So I tore out my subwoofer to make room for a 50ah lithium battery for a secondary battery system to run my camp lights, chargers and a few other things. I've been thinking about how to keep that area cool. Today was a nice day in San Diego but of course direct heat on a car even on a cool day can lead to high temps in a car, and even hotter inside the body cavity. I'm trying to think of a way to effectively insulate and also possibly actively cool this area...
Today, I had my temp probe in the cavity with the subwoof panel closed and it got to 103F. No real insulation at the moment besides a few sheets of sound deadening that I had lying around.
I'm not actively charging the battery at the moment. I have my OEM amp still there to power the rest of my speakers but once I get a chance to rewire/bypass the amp, i will remove it and put in a DC-DC/MPPT charger (renogy) in there to keep my house battery topped off.
I ordered some PC fans and a temp sensor/controller to see if that could help by piping in air from the car but not sure how much that would help since it would be hot in the car anyways.
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2003 4Runner Limited 4wd V8. JBA UCA, Dobinsons MRA Front Coilovers, Dobinsons MRA Long Travel rear. Cooper AT3 XLT 285/70R17

91 Ext Cab 4x4 Yota, black with 4" front IFS trailmaster lift, 3" Downey rear springs, Downey Rubicon extended shackles, and 2" body lift. 35" BFG M/T w/ 4.56. Centerforce II clutch, Rancho 5000s all around and Rancho traction bar, K&N Air filter, Flowmaster, ARB Rear Diff Air Locker, Custom "Mad Eyes" light covers, Extended Diff Breathers, Hella Vision Plus Headlights. [SOLD]