Blackouts or brownouts happen in Granada, Nicaragua (and for that matter, al of Central America) but they don’t happen every day. During a typical year, we experience about four or five blackouts. It’s not too much and it takes only between 2 and 4 hours in general for the power to come back on.
I had a generator about 10 years ago because back then, we had blackouts almost every day. Blackouts don’t happen as frequently any more, so, while I still have the generator, I don’t use it. I normally just wait until the electricity comes back on.