Makro here in South Africa have put solar panels on all the parking, to provide shade and power. Because of the heat the inverters also have by them a pair of big 45cm diameter industrial fans, running 24/7, to provide extra cooling for the inverters. Inverters are in a corner, with a roof and a fence to keep them safe, and the fans are bolted to the tar of the parking bay this originally was. Have not seen any fail so far, and they have been there for nearly 2 years now, probably already paid off the cost of the panels in power savings as well.
Panels themselves are a Chinese made one, installed and maintained by a South African company, who specialise in turnkey solar installations, and also who do rent to own solar arrays, as there currently is no legislation allowing you to have grid tied panels and feed power back into the grid (thank you for the state owned failopoly of ESKOM, currently billions of dollars in the red due to reasons, and who the rest of the taxpayers have to bail out again and again) legally, though there are plenty of smaller systems around doing peak shaving.
Like Martin Lorton, having battery backed solar to provide lower cost power and a more reliable grid. There are some municipalities that do allow grid tie, at a ridiculously low rate, equal to the cost they pay off peak, but with a rather high fixed charge per month, along with limits on power allowed to be fed back as well.
For those looking for DIY solar panels, and DC arcing with even a low (60VDC) panel array, look at Kreosan with his home made panels here. Ukranian, but if you can understand Dave you can understand him in English.