Eco-Worthy-US via eBay[ebay.com] has Eco-Worthy Bifacial 195W 12V Solar Panel for $99.99 - 15% w/ code FINDYOURFAVES at checkout = $84.99. Shipping is free.
About this product:
Bifacial solar panels are designed with a transparent back of 12BB solar cells, the back panel uses composite materials, the light transmittance up to 91.5%, the conversion rate of 23%, the power generation is 858Wh per day under ideal conditions, compared to traditional solar panels, the power can up to 33%.
Solar Technology: Monocrystalline
Weight: 20.48lbs/9.20kg
Max Power Current: 9.85A
Voltage: 12V
Features: All Daylight Conditions, Monocrystalline, Maintenance Free
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Eco-Worthy-US via eBay[ebay.com] has Eco-Worthy Bifacial 195W 12V Solar Panel for $99.99 - 15% w/ code FINDYOURFAVES at checkout = $84.99. Shipping is free.
About this product:
Bifacial solar panels are designed with a transparent back of 12BB solar cells, the back panel uses composite materials, the light transmittance up to 91.5%, the conversion rate of 23%, the power generation is 858Wh per day under ideal conditions, compared to traditional solar panels, the power can up to 33%.
Solar Technology: Monocrystalline
Weight: 20.48lbs/9.20kg
Max Power Current: 9.85A
Voltage: 12V
Features: All Daylight Conditions, Monocrystalline, Maintenance Free
i have bought 8 of these 2 at a time. I paid as much as $120 and as little as $95. And they have worked great (that's why i kept buying). They are shipped quickly and packaged well (never arrive broken for me). Be certain to confirm that they are the "bi-facial" version. Eco-Worthy sells multiple variants. $85 is a good price.
Does the technology exist to attach these to the roof of my car, such that I can run my air conditioner without draining the battery with the engine turned off?
Does the technology exist to attach these to the roof of my car, such that I can run my air conditioner without draining the battery with the engine turned off?
Does the technology exist to attach these to the roof of my car, such that I can run my air conditioner without draining the battery with the engine turned off?
give it a try and get back to us! you might want to get one of those power banks that jump your car just incase though
Does the technology exist to attach these to the roof of my car, such that I can run my air conditioner without draining the battery with the engine turned off?
Yes, but you would need an ac compressor that is operated with an electric motor like what is found in electric cars and hybrids like the Prius to operate with the engine off. You'd have to do some thermal math to figure out how big of an electric ac compressor you'd need to install, get a new serpentine belt for your car to not include the new ac compressor, and some wiring modification to have the cooling fans come on with the compressor and keep the cabin fans moving air without the vehicle turned to ON so as not to have the engine computer or fuel pump/systems drawing power. And this would be before you try to incorporate a solar panel power source.
So once you get all that sorted and can figure out your power draw needs, you'd probably need panels with 150% to 200% output of that so you have some buffer when you're not under perfect sunlight conditions. At this point you have several square feet of solar panels on top of your car that would probably look like a portable car port.
Does the technology exist to attach these to the roof of my car, such that I can run my air conditioner without draining the battery with the engine turned off?
Your circulation fan might run, but every vehicle air conditioning compressor I've ever seen has been driven by a belt. Without the engine on, your air conditioning compressor likely won't work.
Your circulation fan might run, but every vehicle air conditioning compressor I've ever seen has been driven by a belt. Without the engine on, your air conditioning compressor likely won't work.
I would think EV's are the exception to this rule. I believe they run off an inverter connected to the battery.
I would think EV's are the exception to this rule. I believe they run off an inverter connected to the battery.
OP mentioned having an engine so they're not using an EV. I'm honestly not sure how an EV powers their AC compressor. What you described sounds correct.
Last edited by mobilebyrd May 7, 2025 at 04:21 PM.
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Technically it's possible, but practically no.
Yes, but you would need an ac compressor that is operated with an electric motor like what is found in electric cars and hybrids like the Prius to operate with the engine off. You'd have to do some thermal math to figure out how big of an electric ac compressor you'd need to install, get a new serpentine belt for your car to not include the new ac compressor, and some wiring modification to have the cooling fans come on with the compressor and keep the cabin fans moving air without the vehicle turned to ON so as not to have the engine computer or fuel pump/systems drawing power. And this would be before you try to incorporate a solar panel power source.
So once you get all that sorted and can figure out your power draw needs, you'd probably need panels with 150% to 200% output of that so you have some buffer when you're not under perfect sunlight conditions. At this point you have several square feet of solar panels on top of your car that would probably look like a portable car port.
Your circulation fan might run, but every vehicle air conditioning compressor I've ever seen has been driven by a belt. Without the engine on, your air conditioning compressor likely won't work.
OP mentioned having an engine so they're not using an EV. I'm honestly not sure how an EV powers their AC compressor. What you described sounds correct.