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I noticed the pre heating and HVAC in the bolt uses a lot of energy (3-8k watt while not driving). I figured these 2 products could be used to offer an alternative to keeping my feet warm without using up so much energy;
500 watt inverter
POTEK 500W Power Inverter / Car Converter DC 12V to 110V Dual AC Charging Port and 2A USB ports for Laptop, Smart Phone https://www.amazon.com/dp/B01MR569GA/ref=cm_sw_r_cp_apa_RQ3FAbAD6754G
And mini 200 watt heater
Lasko #100 MyHeat Personal Ceramic Heater https://www.amazon.com/dp/B003XDTWN2/ref=cm_sw_r_cp_apa_0U3FAbK091TT2
The first try it overloaded the amazon purchased inverter and it smelled like burnt electronics in about 5 seconds flat.
For my second try I went to Walmart and bought a Walmart brand inverter with a LCD screen. Ever start 400w
Everstart 400W LCD Power Inverter

http://www.walmart.com/ip/Everstart-400W-LCD-Power-Inverter/189309462

This time my agm battery read only about 12.8 v with nothing plugged into the inverter. I turned the heater on and it lasted only about 10 seconds before it caused the low battery voltage alarm to sound , reading about 10.5 v and shut off ac power. It would come back on after about 5 seconds and repeat the above behavior. I noticed after I returned the inverter to Walmart and went to start the car the center bolt screen seemed to take about 15 seconds before it went to the home screen- much longer than usual.
My questions; Is the inverter not working long a sign of a bad agm battery? Am I expecting too much out of the inverter/cigarette plug? Also has anyone here had any luck using a power inverter with a mini heater in the bolt? Thanks in advance.
 

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Yeah, that sounds dangerous. Even at the max voltage and current of that outlet, that's 15A x 12V = 180 watts which is paltry for convection heating with air. You're better off with heated seats and steering wheel. Aftermarket heated steering wheels are terrible with their cable hookup, but heated seat pads and blankets are a great alternative:

[ame]https://www.amazon.com/Cushion-Levels-Cooling-Heating-SL26A8/dp/B071DN282D/ref=sr_1_4?ie=UTF8&qid=1518340195&sr=8-4&keywords=cooling+car+seat[/ame]

[ame]https://www.amazon.com/Heated-Fleece-Travel-Electric-Blanket/dp/B000V8QVX6/ref=sr_1_3?ie=UTF8&qid=1518340009&sr=8-3&keywords=car+heating+blanket[/ame]

I personally a zonetech cooling seat cushion for the summer and it does help with butt and back sweat where HVAC can't get to. The fan is a bit loud but nothing too bad. For your heating needs, I think the plugin blanket would be perfect to drape over your torso down to your knees. Follow that up with a seat belt and you should be golden. Just don't let the blanket drape below your knees or you risk interfering with your driving footwork.

I'd double check the wattage for each of the above if you decide to combine them to roast yourself on your commute. Someone for the blanket claimed it consumed 48W which surprised me, my cooling seat pad consumed that much on its "high" fan setting.
 

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I would also make sure those cheap inverters have adequate fusing. If the inverter tries to draw too much power and doesn’t have a decent fuse circuit you’ll either fry the inverter, or trip the lighter fuse, or both.

Why not just use the Bolt’s heating system and direct it to the floor. That’s a lot easier, and I doubt the scheme you’ve come up with will save any battery power. Watts are watts, whether they’re directed to an accessory heater or the Bolt’s heater.
 

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Running an inverter to 120 volts, and making smoke as soon as you plug it in, may be making as much heat in the inverter and wiring as the output at the heater! Plus 120 volt anything in a jury rigged system inside the car with you seems like an avoidable shock hazard.

Running direct to a 12 volt heater is simpler.

I searched Amazon on '12 volt car heater'. Nearly all reviews said awful, don't bother. (One review said "adds as much heat as bringing a steaming hot cup of coffee!")

Here's the first one I noticed with decent reviews.
Portable Car Heater, Ferryone 30 Seconds Fast Heating Defogger 12V 150W Heater Cooling Fan

(Hmmm, strange formatting)

As TimBolt said just using the car's system probably works better.
 
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