5 Air Conditioners?
On some of the big bus-based Class A's going down the road, I see what looks like 5 A/C units on top. Are they all A/C's?
Forum Discussion
bshpilot wrote:
univmd wrote:
gemert wrote:
How many batteries and how long do you expect them to last before you fire up the gennie?
MM's new coach will have multiple alternators that charge the lithium inverter batteries, so the generator never has to be on.
like this ;)
Yes, ours will be similar to that picture. We'll have 4 alternators from what I understand and there are 3 Lithium Ion batteries. The Li batteries have a life span of 10 yrs. and can be rebuilt vs. replacement at a much cheaper cost. The current cost is $7K per battery.
I don't plan to run the air on the batteries very often as I think it is a good idea to run the genny as it needs exercise. We'll never put the hours on it that would require a rebuild.
MM.univmd wrote:
gemert wrote:
How many batteries and how long do you expect them to last before you fire up the gennie?
MM's new coach will have multiple alternators that charge the lithium inverter batteries, so the generator never has to be on.
like this ;)gemert wrote:
Mr.Mark wrote:
Snowman, I would say they are all air conditioners. There is a guy on the Prevost site that I read that is building (or wants to) a new entertainer bus (he's a driver/owner). He wants 7 air units as his clients want to be comfortable all of the time.
It's not that they need all of them on at one time, but if one or two go out, they will have plenty of air to keep the clients happy. It could also be that this guy will have a larger generator to run all the units if needed.
Our new coach will have 4 roof airs and I can run all of them off of the inverters going down the road as we'll have four 3,500 watt 24 volt Outback Sine Wave Inverters.
MM.
How many batteries and how long do you expect them to last before you fire up the gennie?
MM's new coach will have multiple alternators that charge the lithium inverter batteries, so the generator never has to be on.Mr.Mark wrote:
Snowman, I would say they are all air conditioners. There is a guy on the Prevost site that I read that is building (or wants to) a new entertainer bus (he's a driver/owner). He wants 7 air units as his clients want to be comfortable all of the time.
It's not that they need all of them on at one time, but if one or two go out, they will have plenty of air to keep the clients happy. It could also be that this guy will have a larger generator to run all the units if needed.
Our new coach will have 4 roof airs and I can run all of them off of the inverters going down the road as we'll have four 3,500 watt 24 volt Outback Sine Wave Inverters.
MM.
How many batteries and how long do you expect them to last before you fire up the gennie?bshpilot wrote:
Effy wrote:
So what kind of service is required at a CG? No way 50a can handle that draw.
i did some testing just today after I installed a onan autostart EC-30w....I was exercising our Onan QD10KW generator & loading it as much as i could....watching my panel meters.
w/ BOTH my ac's on, with the fans on HI, the microwave running AND a k-kups coffee maker i was barely able to load my system w/ 50 amps TOTAL (and that was 30A on one leg & 20A on the other).
Ive drained my water heater so i couldn't add that to the mix or i would have turn the electric elements on also.
According to Onan's spec's the QD10 Will operate with three 15000 Btu air conditioners and an additional load of up to 4000 W
Onan's 18kw is rated at 150A - enough to operate with four 15000 Btu AC's with 4500 W to spare.
Don't forget when we say 50 amp coach we are talking 2 X 50 amp circuits for a total of 100 amps.- Why would they be heat pumps only? I have never see just a roof mounted heat pump. Most roof mounted AC units also act as a heat pump.
I have been in two of Taylor Swift's buses, nothing special about them, just bunks, some tv's a bar and some couches Effy wrote:
So what kind of service is required at a CG? No way 50a can handle that draw.
i did some testing just today after I installed a onan autostart EC-30w....I was exercising our Onan QD10KW generator & loading it as much as i could....watching my panel meters.
w/ BOTH my ac's on, with the fans on HI, the microwave running AND a k-kups coffee maker i was barely able to load my system w/ 50 amps TOTAL (and that was 30A on one leg & 20A on the other).
Ive drained my water heater so i couldn't add that to the mix or i would have turn the electric elements on also.
According to Onan's spec's the QD10 Will operate with three 15000 Btu air conditioners and an additional load of up to 4000 W
Onan's 18kw is rated at 150A - enough to operate with four 15000 Btu AC's with 4500 W to spare.- The 5 A/C coaches (and yes, they are all A/C's whether they can also be used for heat or not) are going to be found on entertainer buses. They run off generator power and usually have 2 generators on board to ensure there is no possibility of a no power scenario. A 20K generator will provide 166 amps (not just 100 as could be found by plugging into a 50 amp circuit at a campground) and provide more than enough power to keep the A/C units running. We did some work for Willie Nelson's tour bus so I am not speculating here.
- These rigs seldom connect to the grid, unless they are close enough to the theater to wire into one of the 200-300 amp show panels. They usually park with the generator running. No hookup at the theater I work, the lighting guys use up all the capacity of the show panels. Sometimes rent big generators.
You are thinking RVer, camping, campgrounds. The people who are guests in these rigs, that's not who they are. The transportation companies operating them, they are not RVing either, and their rates are certainly high enough that the businesses paying are paying cost plus plenty. - Okay, so if a typical overhead is 15 amps, what in the world do they plug in to? They must have a long cord to the grid. :)
