsepower.
Max,
None of the adjustments you made should cause any harm to either the generator or the items you have connected.
Single phase line voltages typically can range anywhere between 105 and 132 VAC and the frequency between 55 and 65.
One other item that comes to mind that can make an RV problematic to start with a generator is resistance (translate to voltage drop) in the cord set between the generator and air conditioner itself. Before anyone starts an extensive internal investigation of wiring, measurement of voltage at the generator when the A/C is starting (or trying to start) and again at the A/C will tell you if you are experiencing voltage drop in your cables.
Anything greater than 2% for a running load is considered "bad" - or a drop of 2.4 VAC at the load with a 120 VAC supply. The voltage drop on the same cables will be considerably greater when the compressor is trying to start (higher current).
The fix is generally replacement/repair/cleaning of interconnection devices (plugs, caps, wire-nut connections, screw terminals) and/or increasing the wire gauge of the cables or making them shorter.
