There are many inverters for PV systems that can be installed outdoors. In fact, most grid-tied inverters are designed for outdoor use, although most off-grid inverters are not weatherproof and are generally mounted indoors, close to the battery bank.
[pdf] While lithium-ion batteries grab headlines, Uruguay's pumped hydro storage projects are the quiet heroes. The 50MW Batlle project near Montevideo can power 30,000 homes for 8 hours – enough time to watch three full football matches (plus overtime!).
[pdf] In some ways, solar generators are misnamed. “Technically, a PV (photovoltaic) panel—or solar panel—is what generates power,” says Ford. “The problem is that sunlight varies throughout the day, so voltag.
[pdf] 
