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Old 11-22-2015, 12:35 PM   #21 (permalink)
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Quote:
Originally Posted by oil pan 4 View Post
I should mention that large efficient traditional glass topped aluminum sided mono crystal panel
FYI ... they make semi-flexible panels out of the high efficiency Solar cells.

Link
Peak of ~23.5% Efficiency
~$2.165 / Watt

But ... they don't come with the long warranties of the traditional rigid panels.

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Old 11-22-2015, 01:44 PM   #22 (permalink)
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Those were the kinds of panels I was originally looking at.
The main problem with those panels is the big plastic blister on the underside where the MC4 connectors tie in.

That 120 watt panel is about 4 feet long and 2 feet wide. That is kind of big for a regular car, it might work for a hatch back car and I could see it working on a mini van, regular van or SUV.

Then I saw something to the effect of this when researching what panels to use:
Quote:
Be advised, this panel is a laminated polymer and when it heats up in the sunshine, it will EXPAND. If you have glued or screwed it to a flat or curved surface or frame, expect it to buckle or sag when it heats up. Some flexibility in mounting is required.
That is why I did not use these big flexible ones. Plus the price, they are typically around $5/watt. I don't know what the shipping on those panels looks like but if its under $2.50/watt then its a fire sale.
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Last edited by oil pan 4; 11-22-2015 at 04:16 PM..
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Old 11-24-2015, 10:36 PM   #23 (permalink)
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I spent the last 3 days looking at every flexible solar panel I could find and I think I stumbled upon the best way to attach low profile panels to the top of a vehicle 4 years ago when I RTV'ed those 5 watt fiber glass backed panels to the top of my suburban.

Just in case I am wrong, I bought a 100 watt and a 30 watt semi flexible solar panel like in the link: http://afp-power.com/collections/sem...le-solar-panel
Don't think it will end up on top of a vehicle but I will test and evaluate it for such an application.
They seem kind of neat, I figure it will end up as part of my backup power contingency plan.



Should be here before Dec 2.
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Last edited by oil pan 4; 11-25-2015 at 12:37 PM..
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Old 11-28-2015, 11:41 PM   #24 (permalink)
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The panels arrived.
The 30 watt appears that it may be suitable to vehicle use.

The 100 watt panel seems like it may not want to conform to a convex surface. It seems like it needs real flat or a flat curved surface.

The only thing I don't like is the hump where the wires tie into the panels.
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2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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Old 12-01-2015, 03:55 PM   #25 (permalink)
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The grid tie inverter is up and running.
I wired the grid tie into my vampire load circuit. I tested the vampire circuit and power inverter back feed setup with my fluke325 amp clamp attached to the main where it comes into the house between the meter and 200 amp breaker, it was drawing a steady 1 amp with the grid tie disconnected.
With the grid tie going it was pumping 50 watts into vampire circuit, cutting the amount of power drawn by that line through the power meter in half.

So I am grid tied but not really. The last thing I want to do is produce more power than I use because my dumb smart meter will detect any power flow, doesn't matter if its coming or going and count it as consumption.
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Old 12-18-2015, 05:58 PM   #26 (permalink)
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At peak the panels put out around 50 to 60 watts to the grid tie.

So far it looks like during the winter with the vehicle battery charged, the grid tie will pump about 1/4 to 1/3 KwH per day into the grid.

Not much but its better than nothing.

This low production is mostly because the grid tie inverter uses between 12 and 28 volts DC. These panels only produce 15 to 17 volts under load.
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Old 12-19-2015, 12:20 AM   #27 (permalink)
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This could totally make sense if you have an RV covered with 1000+Watts
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Old 12-19-2015, 02:16 AM   #28 (permalink)
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http://store.evtv.me/products.php?cat=22

There was some discussion in a EVTV episode about how these panels use an edge-connected cell that IIRC don't need the 'lump' connector. 120 watts for $245. Maybe it's the same cell.
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Old 12-19-2015, 10:18 AM   #29 (permalink)
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I use my excess solar power to run a vent fan to try and keep the vehicle a bit cooler. On the next van, I'll go for one on each side, mounted in the flow through ventilation exits.

I already have the panels, so what's the payback time if I added an inverter? I also suppose that most days the vehicle isn't parked at the house? I would like to run *something* off the excess current once my car batteries are full.
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Old 12-19-2015, 11:37 AM   #30 (permalink)
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Yeah I plan on figuring something out to try and cool it off a little bit during the summer.

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1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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