Don
Site Moderator
Posts: 2754
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: solar on the car roof

Fri Jul 27, 2012 10:36 am

iMiEVNZ7 wrote: . . . . the ImiEv uses approx 16 Kw per Hour.
. . . . a trailer that is 35.5 Metre long.
If you made that trailer completely out of high dollar aluminum, you could maybe keep the weight down to only 1,000 pounds or so. Even if you could legally tow a trailer longer than 100 feet, the aforementioned 16Kwh would probably be cut in half towing it, so the trailer would need to be 150 feet long . . . . and so it goes ;)

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2017 Chevy Volt Premier
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1979 Honda CBX six into six

fjpod
Posts: 529
Joined: Tue Apr 17, 2012 2:31 am
Location: NYC

Re: solar on the car roof

Fri Jul 27, 2012 11:12 am

Don wrote:
TaosEV wrote:Or you could just buy a Volt.
If I was in his position, with mandatory freeway commute, the extended range he needs and the inability to recharge at his place of employment, that's exactly what I would do - That's the scenario the engineers at GM designed the Volt to meet

Our Mitsu was never aimed at people who needed a 100 mile range, nor those who needed to keep up with freeway traffic which is why it was possible to make it as light, nimble, compact and inexpensive as it is - It's an urban econobox, plan and simple . . . . some of us may drive it in the coutry most of the time, but it was still designed primarily for urban use. Trying to re-engineer it to be something else will be a difficult and less than satisfactory proposition I think, not to mention that in the end, you'll likely have enough $$$ in your jury-rigged Mitsu to have bought something which was designed from the gound up to meet your needs

Don

+1

Don
Site Moderator
Posts: 2754
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: solar on the car roof

Fri Jul 27, 2012 11:21 am

Don wrote:If you made that trailer completely out of high dollar aluminum, you could maybe keep the weight down to only 1,000 pounds or so.
I guess not - The panels alone would weigh more than 3X that, so the trailer would likely outweigh the car by 2X or more

This is beginning to sound as impossible as perpetual motion :D

Someone did make a solar airplane which can fly on any sunny day . . . . but they didn't start with a 2500 pound car ;)

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2017 Chevy Volt Premier
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1979 Honda CBX six into six

PV1
Site Moderator
Posts: 2931
Joined: Fri Apr 27, 2012 4:22 pm
Location: Pittsburgh, PA
Contact: Website

Re: solar on the car roof

Sat Jul 28, 2012 7:01 pm

How has the thread swung way off topic? The topic is putting solar on the i, and at least up to the mention of ICE's, it has stayed on topic. I probably hi-jacked the thread, but it's still on topic. The 35.5 meter trailer is how much solar power is required to run the i on the highway without running the battery down, sort of like a hybrid's 'charge-sustaining' mode. This would be great to drive across a state, but would be way overkill for anything under 200 miles.

I posted my situation because it fit the scenario for putting solar on an i. I will be changing work locations soon because we were contracted to installed a distributed antenna system, and are almost done. My plan for a car is a solar car (designed around the solar array). It would have a 1,000 watt solar array, enough battery capacity to travel a real 150 miles, plus whatever solar kicks into the system. It would also weigh less than 2,000 lbs, and only have three wheels. I've gotten to the point where the design plan is 99% complete. http://home.earthlink.net/~timster/id11.html

Since I'm on the topic, if an outlet would be available for me to use (level 1 or 2), would it still make little sense to drive an i and not buy a Volt or something?
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013

"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015

"Photon" - 2017 Bolt EV LT in Orange with QC - 7/31/2017

Solar-powered since 10/10/2013

JoeS
Site Moderator
Posts: 3555
Joined: Thu Dec 15, 2011 5:47 am
Location: Los Altos Hills, California

Re: solar on the car roof

Sun Jul 29, 2012 10:04 am

PV1 wrote:How has the thread swung way off topic?... Since I'm on the topic, if an outlet would be available for me to use (level 1 or 2), would it still make little sense to drive an i and not buy a Volt or something?
PV1, as has been mentioned in many places on this forum, if you have a 40-mile one-way commute you will have no problem at all driving an iMiEV if you can charge using 120v Level 1 during the day. Level 2 charging at work would be overkill. I would, however, install Level 2 charging at home to ensure a "full tank" every morning.
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

