Solar modules can power directly DC fans for ventilation purposes

If you have a greenhouse or other large space and need ventilation, the most cost-effective way is to pair solar modules directly to brushless DC motor fans. There is no need for inverters, batteries, or much else other than some wire to connect together the modules and fans. Here's an example of a 16 inch fan that would work very well with a low-cost 265 Watt solar module.