Dual battery setup in 1997 4runner - Page 4 - Toyota 4Runner Forum

Fyrmanbruce · 05-19-2021, 06:55 PM

When cutting the fan shroud, it alters the airflow. Did you notice any changes in how it cools?

JohnMc · 05-20-2021, 08:50 AM

Quote:

Originally Posted by Fyrmanbruce

When cutting the fan shroud, it alters the airflow. Did you notice any changes in how it cools?

My wife notched the corner of her shroud when she put in her dual full-sized batteries on her '96. No issues with overheating, even when driving in UT in the summer with the A/C on full blast and 105 degrees outside.

I did something a bit different when I did mine more recently - used a tiny start battery and a full sized deep cycle house battery in the usual spot:

No moving, no cutting, and very little added weight.

Bad Luck · 05-20-2021, 11:26 AM

Quote:

Originally Posted by JohnMc

My wife notched the corner of her shroud when she put in her dual full-sized batteries on her '96. No issues with overheating, even when driving in UT in the summer with the A/C on full blast and 105 degrees outside.

I did something a bit different when I did mine more recently - used a tiny start battery and a full sized deep cycle house battery in the usual spot:

No moving, no cutting, and very little added weight.

Do remember what CCA's those batteries were? I really like the idea

JohnMc · 05-21-2021, 09:48 PM

Quote:

Originally Posted by Bad Luck

Do remember what CCA's those batteries were? I really like the idea

I think they're rated at something like 300 - 360? Certainly a bit low for a single battery and year-round use. But with a two-battery setup - if the little battery isn't quite enough, just link and crank with the big deep cycle one.

I finished this up in late Feb this year, so it didn't see any deep winter cold yet.

Works perfectly fine in normal weather, though.

zacharyallott · 10-21-2021, 06:17 PM

Is this the setup you used?

Braille B2015 AGM 425 CCA Lightweight Battery Master Install Kit

JohnMc · 10-21-2021, 09:15 PM

I used a B14115 battery, and a Blue Sea 7622 automatic charging relay. It has a remote switch for inside to manually connect and disconnect as needed, but normally you don't need to touch it.

I've been using that setup ever since early March. No issues so far, but I have run the start battery down a couple of times when I left something on overnight. It will certainly run down faster than a full sized battery. But then I just hit the manual connect on the dash switch, it connects to the yellow-top, and it starts normally, then switch it back to automatic.

RotaryDreamz · 10-22-2021, 06:08 PM

Quote:

Originally Posted by JohnMc

I used a B14115 battery, and a Blue Sea 7622 automatic charging relay. It has a remote switch for inside to manually connect and disconnect as needed, but normally you don't need to touch it.

I've been using that setup ever since early March. No issues so far, but I have run the start battery down a couple of times when I left something on overnight. It will certainly run down faster than a full sized battery. But then I just hit the manual connect on the dash switch, it connects to the yellow-top, and it starts normally, then switch it back to automatic.

I really like your idea. Curious what you are running to make you want to go dual setup, if you don't mind sharing. I mainly need it for when I'm camping or hunting, so I don't have to keep bringing my Honda generator and extra gas with me everytime. Would save me alot more space this way. Thanks.

JohnMc · 10-23-2021, 07:14 PM

Not all that much for now, but I'll keep adding things. Currently I have the air compressor and winch and some of the added lighting running off the house circuit.

Also just as a fail safe if I'm out in the back country and leave something on over night.

Site Navigation