PV1
Site Moderator
Posts: 2931
Joined: Fri Apr 27, 2012 4:22 pm
Location: Pittsburgh, PA
Contact: Website

Re: solar on the car roof

Wed Aug 01, 2012 7:48 pm

Level 2 at home definitely. That's what the purpose of having solar and extra batteries on the car is to ensure you can soak up an extra 8 kwh to make it back home. If there are outlets available, then use those and keep the panel on the house, but if you travel where there *may* be an outlet, it's good to have extra power on board as a backup. I was looking around at work today and I might be able to find a plug close to the loading docks where my boss parks.

If anyone is interested, a red Volt blew past me on the highway on Tuesday doing about 75. Don't think he made it to work without using gas.
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013

"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015

"Photon" - 2017 Bolt EV LT in Orange with QC - 7/31/2017

Solar-powered since 10/10/2013

PV1
Site Moderator
Posts: 2931
Joined: Fri Apr 27, 2012 4:22 pm
Location: Pittsburgh, PA
Contact: Website

Re: solar on the car roof

Sun Aug 12, 2012 6:38 pm

If anybody can post dimensions of the roof of the i, I found several flexible solar panels that weigh next to nothing and are ultra low-profile while still putting out power at nearly the level of rigid solar panels.
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013

"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015

"Photon" - 2017 Bolt EV LT in Orange with QC - 7/31/2017

Solar-powered since 10/10/2013

Don
Site Moderator
Posts: 2754
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: solar on the car roof

Sun Aug 12, 2012 6:47 pm

If you removed the radio antenna and sealed the hole in the roof, you have an area about 48 inches wide by 63 or 64 inches long . . . . but unless your panels were flush to the roof of the car, the rear hatch wouldn't open

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2017 Chevy Volt Premier
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1979 Honda CBX six into six

PV1
Site Moderator
Posts: 2931
Joined: Fri Apr 27, 2012 4:22 pm
Location: Pittsburgh, PA
Contact: Website

Re: solar on the car roof

Tue Aug 14, 2012 9:11 am

With the dimensions provided (thanks Don), I can fit three 130 watt flexible panels on the roof, or five 50 watt panels, for total outputs of 390 watts or 250 watts. I'm a little skeptical of the 130 watt panels, they seem too small for their output. Here's the websites:

50 watt
http://www.polysolarpanel.com/china-alu ... 12827.html

130 watt
http://sell.lulusoso.com/selling-leads/ ... panel.html

Also, here's some 50 watt'ers I just found on eBay. I can fit 6 of these on the car and keep the antenna.
http://www.ebay.com/itm/100Watt-12V-2-5 ... 4ab94e9746
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013

"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015

"Photon" - 2017 Bolt EV LT in Orange with QC - 7/31/2017

Solar-powered since 10/10/2013

Don
Site Moderator
Posts: 2754
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: solar on the car roof

Tue Aug 14, 2012 2:27 pm

Pretty optomistic 'fit'

3 of the 130 panels are a perfect fit width wise, but they're 11 or 12 inches longer than the roof

3 of the 50 watt panels side by side are 55 inches, 7 inches wider than the roof, but the other two would fit behind them

Anyway - If you could get 250 watts worth up there and you conservatively got half of that amount for 8 hours, you'd get about 1 Kwh on a good day . . . . or about 4 to 4.5 miles of range. Better than they claim for the Fisker Karma (which makes me think my figures are probably a bit optomistic) but not enough extra range to make much of a difference, and of course there will be days when you get next to nothing, so it's not power you can count on

But . . . . nothing like emphirical evidence to trump all theoretical guesses - When you get them up there, we'll know for sure. It's very interesting to me and I'll be following your exploits closely - Are you getting the car anytime soon?

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2017 Chevy Volt Premier
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1979 Honda CBX six into six

Return to “General Technical Discussions”