Nancy Reading wrote:
Jay Angler wrote:I can't imagine how people cope. We just had 60 km/h gusts the other day and I'm still cleaning up the chaos and will be for at least a week. That's baby wind compared to a hurricane.
We get storms of about 90 mph most winters (still short of hurricanes - that is a bit more unusual) If you get it all the time the infrastructure and environment get used to it - if not they fail....that's what I want to avoid too. There is no point in forking out hundreds (or thousands) of pounds and having the panels sail away into the Loch. Also the constant battering of lesser winds (temperature fluctuations are less of an issue here, but appear to be huge in parts of the USofA), might lead to fatigue issues too.
That's good what you say about the panels lasting reasonably well these days Michael. All the technology seems so confusing it's difficult to know what might be best.
Nancy I always recommend if you have the land put them on the ground. Just that will reduce the possibility of wind damage. There is no need to loose the ground either as under an array turns out to be a great place to store firewood or a lawn tractor or a chicken run or a compost station etc.Next would be buy a rack engineered for the climate. There are a lot of flimsy racks being sold online. Another point is panel size. The utility sized panels are huge and their ratio of surface area to glass is very large. For roofs I have limited my arrays to the 450-500 watt range now. You can also add a third horizontal rail for extra support. I use these racking systems here:
https://fast-rack.ca/

they have on staff engineering as well.
As far as longevity its 25 years plus and even then barring mechanical failures of the seals your panel will be putting out 85-90 percent or its original rated power. I wish every device you buy was forced to have lifespan ratings on them like solar panels must. Solar is definitely having a moment with another oil war ongoing, data centres driving up utility bills and just general societal angst. Interview installers,find a company aligned with your goals, take the time to plan it out; good solar is slow and deliberate, make sure the system incorporates batteries either now or in the future as its turning into a must have more and more.
Cheers,
David Baillie