Generator Size?

Jcparmley · April 15, 2018, 08:35:31 PM

Hello

I am beginning the process of my MCI 102c3 build. I have a Onan Emerald 3 generator which is 6.5 kW. I have a opportunity to purchase a 12.5 kw Winco Generator for $800.00. I plan on using the bus mostly at parks with shore power but could see myself parking for a night at Walmart while traveling. I am planing on using a mini split system for AC. What are your thoughts? Should I stick with the Onan or go big with the Winco for $800.00. Thanks

Jared

eagle19952 · April 15, 2018, 08:44:06 PM

Gasoline

no decibel rating

15 gallon tank...

that's 3 strikes.

silversport · April 15, 2018, 10:11:32 PM

From what you say I would stick with the 6.5. I have a 8 k and it is more then I need, I am not an all electric coach. Bigger means more noise, could have more vibration, and take up more bay space.
Robert
1962GM 4106

richard5933 · April 16, 2018, 03:23:17 AM

If you don't go for the Wrico - I'll jump on it.

In my book it's better to have the 12.5kw than be cursing an undersized unit when on a trip with unexpected lengthy boondocking.

Please pass on the information if you decide to pass on the Wrico.

buswarrior · April 16, 2018, 05:49:42 AM

Generator size is driven by electrical system design, and by the way you plan to camp.

Otherwise you get one the wrong size, and ruin it.

And do NOT ignore the sound rating. No one wants to be your friend if your generator interrupts their sleep... in fact, you will get run out by a mob...

Some people are very happy and comfortable with 4000 watts. Some people can't function with less than 20 000 watts.

It's all about design and use.

Happy coaching!
Buswarrior

lostagain · April 16, 2018, 06:58:06 AM

Our bus came with a 6.5 kw. It is ok most of the time. It will run the 2 roof ac units, barely, as long as nothing else is on. Driving in the winter, it is not enough to run the 2 block heaters in the morning, and a couple of electric heaters, and cooking breakfast all at the same time. We had to do that a month ago on the way North when the propane furnace wasn't working. I would definitely go for the 12.5 kw. You have to build your bus to be able to handle all conditions.

JC

dtcerrato · April 16, 2018, 07:01:22 AM

We've run a 6.5 Onan for three decades on our bus, never needed anything bigger, yea you can here it but is easy to talk over - no big deal to us or really anyone else in all those years, just our 2 cents...

DoubleEagle · April 16, 2018, 08:00:49 AM

Condition of each is a big factor, as well. The Onan's have been a good brand, but it will be noisier, etc. A $800 12.5Kw might have problems and be on it's last gasp, unless it is an unusual bargain and the owner owes you a favor. I would keep looking around, and figure out exactly how many watts you really need. A generator is something that needs to be dependable, you do not want it to conk out when it is hot and humid and you are trying to get sleep.

TomC · April 16, 2018, 08:27:00 AM

I had an 6.5kw Onan Emerald III commercial (had a PTO shaft coming out the rear of the generator that I powered an auto type A/C compressor for my sleeper) in my truck. The first one lasted 12,000 hours-mainly because everytime it was on, I also had my 1,500 watt block heater so always a load. Plus regular oil changes. I would choose the 1,800rpm Onan Emerald III over the 3,600rpm Winco anyday.
If you're going to be using the bus alot, get a Diesel genset-no other more reliable-plus uses the same fuel. Good Luck, TomC

eagle19952 · April 16, 2018, 09:54:59 AM

Quote from: richard5933 on April 16, 2018, 03:23:17 AM
If you don't go for the Wrico - I'll jump on it.

In my book it's better to have the 12.5kw than be cursing an undersized unit when on a trip with unexpected lengthy boondocking.

Please pass on the information if you decide to pass on the Wrico.

He said WINCO....

https://www.wincogen.com/

Utahclaimjumper · April 16, 2018, 10:12:32 AM

No worse noise maker than a construction type generator.>>>Dan

Oonrahnjay · April 16, 2018, 10:12:48 AM

Quote from: eagle19952 on April 16, 2018, 09:54:59 AMHe said WINCO....

https://www.wincogen.com/

OK, the "quiet" issue just left the building ...

luvrbus · April 16, 2018, 10:13:55 AM

Witha generator you need to factor in altitude and heat that is in your area,in AZ at 115 degrees a 10kw wouldn't run 2 roof tops with out a struggle forget about 3 AC's

richard5933 · April 16, 2018, 10:51:14 AM

Old eyes & late hours. My mistake. That does change the conversation, doesn't it.

DoubleEagle · April 16, 2018, 11:29:59 AM

And I assumed the 12.5 Kw was a diesel! Keep looking if you need something bigger.