Off-grid has its pros and cons.
The huge problem with off-grid is - there is NO way to store the extra power you make. No cost-effective way, anyway. You can have a day when you make 20 times the power you are using and it ALL goes to waste.
The nice thing about off-grid is the equipment is MUCH cheaper. You can buy uncertified solar panels at half-cost (or less). Same with electronics. You can buy an off-grid 3000 watt inverter for $250 instead of paying $1300-$2000 for a grid-tie inverter.
As to solar being green? I doubt it. An awful lot of coal and petro fuel is used to make and ship solar equipment and batteries. I doubt in the end -they are much cleaner when all is factored in. Certainly they seem greener when only the end-user is looked at.