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Old 03-27-2018, 02:57 PM   #1 (permalink)
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Wind or solar powered DRLs?

I originally was planning on adding DRLs to my Honda Civic, until I realized they created added drain on the alternator, resulting in slightly reduced fuel economy (I know it's splitting hairs, but still ).

But what about DRLs that are solar powered or powered by a turbine?

An example would be these: 8 LEDs Car DRL Daytime Running Light Use Wind Power

I'm sure they could be done as a DIY project if someone had the know-how too.

Any thoughts? Effect on FE or drag?

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Old 03-27-2018, 03:29 PM   #2 (permalink)
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Quirkily cool, but whats the benefit? Is there any light output on them or is just to say you have drl's (ex: nissan sentra low output drl on halogen headlights).
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Old 03-27-2018, 03:29 PM   #3 (permalink)
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Not an answer directly to your question, but, how much does it cost to replace a car from an accident?

To me, there is no compromise on safety equipment.

40w worth of drl's isn't going to break the bank. If you're concerned with alternator load, add a solar panel and charge controller. But, keep in mind those components are going to cost significantly more than you will save.
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Old 03-27-2018, 03:51 PM   #4 (permalink)
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DRL's will add a minuscule load, and if they are LED, it is negligible.
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Old 03-27-2018, 03:53 PM   #5 (permalink)
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Wind turbines collect energy by adding drag, and it will necessarily be larger than the energy savings of not running from the alternator.

EDIT: But those are really cool.
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Old 03-27-2018, 04:27 PM   #6 (permalink)
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Solar power on cars is pointless unless the purpose is to trickle charge the battery to keep it healthy. Wind would be even worse since you would only run it when parked, and that defeats the point of DRLs.

I'd throw some low wattage DRLs in, or disconnect them entirely. I find constant DRL replacement to be annoying, and I ride motorcycles, so the minute safety benefit of running them isn't worth it to me. I'll probably die of cardiovascular disease or cancer, just like everyone else.
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Old 03-27-2018, 05:21 PM   #7 (permalink)
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With the color of your car a couple of 4 in. strips of florescent orange tape on the bumper would be visible. We see fleet vehicles this way.
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Old 03-27-2018, 06:18 PM   #8 (permalink)
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This is sorta interesting. Using a windmill to charge the battery is a losing proposition, but adding drag to power the light directly might be a wash.

Now I'm wondering about anti-deer whistles.


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Old 03-27-2018, 07:48 PM   #9 (permalink)
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If you place the wind turbine in a location that needs less air flow then the parasitic loss would not off set the gane. like using the Electric fan sitting there windmilling as you go down the highway. Some kind of storage, (for when the fan is needed)
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Old 03-27-2018, 08:55 PM   #10 (permalink)
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The minuscule amp draw from an LED running light could just about be offset by running the instrument panel lighting at a lower brightness (assuming that they’re incandescent lights)...

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