navygm
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Joined: Sun May 10, 2015 12:46 pm
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Leaf roof solar panels?

Tue Aug 18, 2015 8:12 am

Anyone has any idea if this is possible to fit solar panels on the roof and charge while its parked outside?
I've been thinking about this idea for long as it could be very useful.

if there is someone who has experimented somehow I appreciate any information

Image

Graffi
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Leaf Number: 414757
Location: San Diego, CA

Re: Leaf roof solar panels?

Tue Aug 18, 2015 10:22 am

Solar on the roof of the car is to Expensive and not practical. It is so much more cost effective to plug in, and you can find lots of places to do that.

If your commute is less than 40 miles each way, then just plug in at home, and install a 240v circuit for that.

If your commute is greater than 40 miles each way, then you can offer to pay for the electricity at work. If you get 4.0 miles/kwh, driving 40 miles uses 10kwh. At an electricity rate of $0.15 per kwh, the cost is only $1.50 each day. You can adjust this cost for the rates in your area. At work you can offer to work an extra 5 minutes each day to cover the cost of the electricity you use. Heck, you can even offer to work 10 extra minutes.

The cost of electricity is so cheap that it is not worth spending $5,000 to install an EVSE at work that will track and bill the cost of electricity. For Work Place charging a 120v circuit is all that you need. To re-charge 40 miles will only take a little over 5 hours at that rate.

Hope this helps.
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Valdemar
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Re: Leaf roof solar panels?

Tue Aug 18, 2015 10:51 am

Would you pay several thousand dollars for the integrated solar panels that give you extra 3-4 miles of driving on a good sunny day? I know I wouldn't.
'11 SL, totaled
-1CB@33k/21mo, -2CB@53k/33mo, -3CB@68k/41mo, -4CB(41.5AHr)@79k/49mo, -5CB(38.85AHr)@87.5k/54mo
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davewill
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Re: Leaf roof solar panels?

Tue Aug 18, 2015 10:54 am

Been discussed ad nauseum on this site. Just search a little.

Summary: roof too small to do any good.,
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epirali
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Location: Maryland

Re: Leaf roof solar panels?

Tue Aug 18, 2015 10:54 am

navygm wrote:Anyone has any idea if this is possible to fit solar panels on the roof and charge while its parked outside?
I've been thinking about this idea for long as it could be very useful.

if there is someone who has experimented somehow I appreciate any information

Image


I am by no means a solar panel experts (I am guessing there are quite a few on this forum), but I can say the amount of electricity you could generate would in no way be sufficient for a practical charging application. I believe set ups like this are more something that can generate enough power:

http://www.wired.com/2014/10/envision-solar-ev-charger/

This is an amusing idea (not practical either):

http://cleantechnica.com/2013/02/26/sol ... ctric-car/

navygm
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Re: Leaf roof solar panels?

Tue Aug 18, 2015 12:02 pm

Thanks for all those replying back.
So to give more details in regards to the answers i got,
I was thinking of this idea so during my day shift of 12hrs at work I would not waste all that sun ;)
At work they dont want to provide a plug so If needed i can charge the car :/
By d way.. I have 30km both ways as daily route to work.

These type of flex panels I can buy them for a few hundred dollars and would produce about 200watts if i cover whole roof..so in a day i would be able to get some free energy :)

That was my idea

Valdemar
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Re: Leaf roof solar panels?

Tue Aug 18, 2015 2:16 pm

navygm wrote:I was thinking of this idea so during my day shift of 12hrs at work I would not waste all that sun ;)


If you own the car and do not expect to qualify for battery replacement under the capacity warranty you want to park your car in the shade.
'11 SL, totaled
-1CB@33k/21mo, -2CB@53k/33mo, -3CB@68k/41mo, -4CB(41.5AHr)@79k/49mo, -5CB(38.85AHr)@87.5k/54mo
-0CB(66.14AHr)@87.5k/54mo (BBB)
60.5AHr, SOH 94%, 105k miles
9kW Solar

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keydiver
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Re: Leaf roof solar panels?

Tue Aug 18, 2015 4:43 pm

As someone else already said, even 200 watts of panels will only make about 1 kWh of power per day at most, enough to get you maybe 2-4 miles down the road, not counting any charging losses. The big problem with the panels would be that the voltage would need to be stepped up and regulated, then connected directly to the 400 volt battery, which can be VERY dangerous if not done properly.
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cwerdna
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Re: Leaf roof solar panels?

Tue Aug 18, 2015 4:48 pm

davewill wrote:Been discussed ad nauseum on this site. Just search a little.

Summary: roof too small to do any good.,

Yep.

viewtopic.php?t=6316

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GRA
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Re: Leaf roof solar panels?

Tue Aug 18, 2015 6:13 pm

Just to get an idea of what it really takes to make car-mounted solar panels semi-viable, via ABG:
Immortus solar EV will have unlimited range, not unlimited speed
http://www.autoblog.com/2015/08/18/immo ... ted-speed/

Oh, driving in a mid latitude desert country helps too.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.

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