I have one, thanks to taxpayers for half of it. It is not off grid but could be if I installed a storage system (batteries) that would last 3-5 days under perfect conditions. Winter is not perfect conditions.state of the art solar power systems
Instead I am getting a whole house propane generator that will provide power indefinitely at 30%-40% of the cost of solar backup to install.
I know people that were very glad to have them when last summers wind storm left them without power for days or weeks.