So 4 times a year is a bit of a pain??? 
@filbert I used this on shared hosting by generating it on my mac OSX, just boot a live cd and follow: Tutorial for OS X local certificates and Shared Hosting
As long as you have ssl/tls access in your cpanel should be good to go. Also let me know your webhost so I can put them on the naughty list here: Web Hosting who support Lets Encrypt