Will there be a loss in seo positions when installing ssl?

Question

Google

I want to know if installing an SSL certificate on a working site (worked without SSL for 3 years) will result in a loss in SEO positions, or will the site not work properly?

Answer 1

Will.
Because from the point of view of the search engines, this is a different site (in some way).
But how deep and long the drawdown will be will depend on the performer of the transfer.
If everything is done correctly (set up redirects, check internal links, and sitemap, and robots.txt, and inform the search engines about the move in the webmaster's offices), then the negative consequences will be minimal.
But you definitely need to move.

Answer 2

Yes, there will be a short loss when merging and redirecting in a week, everything will quickly recover, perhaps some of the positions are raised by the link

Answer 3

SSL must have now, "there is no choice .." (song)

Answer 4

Here's how lucky. Even if you go correctly according to the precepts of search engines = the result is unpredictable. It can be that in + that in -.
But there is no choice, it is necessary to pass.