Overweight!
Hotshot
Joined: Oct 2015
Posts: 19,693
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From: Wyoming
The swap from lead acid to LiFePO₄ is a very good start. The 12v 280Ah LiFePO₄ batteries that I built weighed in around 52 lbs each including the BMS, cabling and compression fixture. The equivalent Ah lead acid battery would be about 180 lbs.
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Fleet Mechanic
Joined: Feb 2023
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I'm pretty sure those multiple pad Cat scales aren't that precise.
As long as the front tires are on the steer axle pad and the rear tires are on the drive axle pad the numbers will probably be close enough.
I believe they also have a free reweigh option as long as you do it within 24 hours, so you could reposition it on the scale and see if the numbers change.
If your rear tires are rated at 8000 lbs. I probably wouldn't bother with weight reduction, just try to move some to the front for better centerr of gravity.
Are those aftermarket wheels rated that high?
As long as the front tires are on the steer axle pad and the rear tires are on the drive axle pad the numbers will probably be close enough.
I believe they also have a free reweigh option as long as you do it within 24 hours, so you could reposition it on the scale and see if the numbers change.
If your rear tires are rated at 8000 lbs. I probably wouldn't bother with weight reduction, just try to move some to the front for better centerr of gravity.
Are those aftermarket wheels rated that high?
Wheels are rated to 3700lbs and thanks for posting 👍
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Fleet Mechanic
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Hotshot
Joined: Oct 2015
Posts: 19,693
Likes: 12,817
From: Wyoming
If you had 300 Ah of lead acid, you could get by with just 150 Ah of LiFePO₄. Lead acid batteries shouldn't be discharged below 50% state of charge. So 300 Ah of lead acid has only 150 useful Ah. LiFePO₄ can go down to 0% without harm, though the lights do tend to go out.
So you may be able to get by with fewer LiFePO₄ Ah than you think.
So you may be able to get by with fewer LiFePO₄ Ah than you think.
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Fleet Mechanic
Joined: Feb 2023
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If you had 300 Ah of lead acid, you could get by with just 150 Ah of LiFePO₄. Lead acid batteries shouldn't be discharged below 50% state of charge. So 300 Ah of lead acid has only 150 useful Ah. LiFePO₄ can go down to 0% without harm, though the lights do tend to go out.
So you may be able to get by with fewer LiFePO₄ Ah than you think.
So you may be able to get by with fewer LiFePO₄ Ah than you think.
Laughing Gas
Joined: Mar 2008
Posts: 1,031
Likes: 510
Personally, I would not worry about gross weight, with that rig.
I would argue that your GVWR is 14,800 (3700X4) and per your scale ticket you're at 10,800.
Maybe try to shift a little more weight to the front axle, but thats about it.
I would argue that your GVWR is 14,800 (3700X4) and per your scale ticket you're at 10,800.
Maybe try to shift a little more weight to the front axle, but thats about it.
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Fleet Mechanic
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More Turbo
Joined: Jun 2014
Posts: 749
Likes: 93
From: Pagosa Springs CO.
Op, when you're doing your thing on or off road does the backend feel heavy?
I believe, if you do the basic weight elimination, batteries and moving a few things forward you should be fine.
do have a wet bath? That adds a lot of weight, my 8.6 hardside sun lite, wet, weighs 1830 . 22gal fresh water.
no water heater, no gray tank, 10 gallon black water tank. 1 20# lpg tank, I bought it this way.
it's not for everybody but it scratches the itch.
I believe, if you do the basic weight elimination, batteries and moving a few things forward you should be fine.
do have a wet bath? That adds a lot of weight, my 8.6 hardside sun lite, wet, weighs 1830 . 22gal fresh water.
no water heater, no gray tank, 10 gallon black water tank. 1 20# lpg tank, I bought it this way.
it's not for everybody but it scratches the itch.
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Fleet Mechanic
Joined: Feb 2023
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Op, when you're doing your thing on or off road does the backend feel heavy?
I believe, if you do the basic weight elimination, batteries and moving a few things forward you should be fine.
do have a wet bath? That adds a lot of weight, my 8.6 hardside sun lite, wet, weighs 1830 . 22gal fresh water.
no water heater, no gray tank, 10 gallon black water tank. 1 20# lpg tank, I bought it this way.
it's not for everybody but it scratches the itch.
I believe, if you do the basic weight elimination, batteries and moving a few things forward you should be fine.
do have a wet bath? That adds a lot of weight, my 8.6 hardside sun lite, wet, weighs 1830 . 22gal fresh water.
no water heater, no gray tank, 10 gallon black water tank. 1 20# lpg tank, I bought it this way.
it's not for everybody but it scratches the itch.
I'll do some repositioning and weight reduction this weekend and report back
Fleet Mechanic
Joined: Sep 2006
Posts: 1,491
Likes: 295
From: Fresno, CA
Curious where you are getting this number from? My F250 is rated at 6100 for the rear but that might be "derated" since it's an F250.
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Fleet Mechanic
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