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07-22-2010, 04:16 AM
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#1
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Senior Member
Join Date: Mar 2010
Location: Christchurch, NZ
Posts: 313
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Directional Solar panels
Hi all. I have searched the forum and found many posts on solar, but no-one seems to have mentioned the solar panels that follow the sun around during the day. They (apparently) can increase the efficiency of the panels (by up to a factor of 7!) particularly as we are a lot further south and below the tropics.
Has anyone here heard of, or used such a system? I wait with bated breath for replies!! (Fabulous forum - learning heaps!)
Cheers
__________________
Graham Gracie in a 1999 Mirada, V10 Petrol. New Zealand, Suzuki Escudo 2001 2.5L V6. Mini poodle, Pierre and mini schnauzer, Maddie.
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07-22-2010, 05:04 AM
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#2
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Senior Member
National RV Owners Club Ford Super Duty Owner
Join Date: May 2007
Location: El Cajon CA
Posts: 2,083
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You can do a search for RV Solar Tracker, RV and Marine Mounts - RV Solar Tracker
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2007 Sea Breeze LX 8321 Ford Chassis
2004 Ford Ranger Edge
El Cajon CA.
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07-22-2010, 08:37 AM
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#3
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Senior Member
Newmar Owners Club
Join Date: Jan 2010
Posts: 4,589
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I suspect that one's RV lifestyle would specifically have to be focused to off-the-grid living to utilize this feature. This seems to be an all or nothing feature in that it would be difficult to mix stationary panels with tracker panels because of the shadow the tracker panels would cast. In addition, you may not end up with as many panel as with a stationary installation because of clearance problems with the tracker system. Although, if the tracker system is more efficient, you might not need as many panels and a cost/capacity analysis would be needed to determine if the reduction of panels would offset the additional cost of the tracker system.
__________________
2007 Newmar DSDP 4023
Discovery is seeing what everyone else has seen and thinking what no one else has thought.
If you want to see what man made go East; if you want to see what God made go West.
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07-22-2010, 09:04 AM
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#4
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Senior Member
Newmar Owners Club Nor'easters Club Appalachian Campers Ford Super Duty Owner Coastal Campers
Join Date: Dec 2007
Posts: 2,463
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Quote:
Originally Posted by Richard S.
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Interesting link, though at $2500 each it is 5 times the cost of a 230W panel. so it would be worth it only if you do get 5 to 7X the performance. I wonder how it is stowed...
We use manual tilting mounts, which are OK, but still only give peak output for 4 to 5 hours of the day, and you have to position the coach East-West to use them most efficiently.
Stewart
__________________
Stewart, Brenda and kids
2008 Newmar Canyon Star 3410, now at a new home
2006 Roadtrek Versatile 210
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07-22-2010, 09:18 AM
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#5
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Senior Member
Fleetwood Owners Club
Join Date: May 2009
Location: Ca/UT
Posts: 417
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IMO, if the panel(s) were laid flat on the top of the RV, wouldnt that eliminate the need to follow?
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donnie(KE6DON), Linda, and 2furrykid s Buddy & Rain
2016 SouthWind32VS, 2014 Jeep Cherokee Limited
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07-22-2010, 10:31 AM
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#6
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Senior Member
National RV Owners Club
Join Date: Jun 2010
Posts: 4,581
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I live off grid and use solar panels with generator back up to provide power for our house. Most of the people I talk simply add another one or two panels instead of buying a tracker. You can buy a lot of additional solar panels for the $2500 they want for that device.
__________________
Bob & Sandi, dogs Tasha a Frenchie and Tiki a Skipperkey
SW OREGON 2005 34 foot DolphinLX
If towing: a bright red 2016 Mini Cooper on a tow dolly.
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07-22-2010, 10:50 AM
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#7
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Senior Member
Join Date: Aug 2009
Posts: 1,696
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Quote:
Originally Posted by 1ciderdog
I live off grid and use solar panels with generator back up to provide power for our house. Most of the people I talk simply add another one or two panels instead of buying a tracker. You can buy a lot of additional solar panels for the $2500 they want for that device.
