Author Topic: Adding batteries, worried any Bay weight capacity  (Read 187 times)

Offline neoneddy

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Adding batteries, worried any Bay weight capacity
« on: March 16, 2019, 08:39:35 PM »
I found a thread about using back bay for water, which I do, 150 gal worth.

I use my middle bay for general storage and electrical, including batteries.  Right now I have  4 golf cart batteries , weighing 260 lbs total.

I purchased 6 12v UPS AGM batteries weighing 130lbs each, that would be 780 lbs. The weight overall doesn't worry me, the density does. These are tall skinny batteries.

Any reason I can't swap these in?  Total coach weight is around 33,000 lbs as-is.
Raising hell in Ham Lake, MN

1982 MCI MC9

6V92 / 4 Speed Auto (HT740) Video Build Log - Our Bus Conversion Website

Offline richard5933

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Re: Adding batteries, worried any Bay weight capacity
« Reply #1 on: March 17, 2019, 03:58:57 AM »
Two questions..

Do you know the individual axle weights on your current setup?
Do you know the side-to-side weight (individual axle end weight)?

Assuming that he additional weight wouldn't put you over the weight limit for your axles and that it would still allow a large enough margin for safety, my only concern would be how it affects the side-to-side balance of the bus.

Can those AGM batteries be installed lying down flat or must they remain standing? If they're designed for either position you could build a false floor to lay them under and still have lots of usable space above them.
Richard
1974 GMC P8M4108a-125 (Current Bus)
1964 GM PD4106-2412 (Former Bus)
Located in beautiful Wisconsin
KD9GRB

Offline buswarrior

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Re: Adding batteries, worried any Bay weight capacity
« Reply #2 on: March 17, 2019, 08:01:39 AM »
Carry on, you'll be fine.

Have a look underneath to see the reinforcing, and note the thickness of the plate used to make up the bay floor.

The only thing I would add is a piece of plywood, to smooth out the floor, the ribs always seem to disrupt my spacing...

Happy coaching!
Buswarrior
Frozen North, Greater Toronto Area

Offline neoneddy

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Re: Adding batteries, worried any Bay weight capacity
« Reply #3 on: March 17, 2019, 10:11:34 AM »
I want to say I was around 8k up front and 22k or so on the back, which means I'm missing 3k someplace, I'll need to find the CAT scale receipt.

My left to right weight is probably getting off, most of utilities are on the driver side, the new battery bank would be on that side as well, it would be a net gain of 500lbs or so.

I think I can mount these anyway but upside down. I saw many shipped laying down. I like the idea of keeping them upright to let me slide them in and out as I need if one goes bad or something.
Raising hell in Ham Lake, MN

1982 MCI MC9

6V92 / 4 Speed Auto (HT740) Video Build Log - Our Bus Conversion Website

Offline Ryker

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Re: Adding batteries, worried any Bay weight capacity
« Reply #4 on: Today at 05:47:58 PM »
I had a 1999 Airstream diesel pusher with huge AGM batteries that ran my coach for days. 2 years ago I was going over the Tehachapi Pass for a 4 day campout. Going down the pass, I hit a big bump and heard a huge crashing sound. My mind was racing as to what happened because I was still driving fine. Looked in the mirror and saw cars swerving out of my way with pieces of god knows what flying behind me. Pulled over to find my beautiful batteries smashed to bits but still hanging on by one cable. I got battery acid all over myself tossing them into different bays. Went to Costco and bought a couple batteries to get us through the weekend.

And this is one reason that I now own a bus. Motorhomes are just not durable.
1974 GMC P8M4905A-615

Offline bandsaw

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Re: Adding batteries, worried any Bay weight capacity
« Reply #5 on: Today at 08:28:09 PM »
Hello, I asked the Prevost factory conversion rep about their suggested weight limit per bay. He said they do not recommend putting more than 1,000 pounds in a bay.  I realize you are not converting a Prevost.  I changed my conversion layout based on his comment.

Thanks, Bandsaw.