| Author |
Message |
Ron Leiferman (Ron_In_Sd) (24.220.237.100)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, April 16, 2004 - 8:52 pm: | |
I am looking at an Onan 7.5Kw genset and I am wondering if it is large enough.
Here are some of my load items:
Basement air system. (That same system that Ronthebusnut sells.)
Lights.
Standard House 10cf frig manul defrost.
2 - TVs
2 - DishNetwork receivers
2 - Stereo/DVD systems
1 - Computer system with LCD monitor.
10 Gal Water Heater with electric option.
Standard outlets
Inverter/Charger for (TVs, Fridge, Computer, but not A/C)
Base on my figures I should be good but I would like real world views. |
John Rigby (24.174.238.253)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, April 16, 2004 - 9:46 pm: | |
Ron
No air?
John |
TWO DOGS (4.226.105.120)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, April 16, 2004 - 10:22 pm: | |
BIG ENOUGH ! |
Ron Leiferman (Ron_In_Sd) (24.220.237.100)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, April 17, 2004 - 12:08 am: | |
No A/C running off the inverter. I am running a basement air from Ronthebusnut and I also have the coach air. |
Sean Welsh (Sean) (64.81.73.194)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, April 17, 2004 - 12:50 am: | |
Ron,
You don't mention which inverter/charger you are using, which is an important factor here.
I don't know the specs on your basement A/C, but this sounds like it could be tight if you have a big charger. My charger, for example, can draw up to 4kw when bulk-charging. A/C loads for a full coach are typically in the neighborhood of 2kw when running (more when starting). The fridge can pull 1kw when running. Add a few lights, etc., and you can be pushing the limit.
If you have a good inverter, though, you can set it to jump in and help out (from the batteries) when needed to start large motor loads such as the fridge and the A/C. A good inverter will also tone back its battery charger when other demands require it, and will let you select a lower maximum on amps drawn by the charger. In this case, 7.5kw is probably "just right."
-Sean |
FAST FRED (63.234.21.81)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, April 17, 2004 - 5:16 am: | |
Plenty big enough , You may find underloading when not using two aircond compressors more of a problem, than overloads.
FAST FRED |
Jack Conrad (Jackconrad) (207.30.189.32)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, April 17, 2004 - 7:29 am: | |
We have the same basement air from RonthebusNut in our MC-8. we run it as well as the microwave and TV from a 6.5 Onan. You should not have any problems. Jack |
Bulldogie (69.4.194.128)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, April 17, 2004 - 7:55 am: | |
Is one basement air enough for a 40ft bus??? Most are only 23,000 BTU at best running full out. Wouldn't a 10k be better and after all that has been said on this board wouldn't a different gen set than Onan be better?? I keep hearing about a Wrisco is that supposed to be a better gen set? |
Tony (64.215.196.184)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, April 17, 2004 - 9:23 am: | |
Bulldogie
That would be ( Wrico International, LLC ) Diesel Generators and Coach Parts
Name and Addressee
Dick Wright
P.O. Box 41555
Eugene, OR. 97404
Ph. 541-744-4333
Tony |
Rodger in WA (64.70.24.67)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, April 17, 2004 - 10:17 am: | |
That's an adequate size. Better for it to be working at 50% or better than running nearly unloaded as can often be the case with the 12KW and larger units.
My 7KW Power Tech does fine with demands similar to yours, except we have two roof air units. In hot weather, when using 2 or more burners on the elec cooktop and two roof air units (a rare occurance), I shut down one roof air as a precaution. |
Jim-Bob (205.188.116.135)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, April 17, 2004 - 10:18 am: | |
We have 2 roof airs an RV fridge and no inverter with a 6.5 Onan but you didn't mention coffepot, toaster oven (1.2KW), etc.
When I set up the genset, I had to run at 100% load to set the Hertz. I turned EVERYTHING in the bus on & had to go get a 1500 watt room heater to plug in to get to 6.5 KW. In reality we NEVER use the bus this way, and are usually looking for stuff to run once the airs start to cycle & the water is hot.
If your bus is electrically complete except for the genset, run your max load on the shore cord & measure that with a clamp on ammeter. That will give you a real figure IF it's warm outside & your batteries need charging.
Diesel generators are happy up to 95% load & down to 30% is o.k. for long periods but less load than that will cause cylinder polishing & then increased oil consumption. |
Earl-8-Ky (207.162.163.19)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, April 17, 2004 - 10:28 pm: | |
I am useing a 7.5 Onan Diesel gen set. I have two roof airs an electric water heater 10 gal. House type fridge 30 amp conveter. and the other various goodies. I have never had any problems. Now have 1300 hrs. on it and have never had to add oil to it. Change the oil every 100 hrs. The 7.5 Onan diesel should be good for 10,000 hrs. |
Buswarrior (Buswarrior) (64.229.210.96)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, April 18, 2004 - 11:09 pm: | |
Hello Ron
I agree: 7.5 is big enough
I agree: with the cautionary note about your inverter and whether it can be taught to behave if you are putting a big charge in the batteries at the same time as everything else having to be on.
Earl, is that a quiet diesel you're running?
happy coaching!
buswarrior |