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Old 08-23-2015, 11:12 AM   #1
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Use Golf Cart Batteries for Chassis Battery

I already have 4 golf cart batteries for my coach. I have 735 watts of solar. I boondock a lot. I need more battery, I am a power hog. I was thinking about swapping out my chassis battery for 2 golf cart batteries, I can install a manual tie in switch to use while boondocking to give 6 batteries, for about 660 Amp hours instead of 440. That would give me 330 usable Ah instead of only 220 Ah.

Will the batteries supply enough power to start my 8.1L even at 1/2 charge. I have 5500 generator and a toad with me all time so if I messed up I could always jump it off if I need to.
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Old 08-23-2015, 12:11 PM   #2
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mg,

Chassis batteries needs the "cold cranking amps" to turn over the motor, where as house batteries are for a slower rate discharge. I tried using a golf cart battery for jumping my rv in an emergency situation once, they did the job, but the cranking was slow.

Do you have an empty bay nearby that you can add more batteries in?

Best of luck.
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Old 08-23-2015, 12:21 PM   #3
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There is no doubt in my mind that a pair of GC2s or T105s will crank an 8.1, but don't crank for more than about 15 seconds. The power density is great, but the demand load capability is not so great. If you give them a rest so electrolyte can circulate, they will be back at power in short order. I set up more than a few diesel yachts to start one GC2s and they always worked just fine. That is until the depression made them sell the boat.

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Old 08-25-2015, 07:55 AM   #4
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It can be done but I wouldn't, you engine likes higher CCA to start. I would look for a close storage to put more batteries in as stated above, that would also keep the battery cables shorter.
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