Yamaha 2000iS and softstart with AC?
I have a older Yamaha 2000iS (not sv2) and a Magnum 3012 hybrid inverter but can’t run an AC due to the poor surge capability of the generator (it drops voltage too fast for inverter to ‘support’ it s...
Forum Discussion
I just posted this chart on another topic...
RV Roof Top Air Conditioners: Watts for start ____Average wattage once running
7000 btu RV air conditioner 1700 ________________________600
10,000 btu RV air conditioner 2000________________________700
13,500 btu RV air conditioner 2750_______________________ 1250
15,000 btu RV air conditioner 3500_______________________ 1500
from https://www.ramsond.com/wattage-chart/
You really need a bigger gen or a smaller AC. IF your trailer is small enough, has small windows and is very well insulated then a 9200 btu would work fine with your 2000 gen. Unlikely you have a 9200 as 13.5 and 15 are most common. If you have a 15 btu then forget it. 13.5 then maybe , but 1,250 watts is more than 50% power just to keep compressor running, thats a lot of load continuously. How long does the compressor normally run per cycle?
Have you tried running your gen on the normal mode? That's not in the eco mode where it idles down when not needed. Run it full speed in non-eco mode and see how much things bog down first. This will tell you if the gen can even supply the power.
For a 13.5btu unit the soft start should work fine if your gen will start it on the non-eco mode. It is that issue of the gen running at idle with almost no power output then having to rev up the motor and bring the power up all while the AC is trying to pull that power out.
If you are handy with electrical then maybe try an additional start capacitor as they are cheap.
If your gen will run the AC then most likely the $320 soft start will start it. Nobody can say unless they have your exact gen and AC combo. Sorry.
*also, Im not really that familiar with the Yamaha. Are you saying that the generator's inverter runs off the coach batteries too? (uses battery power to supply the inverter to invert from DC to AC) The gen puts out AC, then turns it to DC so it can then turn it back to AC through the inverter, which will be able to supply 120 volts no matter the rpm of the generator motor.
If so, then you will need very big and very short battery cables supplying the generator.
RV Roof Top Air Conditioners: Watts for start ____Average wattage once running
7000 btu RV air conditioner 1700 ________________________600
10,000 btu RV air conditioner 2000________________________700
13,500 btu RV air conditioner 2750_______________________ 1250
15,000 btu RV air conditioner 3500_______________________ 1500
from https://www.ramsond.com/wattage-chart/
You really need a bigger gen or a smaller AC. IF your trailer is small enough, has small windows and is very well insulated then a 9200 btu would work fine with your 2000 gen. Unlikely you have a 9200 as 13.5 and 15 are most common. If you have a 15 btu then forget it. 13.5 then maybe , but 1,250 watts is more than 50% power just to keep compressor running, thats a lot of load continuously. How long does the compressor normally run per cycle?
Have you tried running your gen on the normal mode? That's not in the eco mode where it idles down when not needed. Run it full speed in non-eco mode and see how much things bog down first. This will tell you if the gen can even supply the power.
For a 13.5btu unit the soft start should work fine if your gen will start it on the non-eco mode. It is that issue of the gen running at idle with almost no power output then having to rev up the motor and bring the power up all while the AC is trying to pull that power out.
If you are handy with electrical then maybe try an additional start capacitor as they are cheap.
If your gen will run the AC then most likely the $320 soft start will start it. Nobody can say unless they have your exact gen and AC combo. Sorry.
*also, Im not really that familiar with the Yamaha. Are you saying that the generator's inverter runs off the coach batteries too? (uses battery power to supply the inverter to invert from DC to AC) The gen puts out AC, then turns it to DC so it can then turn it back to AC through the inverter, which will be able to supply 120 volts no matter the rpm of the generator motor.
If so, then you will need very big and very short battery cables supplying the generator.
