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  TOV News > Honda's Insight Concept Makes its World Debut > > Re: Solar Panels

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aznstuart
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Solar Panels [View News Item]    (Score: 1, Normal) 10-02-2008 12:32
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Are there plans to put solar panels on that large roof? That would help boost mileage a little. I know Honda has been researching solar panels recently. Hmm.
Insightman
Profile for Insightman
Re: Solar Panels [View News Item]    (Score: 1, Normal) 10-02-2008 12:45
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Ka-ching.
Smoke_Jaguar4
Profile for Smoke_Jaguar4
Re: Solar Panels [View News Item]    (Score: 1, Normal) 10-02-2008 13:46
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aznstuart wrote:
Are there plans to put solar panels on that large roof? That would help boost mileage a little. I know Honda has been researching solar panels recently. Hmm.

There's not enough roof surface area to make a noticeable contribution to the main drive system. Standard solar systems are too heavy and flexible systems are still very expensive for this price point.

However, Toyota has been working on roof solar to power the auxiliary systems. This could make a good aftermarket option.

Bepperb
Profile for Bepperb
Re: Solar Panels [View News Item]    (Score: 1, Normal) 10-02-2008 14:22
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If you covered the roof with solar panels, and let it sit in the parking lot at work for eight hours on a sunny day, you'd have enough power to pull out of your parking spot, that's it.

Toyota is doing this to the Prius. It's more or less a marketing gimmick. It will not have any significant impact on mileage.

Jonniedee
Profile for Jonniedee
Re: Solar Panels [View News Item]    (Score: 1, Normal) 10-02-2008 14:40
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Mazda used a solar cell on the old Millennia to run a cooling fan for when the car was parked in the sun.
ceric
Profile for ceric
Re: Solar Panels [View News Item]    (Score: 1, Normal) 10-02-2008 14:58
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Typical Solar panel of roof area can generate 300W (at least) peak power.
Let it sit for 8 hours, you will have about 1600 W*h (assuming 200W average - peak power is computed at max sunshine and direct angle).
That is about 2hp for 1 hour. Assuming you drive very slowly (like a grandma), it takes about 20hp/sec. 2hp*h can let you drive about 2*3600/20 = 360sec = 6 minutes.

Anyway, that is just a simple calculation. Realistically, it is probably enough for a 2-3 minute slow rolling.

Toyota does not intend for the planned Solar panel to charge the traction battery. Instead, it is to be used to assist A/C.




02MDX&05TSX
Profile for 02MDX&05TSX
Re: Solar Panels [View News Item]    (Score: 1, Normal) 10-02-2008 15:42
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ceric wrote:
Typical Solar panel of roof area can generate 300W (at least) peak power.
Let it sit for 8 hours, you will have about 1600 W*h (assuming 200W average - peak power is computed at max sunshine and direct angle).
That is about 2hp for 1 hour. Assuming you drive very slowly (like a grandma), it takes about 20hp/sec. 2hp*h can let you drive about 2*3600/20 = 360sec = 6 minutes.

Anyway, that is just a simple calculation. Realistically, it is probably enough for a 2-3 minute slow rolling.

Toyota does not intend for the planned Solar panel to charge the traction battery. Instead, it is to be used to assist A/C.



A *very good* panel measuring 1.3 meters by 1 meter will produce roughly 150W after other losses are counted in. I know, I just installed 10 of them on my house! So, your calculations are at least 2x too optimistic!


TheGripper
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Re: Solar Panels [View News Item]    (Score: 1, Normal) 10-02-2008 21:37
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02MDX&05TSX wrote:
ceric wrote:
Typical Solar panel of roof area can generate 300W (at least) peak power.
Let it sit for 8 hours, you will have about 1600 W*h (assuming 200W average - peak power is computed at max sunshine and direct angle).
That is about 2hp for 1 hour. Assuming you drive very slowly (like a grandma), it takes about 20hp/sec. 2hp*h can let you drive about 2*3600/20 = 360sec = 6 minutes.

Anyway, that is just a simple calculation. Realistically, it is probably enough for a 2-3 minute slow rolling.

Toyota does not intend for the planned Solar panel to charge the traction battery. Instead, it is to be used to assist A/C.



A *very good* panel measuring 1.3 meters by 1 meter will produce roughly 150W after other losses are counted in. I know, I just installed 10 of them on my house! So, your calculations are at least 2x too optimistic!




I have been planning a solar installation at my house for the spring, if you dont mind, would you let us know roughly what your investment was - and - are you happy with it?

Nice stable in the barn there too by the way.

ipribadi
Profile for ipribadi
Re: Solar Panels [View News Item]    (Score: 1, Normal) 10-02-2008 22:28
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ceric wrote:
Typical Solar panel of roof area can generate 300W (at least) peak power.
Let it sit for 8 hours, you will have about 1600 W*h (assuming 200W average - peak power is computed at max sunshine and direct angle).
That is about 2hp for 1 hour. Assuming you drive very slowly (like a grandma), it takes about 20hp/sec. 2hp*h can let you drive about 2*3600/20 = 360sec = 6 minutes.

Anyway, that is just a simple calculation. Realistically, it is probably enough for a 2-3 minute slow rolling.

Toyota does not intend for the planned Solar panel to charge the traction battery. Instead, it is to be used to assist A/C.
Not to mention the extra cost for this feature.
Adding $3,000 for a solar panel system that adds 0.1 mpg does not make sense.

Heck, installing a solar panel on my home roof still does not make much economical sense yet (it does make environmental sense tho)... I think the ROI is 15+ years depending on area.

02MDX&05TSX
Profile for 02MDX&05TSX
Re: Solar Panels [View News Item]    (Score: 1, Normal) 10-03-2008 00:09
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TheGripper wrote:
I have been planning a solar installation at my house for the spring, if you dont mind, would you let us know roughly what your investment was - and - are you happy with it?

Nice stable in the barn there too by the way.



No problem. The panels are from Day4Energy.com They are the 170W versions of the 48MC panels. I have a 2kW Fronius Inverter. The system is tied to the grid and my electric meter spins backwards when the generation is more than my consumption. There is also a Renewable Energy Credit meter from the Utility that measures every kWh that I produce.

The utility pays me $0.13 per kWh I produce above and beyond my avoiding the $0.09 per kWh cost I am avoiding per unit produced (so I effectively make $0.22 per kWh produced). The system will produce around 300 kWh per month. I am fortunate in that I live in New Mexico where we have lots and lots of sun. System payback will be 13 years at current rates, but will probably pay back sooner as the local utility has recently asked for an 18% increase in electric rates for next year and will continue to ask for rate increases in the near future. When all is said and done, the system should payback in less than 10 years. This payback also includes the $2,000 Federal Tax rebate and the New Mexico State rebate which covers the remainder of the costs up to 33% of the installed system cost.

The system cost us about $16,000 out of pocket and about $10,500 after tax breaks are factored in. A big investment for sure, but we feel it's the right thing to do, especially in our New Mexico climate.


 
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