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Seems like a good and cost efficient approach.
Sure is interesting that many RVers want, buy and install solar panels on their RV rooftops - but then want to park in the shade to lower their RV temperatures...
We use a single 55 watt panel that is used at ground level, connected with a cord long enough to allow us to change exposure to the sun throughout the day - and still park the RV in any available shade. We boondock a lot, and if we can keep the solar panel well exposed to the sun during daylight hours, that 55 watts is more than enough for the 2 of us for normal lights and some evening TV - we also have a 300 watt inverter.
Still, the technology and relatively inexpensive materials involved, SHOULD allow a pretty inexpensive tracking setup for smaller arrays to permit efficient operation with minimal $$$ outlay - a pair or 50 watt panels combined with such a tracking system, could provide substantial power for many Rvers for all but the heavier loads such as air conditioners and microwave ovens.
There's a ready $$$ making market out there for some ambitious developer type...
__________________
John Day....|'88 Winnebago Super Chief 27ft. Class A Eastern .....|'88 KIT model 240 24 ft. 5er Oregon ......|'02 Dodge/Cummins 2500 Quad Cab
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07-22-2010, 11:15 AM
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#8
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Senior Member
Newmar Owners Club
Join Date: Jan 2010
Posts: 4,589
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Quote:
Originally Posted by donie
IMO, if the panel(s) were laid flat on the top of the RV, wouldnt that eliminate the need to follow?
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As the sun angle changes from shining directly on the panels to some deceasing angle the amount of solar energy avilable to the panels decreases and so does the charge current to the batteries.
__________________
2007 Newmar DSDP 4023
Discovery is seeing what everyone else has seen and thinking what no one else has thought.
If you want to see what man made go East; if you want to see what God made go West.
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07-22-2010, 01:07 PM
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#9
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Senior Member
Join Date: Aug 2009
Posts: 1,696
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I know there are relatively inexpensive telescope tracking devices for tracking the orbit of various celestial objects - seems like a simple single-axis wind-up clock-like device could be fabricated to track the sun's daytime movement thru the day, and then at end of travel, reset position for the next day - sorta like an oscillating lawn sprinkler...
An Internet search on solar panel tracking will show MANY pointers and schemes - unfortunately, most seem aimed at larger and more complex arrays - and very few, or none, geared to few and simpler solar panel setups - especially portable ones. Way too much overkill for someone like me and others looking for a cheaper and simpler setup that is easily moved from one spot to another. :(
No help for this thread perhaps - but maybe get someone's grey matter working...
__________________
John Day....|'88 Winnebago Super Chief 27ft. Class A Eastern .....|'88 KIT model 240 24 ft. 5er Oregon ......|'02 Dodge/Cummins 2500 Quad Cab
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07-22-2010, 04:11 PM
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#10
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Senior Member
Join Date: Aug 2009
Posts: 1,696
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__________________
John Day....|'88 Winnebago Super Chief 27ft. Class A Eastern .....|'88 KIT model 240 24 ft. 5er Oregon ......|'02 Dodge/Cummins 2500 Quad Cab
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07-22-2010, 10:57 PM
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#11
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Senior Member
Join Date: Mar 2010
Location: Christchurch, NZ
Posts: 313
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Many thanks for the prompt replies. We are about 40 degrees South so we NEVER get the sun directly overhead. I can purcahse a ready made tracker system from a local supplier - haven't asked the price yet. It seems that a couple of 100W or thereabouts that track efficiently would provide much more power than the bank of 6 100W that lay flat on the roof. Agree that it would be harder to set-up and fold away, but the extra roof space and efficiency may more than out-weigh the cost factors.
__________________
Graham Gracie in a 1999 Mirada, V10 Petrol. New Zealand, Suzuki Escudo 2001 2.5L V6. Mini poodle, Pierre and mini schnauzer, Maddie.
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