Installation of Solar Panels in a Hurricane-prone area

Posted by Douglas Bray on August 08, 2006, 12:22:34 PM

Installation of Solar Panels in a Hurricane-prone area
Hi all:
My wife and I are building a home in Belize. The entire structure will be concrete including the roof which will have an marginal hip.
We want to go off-grid and have dismissed wind power as we don't want a spinning turbine amongst the Toucans. We plan to mount a solar array on the roof to meet our electrical needs. The roof will be about 25' above grade.
Does anyone have any information or experience in mounting solar panels in a hurricane-prone area? What mountings did you use? What was your experience in high wind conditions, tropical storm or hurricane? Did you plan to remove them if a hurricane was closing in? Did you plan for any other remedial action/protection of the panels themselves should a hurricane roll in, etc?
Any information you could pass on would be greatly appreciated.
Cheers,
Doug
 

Posted by Steve Bird on August 08, 2006, 09:48:44 PM

Re: Installation of Solar Panels in a Hurricane-prone area (Reply #1)
Hi Doug, Funny you should mention Belize as my wife and I will be in Ambergris Caye in a bit. I would think you would mount according to a building code, and treat your panels as we would here in New England...like gold! Make sure you have extra plywood to cover them during a hurricane, use  simple rubber bungees to fasten the plywood which is cut exactly to the size of the glass, with no overhang to catch the wind, your panels must be able to be "stowed" flat and locked down (if you use adjustable frames) against the roof line easily and quickly with no cable length problems or allowing any or little wind to get underneath the panels. Debris flying at 100 mph will penetrate a vertical block wall as you know, a glancing blow will not. Removal of the panels is really not an option as the roof is 25 ft. above the ground and surely be very difficult and dangerous.
 I would not hesitate at all using small turbines also. Toucans have an aversion to painted "eyes" on the cones of the center of turbines. I would see if wind is advisable at your home location an would not hesitate to have a local artist paint up a pair of AirX 400 watt turbines for you and install them with an easy-tilt tower.
   Steve
 Together the solar and wind combo is unbeatable.
 

Posted by Douglas Bray on August 09, 2006, 01:53:57 PM

Re: Installation of Solar Panels in a Hurricane-prone area (Reply #2)
Hi Steve:
Weird, we're just across the water in Corozal. We've got 50 weeks to go so we're doing all the background planning we can do. On our last trip down we rented a two-bedroom guesthouse with all the amenities (air, fans, fridge, tv's, etc.) We racked up around 56 Kwh per week for the three of us. I can't see us using double that amount but that's what we're sizing for at this point in time. I figure at $0.21 USD per KWH it won't be as long a payback as you might think. Stay in touch!
Do you frequent the Belize forums? http://www.belizeforum.com/
Cheers,
Doug
 

Posted by Tom Mayrand on August 11, 2006, 12:50:40 PM

Re: Installation of Solar Panels in a Hurricane-prone area (Reply #3)
You may consider mounting the panels on the ground. Since Belize gets very hot, mounting the panels on the roof may make them too hot and lower effiency. If you mount them on the ground you will save cost on grounding equipment, though belize may not have strict electical codes. Also, if they are on the ground you can use a quick disconnect and bring the panels indoors during hurricanes. Have you consider installing hot water panels? I know propane is expensive down there and sun is a plenty so free hot water should be attractive. See you in Placencia......
 

Posted by Chris Harris on August 13, 2006, 06:48:46 PM

Re: Installation of Solar Panels in a Hurricane-prone area (Reply #4)
Hi Doug.  My wife and i have been living just north of Ronkey River in southern Belize for 18months now.  We have a Solar Power system which apart from one lightning strike has behaved immaculately.
To respond to your questions, firstly we used the mountings which were supplied with the panels.  basically this is an aluminium frame which screws into the roof. The legs which support the frame allow for limited elevation of the frame to allow the pv panels to be at the correct angle to maximise energy absorbtion. We have had some high winds in squalls over the past 18months but thankfully no hurricanes. Frankly, we are not going to risk life and limb climbing around on the roof putting plywood sheets in place for protection.  We are right on the beach, so flying debris is probably less of a risk than say further inland.  The panels are insured in any case.  if there is a hurricane, WE LEAVE!  With personal possessions, dogs, food cash and clothing.  We do of course have an emergency plan for evacuation.  The problem with making protection for panels (and everything else, eg windows, doors water supply etc) is that you may have several false alarms where the hurricane passes close but does not hit you.  In this case you will have to put on your protective panels and 8hours later take them off again.  last year we had several near misses. Constant on off on off would have driven us mad.  Best to K.I.S.S. Listen to Love FM and the NEMO releases and do as they say.
Your planned power consumption sounds about right.  We are averaging 56KW per week, but we do not have air conditioning as we get all the cooling we need from the almost constant on shore wind (which is free).  Take care positioning your house btw as it will make a big difference to how cool it gets inside.
The comment made by one of your responders concerning solar hot water is right.  Solar hot water is wonderful.  We have 24/7 hot (well nearly boiling actually) water.  It cost BZ$ 3000.00 and from now on its free!.
Right now we are looking at installing a couple of small wind generators just to top up our battery bank when we get low.  This is usually Nov-Jan.
If you need more info let me know or e mail me direct.
Good luck Chris
 
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